Dateierweiterungen allgemein .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .A UNIX Library [UNIX] ADA Program .A01 ARJ Multi-volume Compressed Archive (can be 01 to 99) (also see .000) .A01 - .A10 OzWin CompuServe E-mail/Forum Access SYSOP File .A06 Lotto Pro 2002 Smart Number Ticket .A11 AIIM Graphic .A31 Authorware 3.x Library .A3D Amapi 3D Modeling .A3K Yamaha A3000 Sampler File .A3L Authorware 3.x Library .A3M Unpackaged Authorware MacIntosh File .A3W Unpackaged Authorware Windows File .A41 Authorware 4.x Library .A4L Authorware 4.x Library .A4M Unpackaged Authorware MacIntosh File .A4P Authorware File Without Runtime .A4W Unpackaged Authorware Windows File .A51 Authorware 5.x Library .A5L Authorware 5.x Library .A5W Unpackaged Authorware Windows File .A64 Artist 64 [XnView] .A8 Cubicomp PictureMaker 24bit 3D Animation (DOS-based animation program; graphics cards external to computer; Cubicomp closed 1990) .A86 A86 Assembler Program File .AA Audio Book File PROGNOSIS Automated Analyst Document File .AAB Macromedia Authorware Binary .AAC Advanced Audio Coding File .AAM Authorware Shocked File .AAO America's Army Map .AAS Authorware Shocked Packet .AAT Arcinfo Line Data Attribute Data (GIS-related file) .AB Applix Builder File .AB2 Parson's Address Book .AB3 PhotoImpact Album File .AB6 AB Stat Data .AB8 AB Stat Data .AB$ AutoCAD Spooled Plot File .ABA Palm Address Book File .ABC Flowchart Musical Notation Language File (folk melodies originally) .ABD AmBiz Bonus Calculator Data File Adventure Builder Database .ABF Adobe Binary Screen Font .ABK Corel Draw AutoBackup Any Automatic Backup .ABL Maxagrid Avails Data File (text format) .ABM HitPlayer Audio Album File Photo Impressions 2000 Album Album File (various) .ABO Applix Builder Turbo File .ABR Photoshop Brush .ABS Abstracts MPEG Audio Sound File [MPEG] PC GNU Compiler Output Abscissa Data File Optocat [XnView] .ABT The Arbiter Sports Official Schedule [Viewer] .ABW AbiWord Document File .ABX WordPerfect Address Book File .ABZ AbszOrb (textured spinning orb creator) .AC CaseWare Working Papers Client File .AC_ CaseWare Working Papers Compressed Client File .AC$ AutoCAD Undo Info .AC3 AC3 Audio File Format [DVD Maestro, DVD Conductor] .ACA MS Agent Character File Project Manager Workbench File .ACB ACBM Graphic Image AOL Cab Launcher (archived data file) .ACC DR-DOS Viewmax File .ACD Chromeleon Channel Raw Data Sonic Foundry Acid Music File allCLEAR Flowcharting File MS Agent Character Definiton File .ACE The Ace Archiver Compressed File Aces200 [XnView] .ACF MS Agent Character File Photoshop Custom Filter .ACG MS Agent Preview File .ACH Rockwell Software Logix 5 File Speccy Snapshot .ACI ACI Development Appraisal .ACL Corel Draw 6 Keyboard Accelerator MS Office AutoCorrect List ACL For Windows (data mining software) Access Control List .ACM Audio Compression Manager Driver (Windows) Photoshop Command Button Windows System File ACBM Image File Interplay Compressed Sound File .ACO Photoshop Color Swatch File .ACP MS Office Assistant Preview File [Buy Office XP at Shop.Microsoft] File Used by Adobe Acrobat Paper Capture .ACQ AcqURL File (bookmark manager) .ACR American College of Radiology File Dicom [XnView] .ACS MS Agent Character File .ACT MS Office Actor Program File [Buy Office XP at Shop.Microsoft] FoxPro Documenting Wizard Action Diagram Photoshop Color Table Action! Presentation .ACU AppleLink-PE Compression Format (created by Floyd Zink; overtaken by Andy Nicholas' ShrinkIt; ShrinkIt should unpack) COBOL Intermediate Object File .ACV OS/2 Audio Drivers Photoshop Saved Curve Also see .ACW MS Accessibility Wizard Settings .AD AfterDark Screen Saver Ascend Password Protocol File .AD! OzWin CompuServe E-mail/Forum Access QS-Special - Get Marked Online .AD2 2-bit Compressed Voice File .AD3 3-bit Compressed Voice File .ADA ADA Program File ActiveDocs Answer Set .ADB ADA Package Body HP Organizer Appointment Database .ADC Chromeleon Demo Data File ActiveDocs Clipping Catalog Scanstudio 16-color Bitmap Graphic File Lingvo Dictionary Text File .ADD OS/2 Adapter Device Driver Adobe Pagemaker File Advantage Database Server Data Dictionary .ADE MS Access Project Extension [Buy Office XP at Shop.Microsoft] ADC Audio File .ADF Adapter Description File Admin Config File Amiga Disk File (Uncompressed 901120 byte DD Diskimage) [Amiga Forever] Dog Creek QC Mask File .ADI AutoCAD Plotter File Advantage Data Server Database Index File .ADJ LISCAD Plus Adjustment File .ADL QEMM MCA Adapter Description Library [MCA] OzWin CompuServe E-mail/Forum Access QS-Special Get Marked .ADM After Dark Screen Saver Module Windows Policy Template Addict Compiled Dictionary Advantage Data Server Database Memo File .ADN 1-2-3 Add-in Utility MS Access Blank Project Template [Buy Office XP at Shop.Microsoft] .ADO Photoshop Duotone Options Stata Program .ADP FaxWorks Modem Setup File Astound Dynamite File MS Access Project [Buy Office XP at Shop.Microsoft] AOLserver Dynamic Page File [AOL] .ADR After Dark Random Screen Saver Module Address Plus Database Smart Address Address Book Address Book Opera Web Browser Bookmark File .ADS ADA Package Specification .ADT HP NewWave Card Application Data File Advantage Data Server Database File Lingvo Dictionary File AdTech Fax File .ADV GUS Virtual Device Driver .ADX Lotus Approach Index File Archetype Designer Document Dynazip Active Delivery Script Sega Dreamcast Audio File [Source of files] .ADZ GZ-Packed Amiga Disk File (see ADF) [Amiga Forever] .AE SoftQuad Author/Editor File .AEF ELECTRICAL Designer .AEH iPer Advanced Embedded Hypertext .AEP ArcExplorer Project File .AER Adobe Atmosphere File [As of Mar 2002 in beta] .AEU MS AutoRoute Express Europe Route .AEX PGP Armored Extracted Public Encryption Key [PGP] .AF2 ABC Flowchart (Now Micrografx FlowCharter) .AF3 ABC Flowchart (Now Micrografx FlowCharter) .AFC Apple Sound File ArisFlow Commander File .AFD ArisFlow Diagram Prismo Graphics ActiveFile Data .AFF AnyForm Form .AFI Truevision Bitmap Graphic .AFL Lotus Font .AFM Outline Font Metric HP NewWave Cardfile Application LOUT File (High-Level Language For Document Formatting) .AFP Flowchart Symbol Palette Papyrus Document Storage Format Prismo Graphics ActiveFile Proxy IBM Transactional Data Format (Advanced Function Print) (AS400 computer) .AFS Filter Factory Photoshop Filter [Added] Sega Dreamcast Compressed Audio .AFT Flowchart Template AnyForm Template .AFW Flowchart Work Area .AFX Auto FX Photographic Edges (Photoshop add-in) .AG Applix Graphic Argus Spreadsheet File .AG4 Access G4 File [Buy Office XP at Shop.Microsoft] .AGF Atlas GeoFile .AGP Aspen Graphics Pages .AGW Aspen Graphics Windows .AHQ AudioHQ Plugin Module .AHS Photoshop Halftone Screens .AI Adobe Illustrator Vector Graphic [XnView] Corel Trace Drawing Progress Database After Image File Advantage Database Server File EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E] .AIF Knowledgeware Setup Information Audio Interchange File [IrfanView] SymbianOS Application Information File (set application properties) .AIFC Audio Interchange File [IrfanView] .AIFF Audio Interchange File [IrfanView] .AIH ArcView Optional Index File (GIS-related file) .AIJ Oracle After-Image Journal .AIL AutoImager File (batch image conversion) .AIM AOL Instant Messenger File [AOL] .AIML Artificial Intelligence Markup Language .AIN AIN Compressed Archive ArcView Optional Index File (GIS-related file) .AINSO VAX CRYSTALS Chemical Crystallogaphy File .AIO APL File Transfer Format .AIP Audiosoft Parameter File .AIQ AzureIQ Client File (IT Audit Reporting) .AIR Align It! Resource File Flight Simulator Aircraft Performance Info File [Free Flight Dynamic Editor] .AIS Array of Intensity Samples (Graphic) Velvet Studio Instruments ACDSee Image Sequence File .AIX HP NewWave Cardfile Application Data .AKF Acrobat Key File .AKW RoboHELP Help Project Index File .AL Oracle File (used for networking) .ALA Alan Adventure Language File Sharp Fax File (unverified) .ALB JASC Image Commander Album Steinberg Cubase or VST Backup Song File Photo Soap2 File .ALBM webAlbum Photo Album HP Photosmart Photo Printing Album .ALC Norton Internet Security Ad Server File MP3 Embedded Dynamic Lyrics .ALE Avid Log Exchange .ALF Abacus Law File ALF Logic File ("Another logical framework"--structure editor for Martin-Löf's monomorphic type theory) AdventNet Look and Feel Standards (ALFSTANDARDS.ALF) Aventail Connect License File (AVENTAIL.ALF) VPCom Remote User Configuration File LANDesk Client Manager Configuration File ACT! User Logon Tracking Color Quick Label Cadence Ambit BuildGates .ALI SAP Proprietary Format Document File OM2 OMALI Native OMALI Document .ALIAS Alias Image [XnView] .ALL Arts & Letters Symbols and Characters WordPerfect Printer Info Steinberg Cubase or VST Song File Always Working Page Format File .ALS Alias Image [XnView] Calmira Shortcut File .ALT WordPerfect Menu File .ALV Photoshop Levels Aladdin Knowledge Systems Vbox Available Languages File (software distribution) .ALX OM2 OMALI Plug-in Extension .ALZ ALZip Compressed File (Korean site) .AM Applix SHELF Macro Advantage Database Server File .AM2 AutoPlay Menu Studio Version 2 .AM3 AutoPlay Menu Studio Version 3 .AMB Radiance Ambient File Format .AMC Ant Movie Catalog .AMF Advanced Module Format Music File DSMIA/Asylum Module Music .AMG AMGC Compressed Archive (alternate site) AMG ACTOR System Image .AMI Cocreate SolidDesigner Annotation File Amiga Paint [XnView] .AML AutoMage (Automation/Macro Software) .AMM AMM File (pattern design pgm for Universal flat knitting machines) .AMP Photoshop Arbitrary Map Settings .AMS Extreme's Tracker Module Format Photoshop Monitor Setup Velvet Studio Module .AMZ The Amazon Trail Saved Game .AN Groundworks Text File .AN8 Anim8or 3D Animation .ANC Canon Computer Pattern Maker File .ANF AcuteNotes File (contains one or several notes order in a hierarchy) .ANI Animated Cursor Microangelo [IrfanView] .ANL Project Analyzer Saved Analysis .ANM DeluxPaint Animation .ANN Help Annotation .ANO Annotation File (often used with annotating PDF files) .ANS ANSI Graphic [ANSI] MS Word Text and Layout [Buy Office XP at Shop.Microsoft] .ANSR AnswerTool File .ANT SimAnt for Windows Saved Game File .ANV AirNav [XnView] .AOB DVD Audio File (MPEG-2 program streams with additional info) .AOF Acorn Object Format (used for data storage) .AOS Nokia Add-on Software .AOT ZenWorks Application Binary Object Template File .AP Applix Presents File Datalex EntryPoint 90 Data File WHAP-Compressed Amiga Archive .APA AlfaPad Organizer File ArcPad 6 Applet .APC Lotus Printer Driver Characters Centura Team Developer Compiled Application File .APD Lotus Printer Driver Centura Team Developer Dynamic Application Library File .APE Music Format [Many different players] .APF Lotus Printer Driver Fonts ArcPad 5 Profile Acrobat Profile File Homesite Project File Fax2000 File .API Lotus Printer Driver Info Photoshop Ink Colors Setup Application Program Interface Acrobat Plug-in 1st Reader Passed Parameter File .APIN Adobe InDesign Import/Export Filter .APJ Angel Debug Monitor Project File (link is PDF file) Music Screen Saver File (usually associated with .SCR file) ARM Project Manager File .APK GameSpy Arcade Service .APL Centura Team Developer Application Library File ArcPad 6 Layer APL Workspace File .APM ArcPad 6 File .APO Apollo Scripts .APP R:Base, Symphony, DR-DOS, FoxPro (or other) Application Centura Team Developer Normal Mode Application File dBASE Application Object File ArcPad 5 Project SymbianOS Application CLARION for Windows Application Executable Application (under DR-DOS, NeXTstep, Atari) .APR Lotus Approach 97 File ArcView Project File (GIS-related file) Employee Appraiser Performance Review File .APS MS Visual C++ File ArcPad 5 Symbology File Advanced Patching Systems with Error Checking .APT Centura Team Developer Text Mode Application File Lotus Approach Data View File Nimbus 7 SAMS Data File (a-priori temperature profiles) .APX Lotus Approach Paradox-specific Information File Borland C++ Appexpert Database ArcPad 6 XML File Ability Photopaint Image [XnView] .AQ Applix Data .AR Compressed Archive File (used by MS Midtown Madness 1 & 2 games) Midtown Madness City Add-on .ARA ATI Radeon Video Driver File .ARC Archive File .ARCHIMEDES Speccy Snapshot .ARF Automatic Response File .ARH ArHymo Hydrologic Simulation () .ARI Aristotle Audio File Compressed Archive .ARJ Compressed Archive (Stuffit can expand) .ARK Compressed Archive .ARL AOL Organizer File [AOL] .ARM Armadillo Software Protection System .ARN Astronomical Research Network [XnView] .ARPX8 Techno Toys Arp-X8 MIDI Arpeggiator File .ARQ Compressed Archive (often on a Macintosh) .ARR Atari Cubase Arrangement .ARS Artifax Report Editor (SQL query tool) .ART Clip Art File Xara Studio Drawing Blood Archive [Dragon UnPACKer] Duke Nukem 3D Archive [Dragon UnPACKer] Canon Crayola Art File Another Ray Tracer Format AOL Johnson-Grace Compressed File [AOL] First Publisher Raster Graphic PFS: Art Publisher [XnView] Art Director Image [XnView] Artisan [XnView] .ARV Arsiv File AutoRoute User Information .ARX Compressed Archive .ARY Compaq SmartStart Scripting Toolkit File .AS Applix Spreadsheet Macromedia Flash Action Script (include files when writing large scripts) .AS3 Alternate Sources Data File [Warning: Link goes to a sexually-oriented site.] APL*PLUS II/386 and III/Windows Source Code .AS4 AS/400 Client Access .ASA MS Visual InterDev File Active Server Document .ASC ASCII Text File [ASCII] PGP Armored Encrypted File [PGP] .ASCX Web User Control (part of MS .NET) .ASD MS Word Automatic Backup [Buy Office XP at Shop.Microsoft] Lotus Screen Driver MS Advanced Streaming Format Description File Astound Presentation .ASE Velvet Studio Sample .ASF MS Active Streaming (Media) File (contains audio and/or video compressed with 3rd party codecs) Statgraphics Data Lotus Screen Font APL*Plus/PC APL Shared File Electronic Arts Music File .ASH TASM Assembler Header .ASI Borland Assembler Include .ASK askSam Database .ASM Assembler Source Language (various) Pro/Engineer Assembly File .ASMX ASP.NET Webservices Source File .ASO Assembler Object Astound Dynamite Objects .ASP Active Server Page Procomm Plus ASPECT Program Astound Presentation File Photoshop Photo File Index Photoshop Separation Setup EROSION 3D Aspect File [Format (pdf)] .ASPI Audio Catalyst .ASPX ASP.NET Source File .ASR Ms Automap Route Photoshop Scratch Area .ASS Assembler/Disassembler 68HC11 File ASS I/O (programmers utility to pack multiple files into one file) .AST Astound Multimedia File Photoshop Separation Tables Claris Works Assistant File .ASV DataCAD Autosave File Photoshop Selective Color .ASX Metafile (points to an .ASF structured file) Cheyenne Backup Script Video File .AT2 Aldus Persuasion 2.0 Auto Template DCX-AT200 Motion Control Command Language File .AT3 DCX-AT3000 Motion Control Command Language File .ATF Photoshop Transfer Function .ATK Bitmap Image (Andrew Toolkit Raster Object file) [XnView] .ATL Hal/Supernova/Lunar/LunarPlus Screen Readers/Magnifiers PROGNOSIS Atlas Document File .ATM Adobe Type Manager Data File .ATN Adobe Photoshop Action File .ATO Just Burn File (audio CD burner on Compaq computers) .ATR Lightscape Material Library .ATS Attityd Swedish Survey Program .ATT AT&T Group 4 Bitmap (fax) [XnView] .ATW AnyTime Deluxe PIM File [PIM] Attityd Swedish Survey Program .ATX A ZIP-formatted Compressed Archive (Use any ZIP program to open) .AU Music File (various, usually Sun or UNIX) [IrfanView] [Linux Player] .AUD Audio File used by Westwood Studios for various games .AUP ePocrates File .AUT AutoIt Script (automate any windows based task) PocketWear Car Lease Kit Vehicle Data File (Pocket PC) TLG Workplace CD Search File Xitami Webserver Admin Password File (default.aut) GPSMan-autoMapic File (moving-map real-time plotting) Signwave Auto-Illustrator File Descent Manager Mission File Authentication File (various) Interactive Pictures iPIX Format .AUX TeX/LaTeX Auxilliary Reference File ChiWriter Auxilliary Dictionary File .AV Final Draft AV Document File .AVA Avagio Publication .AVB Inoculan Anti-Virus Virus Infected File Avid Bins File Microsoft Chat Character File .AVC Kaspersky Antivirus Toolkit File .AVD Avery Label Pro Data File .AVI Audio Video Interleave File [IrfanView] .AVL ArcView Theme Legend File (GIS-related file) .AVP ArcView Pallet File (GIS-related file) Avid Project File .AVR Audio Visual Research Sound File .AVS Animation File Application Visualization System Format Stardent AVS X Image [XnView] Winamp Advanced Visualization Studio File Avid Settings File .AVX ArcView File (GIS-related file) Avid Extensions File .AW HP AdvanceWrite Text File MS Answer Wizard File Applix Word File .AWB Lavasoft Ad-aware Backup File .AWD Faxviewer Document (AWD Microsoft Fax) [PolyView Viewer] Award BIOS File AWK Language Source Code File .AWE Adobe Acrobat Bookmark XML File .AWF Qui veut gagner des millions Archive [Dragon UnPACKer] Who wants to be a millionaire Archive [Dragon UnPACKer] .AWK AWK Script .AWM Animation Works Movie .AWR Telsis Digital Audio File .AWS StatGraphics Data File .AWX MS DirectX 8.1 .AX DirectShow Filter DivX MPEG-4 DVD Filter [some filters work with Windows Media Player] .AXD Avery Label Pro Re-Index File .AXE Paradigm C++ Integrated Debugger File ChordMaster (Chord Chemistry and Sequencing program for guitarists) MS Autoroute Export File .AXG MS Autoroute Trip File .AXL ArcIMS XML Project File [XML] .AXP GraphStore eCADLite File .AXR Telsis Digital Audio File ElcomSoft Advanced Archive Password Recovery .AXS MindAvenue AXEL Stream File .AXT ZenWorks snAPPshot ASCII Application Object Template Photoshop Replace Color/Color Range .AY AY Chip Sound File (chip used in ZX spectrum and other arcade machines) .AZ WinDVD File .AZZ AZZ Cardfile Personal Information Manager .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .B Limbo Implementation File (Inferno OS) Brainf*ck Program (small programming language) Befunge Program Applause Batch List .B02 ADP Payroll (unverified) .B16 PCO Graphic [XnView] .B1J BookJones .B1N 1st Reader Binary Screen Image .B1S BookSmith .B30 Ventura Publisher Printer Font .B3D 3D Builder File BDE Multipath Movie Digital Viewer .B4 Helix Nuts and Bolts File (Helix Software now part of McAfee) .B5S Numerical Controlled Machine File (Ball-bar?) .B64 Base 64 MIME-encoded File [MIME] .B8 Piclab Raw Graphic File .B&W Atari Black and White Graphics 1st Reader Mono Binary Screen Image Image Lab [XnView] .B_W Atari/Macintosh Black and White Graphic 1st Reader Mono Binary Screen Image Image Lab [XnView] .BAC Backup .BAD Rime Mailer Address File Oracle BAD File Brutus Application Definition File (password cracking) .BAG PMMail Mail Index File OS/2 Netfinity Manager Sysinfo File (adapter.bag) AOL Instant Messenger File Emperor: Battle for Dune Archive [Dragon UnPACKer] .BAK Backup .BAL Ballade Music Score .BAN Sierra Print Artist Banner .BAR dBase Application Generator Horizontal Menu Object .BAS BASIC Language Source Basic Module .BAT Batch Processing (DOS Batch File) .BB Papyrus Database Backup Blitz Basic File Starfleet Battles DOS Game .BB2 XBBS-OS/2, XGROUP, AV and ZTree Archiver Control File .BBC BBC BASIC File .BBL TeX/BibTeX Bibliographic Reference File .BBM Deluxe Paint Image File .BBMA Bonzibuddy .BBP BitBeamer Split File (of the form .??_??.bbp) .BBQ BitBeamer Transfer Queue File .BBS Bulletin Board Sytem Text .BC Sierra Print Artist Business Card .BC3 Fiebdc-3 Format File (Format of Interchange ESTANDAR of Data bases of CONSTRUCTION) .BCC Calendar Creator 8 Collection .BCF ConfigSafe Snapshot Index The Sims (Maxis) 3D Body Mesh File .BCH dBase Application Generator Batch Process Object Datalex EntryPoint 90 Data File Phoenix Software (Datalex) Entry Point 90 Data File .BCK Backup .BCM MS Works Communications File .BCN Business Card Pro Design .BCO Bitstream Fontware File .BCP Borland C++ Makefile .BCW Borland C++ 4.5 Environment Settings .BDB MS Works Dababase File .BDE Borland Database Engine (embedded in many different programs) .BDF West Point Bridge Designer File .BDF Egret Data File X11 Bitmap Distribution Format Backup To CD-RW Backup Definition File .BDG Badge Designer 2000 Photo ID .BDR MS Publisher Border [Buy Office XP at Shop.Microsoft] .BEC Break Even Calculator .BED InfoSnorkel Blue Elephant Definition (define content InfoSnorkel extracts from web page) .BEZ Bitstream Fontware File .BF Brainf*ck Program (small programming language) Befunge Program .BF2 Bradford 2 Font .BFA Blowfish-encrypted File (Extension added to original) [Program List] .BFC Briefcase File .BFF AIX® Backup File Format .BFFM B17 Flying Fortress Game File (link is to support page) .BFL Colin McRae Rally 2 Data File BFLI [XnView] .BFLI BFLI [XnView] .BFM UNIX Font Metrics File .BFX BitFax Document BFX Bitware [XnView] .BG MS Backgammon for Windows Game .BGA OS/2 Graphic Array [XnView] .BGB MS Chat Background Graphic .BGI Borland Graphic Interface .BGL Flight Simulator Scenery File .BGM Jane's Combat Simulations F-15 .BH BlackHole Archive Format File [ZipTV] .BHF pcAnywhere Host File .BHTML BabuHTML Embedded Software File (example use: netMailshar) .BHX Archive File .BI Binary File Progress Database Before Image File .BIB Bibliography Papyrus Database TeX/BibTeX Literature Database .BIC Civilization III Scenario .BID BidMaker 2002 File (software to aid in making bids on jobs) .BIE JBIG File [XnView] .BIF GroupWise Initialization File Image Capture Board Binary Black & White Image Baldur's Gate Archive [Dragon UnPACKer] Planescape: Torment Archive [Dragon UnPACKer] .BIG Chinese (old version) Cartes Michelin [XnView] .BIK BioCharter Profile Backup File Bink Game Video File .BIN Binary File (many) .BIO BioCharter Profile File OS/2 Bios File .BIT Bitmap Image Worms Armageddon Imported Map Worms World Party Imported Map .BIZ Broderbund Print Shop Business Card File .BJF NTI Backup NOW! File .BK Backup LinguAssist File JetFax Faxbook File .BK! Backup .BK$ Backup .BK? Backup (Can be 1 to 9, usually with WordPerfect) .BK1 Bach Preludes and Fugues MIDI akmi Source, Book 1 .BK2 Bach Preludes and Fugues MIDI akmi Source, Book 2 .BKF Moto Racer Archive [Dragon UnPACKer] MS WindowsXP Backup Utility (Note: This is default; can be renamed to any extension.) .BKG Background File (used in many games/programs) UWXAFS Binary Format Data File (absorption data on an energy grid which does not need to be evenly spaced) .BKI Backup Index .BKP Backup .BKS Bookshelf Backup IBM BookManager Read Bookshelf MS Works Spreadsheet Backup .BKU Timeslips Backup .BKW FontEdit Fontset Mirror Image .BLA Blat E-mail (command line E-mail tool written for Windows) .BLB DreamWorks Resource Archive .BLD BASIC Bload Graphics MegaPaint [XnView] VersaPro Block Build Info .BLEND Blender 3D File .BLG Windows Binary Performance Log (W-2000 & W-XP have different formats. To convert click.) .BLK WordPerfect Temp File Lightscape Block Library Alias Wavefront Image Amiga IFF [XnView] VersaPro Block .BLL An extension used by the VBS/European-A worm. If found in the directory C:\STARTUP suspect you are infected with this worm and have your computer checked with anti-virus software! INPRISE Format Language Library (changed to .BTL) .BLT Wordperfect for DOS File Saved AIM Buddy List File .BLZ Bitmap Graphic Twinkle Bulbs Bulb File Emblaze.Creator File Blazon Heraldic Shield Serial Number File [IBM's Drive Fitness Test (DFT) program] .BM Bitmap Graphic .BM1 Apogee BioMenace Data File .BMF Corel Flow Image File [XnView] .BMI Buzz Instrument Blue Martini Import File (eCRM) .BMK Help Bookmark .BMP Windows OS/2 Bitmap Graphics [IrfanView] .BMS Backup Magic Backup Set .BMU Music/Sound File [Open with Winamp or other MP3 player] .BMW Buzz Music File with Waves .BMX Buzz Music File Siemens Mobile Phone Animation .BMZ Demon Stalkers: Raid on Doomfane (old game) .BN AdLib Instrument Bank .BNG [Used by program RANGER.EXE] (Marshalling Yard Calculations) .BNK Adlib Instrument Bank SimCity Game File (reported to be) Bink Compressed Video/Audio File .BNR Binary News Reader File .BNSKIN Beatnik Clock Skin .BOB BobDown Downloading Program [Also see Antibob] Bob Raytracer [XnView] .BOL MS Booasm Compressed Archive Library .BOM Orcad Schematic Capture Bill of Materials File Softshare Delta Business Object Model .BOO Image File Book Compressed Archive File .BOS Brotherhood of Steel Compressed File (renamed ZIP file; use any extractor) .BOT Frogbot Editor (Frog = Quake add-on computer opponent) .BOW Back Orifice 2K Workspace [this is a hacking tool] .BOX Notes Mailbox Lemmings Revolution Archive [Dragon UnPACKer] ThrottleBox Multimedia Viewer Aladdin Knowledge Systems Vbox Helper Application File (software distribution) .BOXR Boxerjam Interactive Game System .BPC Business Plan Toolkit Chart BuildPro File .BPL Delphi Library .BPP MUSICMATCH Burner Plus Project .BPR Borland C++ Builder 6 Project BackupXpressPro Project File .BPS MS Works Document Bulletproof FTP Settings .BPT Bitmap Master File .BPX Truevision Targa Bitmap [XnView] .BQY BrioQuery File .BR Bridge Script The Playa File (link is tentative) .BR3 Bryce 3D Scene File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by Corel) .BR4 Bryce 4 File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by Corel) .BRC Bryce 2 Scene File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by Corel) .BRD EAGLE Board File .BRI Basic Rate Interface File .BRK Brooktrout Fax-Mail File [XnView] .BRO Tree Professional Broadleaf Creator File .BRP Tree Professional Broadleaf Creator Image .BRS Corel Paint Classic File .BRT Brooktrout Fax-Mail File [XnView] .BRU Brutus Restore File (password cracking) .BRW Application file associated with financial institution(s) loan applications .BRX Multimedia Browsing Index .BRZ DbBRZ File (Backup or Restore) .BS Printfox/Pagefox [XnView] .BS_ MS Bookshelf Find Menu Shell Extension .BS1 Apogee Blake Stone Data File .BS2 Basic Stamp 2 Code File (WordPad or BS2-Editor) .BSA BSARC Compressed Archive .BSB SWAT Sub-basin Output File (river basin scale model) MapInfo Sea Chart .BSC Apple II Compressed Archive Source Browser Database Fortran Pwbrmake Object [FORTRAN] Boyan Script MS Developer Studio Browser File .BSK Bryce 4 File .BSP Quake Map Half-life/TFC/CS Map .BST BibTeX Style File .BSU Brindys BriTray (software update) .BSV BASIC Bsave Graphics .BTAB Base Guitar Tabulature [On-line Guitar Archive] .BTL INPRISE Format Language Library (changed from .BLL) .BTM 4DOS Batch To Memory Batch File .BTN ButtonWare File JustButtons Animated Bitmap [XnView] .BTO Baytex Organix! 2001 Language Kit .BTR Btrieve Database File MS Frontpage-related File [Buy Office XP at Shop.Microsoft] .BTS Creative Digital Blaster Digital VCR File .BUD Quicken Backup .BUF WinXL File (Datascope emulation software) .BUG Bug (Problem) File .BUL Holiday Lights Screen Saver Bulb File .BUM Poser Bump [XnView] .BUN CakeWalk Audio Bundle File .BUP Backup DVD Info File PC-Bibliothek Update File CD Indexer Brother Embroidery System File Softcode Tracker Contact Manager Backup (Australian software no longer sold) .BUT Buttons! Button Definition .BUY Movie Data File .BV? WordPerfect Overflow File (Can be 1 to 9) .BVH Biovision Motion File [Format] (Used by Poser and other software) .BVS BVS Solitaire Collection .BW SGI Black and White Image Silicon Graphics Raw RGB File [XnView] .BWB Visual Baler Spreadsheet File .BWI Blindread/Blindwrite .BWR Kermit Beware Bug List .BWS Blindread/Blindwrite .BWT Blindread/Blindwrite [Fantom CD Emulator] CDmage Table of Contents .BWV Business Wave File .BXF Man's Best Friend Software Breeder Exchange Format .BXX blaxxun Contact .BYU Movie File (Shockwave) .BZ Bzip UNIX Compressed File (Open using WinRAR .BZ2 Bzip UNIX Compressed File (Replaces .BZ) (Open using WinRAR .BZF Textures and Other Information (used by various games) .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .C C Program File Check Point Site Configuration for Secure Remote UNIX Compact File Achive Desktop Color Separation Specification Cyan Layer (usually an EPS file) .C?? Winace Compressed File (open with WinRAR) .C++ C++ Source Code .C-- Sphinx C-- Source .C00 Ventura Print File .C01 Typhoon Wave File .C08 Lord Of Destruction Game File (unverified) .C2D IsoBuster File WinOnCd CD Image .C3D Chem3D Chemical File .C3T Chem3D Chemical Template File .C4 JEDMICS (Joint Engineering Data Management) DoD Engineering Data Format [For-pay Viewer] Edmics [XnView] .C4D Cinema 4D (3D Modeling texturing and animation program) .C6 Ashlar-Vellum File .C86 C86 C Program .C-- Sphinx C-- Source code .CA Telnet Server Initial Cache Data File DATAIR FlexPlus Data File .CA1 OzWin CompuServe E-mail/Forum Access Catalog File STABCAL (stability calculation for aqueous systems) File .CA2 STABCAL (stability calculation for aqueous systems) File .CA4 Electronics Workbench Circuit STABCAL (stability calculation for aqueous systems) File .CA7 Beta 44 Job File STABCAL (stability calculation for aqueous systems) File .CAB Cabinet File (Microsoft installation archive) Install Shield v5.x or 6.x Compressed File (not compatible with MS .CAB files) .CAC dBase IV Executable File .CAD Softdesk Drafix CAD File .CAF Southern Company Terrestrial Data Acq .CAG MS Clip Gallery Catalog File .CAL SuperCalc Worksheet Calendar File HTML Calendar Maker Pro DOS Calendar Creator File Cals Raster File [SwiftView] Radiance Function File Format CALS Raster [XnView] .CALS CALS Raster [XnView] .CAM Casio Camera Graphic [XnView] [IrfanView] Camtasia Project/Producer Files (screen recording editor) .CAN Canon Navigator Fax [XnView] .CAP Ventura Caption Network Associates Sniffer Capture File Telix Session Capture Compressed Music File .CAR AtHome Assistant File Carrara Environment NeoBook Cartoon [XnView] .CAS Comma-delimited ASCII File i2's Case Notebook Timeline Analysis Casio Program .CAT dBase Catalog Quicken IntelliCharge Categorization File Cognos Impromptu Database Report OzWin CompuServe E-mail/Forum Access Catalog File Photomatrix PhotoStudio Graphic [XnView] .CAZ Computer Associates Archive .CB MS Clean Boot File Crystal Button File Brief Macro Source Code .CBC CubiCalc Fuzzy Logic System File .CBH ChessBase Chess Database File .CBI IBM Mainframe Column Binary Formatted File .CBL COBOL Program Contextual Browsing Language Viewer (usually JavaApplet) .CBM XLib Compiled Bitmap Fuzzy Bitmap [XnView] .CBT Computer Based Training .CC C++ Program File Visual dBASE Custom Class File dB2K Custom Class File Picture Window's Color Curve File (ASCII text file) .CC1 Chem3D Cartesian Coordinates 1 Briggs Softworks Calendar Commander .CC2 Chem3D Cartesian Coordinates 2 .CC5 Calendar Creator 5.x 6.x File .CCA CC:Mail Archive File Multimedia Fusion File (multimedia game creation) .CCB Visual Basic Animated Button Configuration .CCC Chat Curtain Call Native Bitmap Graphic .CCD CloneCd Related File [Fantom CD Emulator] Vector CAD Program File .CCE Calendar Creator 2 Event File .CCF OS/2 Multimedia Viewer Configuration File Symphony Communications Configuration File Remote Control File (various to include: ProtoProEdit, RAVedit) AudioReQuest Control File .CCH Corel Chart Fabasoft Components .CCL Intalk Communication Command Language .CCM Lotus CC:Mail Mailbox .CCN Vitalize! Game File [Played via IE plug-in] .CCO CyberChat Data File XBTX BTX Graphics File .CCP C Converter Profiles (construction site management) .CCR Chat Room Shortcut .CCS CONKY CeZaR Stribas International .CCT Macromedia Director Shockwave Cast Logic Works Schematic File SIL Hebrew Font System Transliteration Table .CCX Corel Compressed Exchange File .CD cdTree Content List .CD1 DATAIR Cafeteria Document System Data File .CD2 DATAIR Cafeteria Document System Custom Text File .CDA CD Audio Track .CDB Turbo C Database Clipboard File One Page from a ROM With a View Project File CardScan Database Nokia 9210/9290 Contact Database (Nokia runs Symbian) SymbianOS Contact Database File PowerDesigner Conceptual Model Backup File .CDC Chromeleon Driver Configuration Plugin Nero File (CD burning/design software) .CDD Chromeleon Device Driver Claris Draw v 1.2 Document .CDE Honeywell Hybrid Control Designer (HC900-x Industrial Controllers) .CDF Comma Delimited Format Cyberspace Description Format MS Channel Definition Format InstallShield Components Definition File NetCDF Graphic File .CDG DART Karaoke Studio CD+G File (contain only song lyrics and synchronization data) .CDI Phillips Compact Disk Interactive Format Disc Juggler File (CD-ROM data) .CDJ Disc Juggler File (CD-ROM data) .CDK Atari Calamus Document .CDKEY Protocol Used in Communicating from MediaRemote Server to PC MediaRemote Plug-in (ASCII text) .CDL CaseWare Working Papers Document Link SignLab Vector Graphic .CDM PowerDesigner Conceptual Model File Visual dBASE Custom Data Module .CDP CD/Spectrum Pro .CDR Corel Vector Graphic Drawing [XnView] Raw Audio-CD Data Sound File [Linux Player] .CDS ChemDraw Stationery Document .CDT Corel Draw Template STABCAL (stability calculation for aqueous systems) File .CDU CDU Paint [XnView] .CDX Compound Index [File Structure] Corel Draw Compressed Drawing MS Visual Foxpro Index Active Server Document ChemDraw Chemical Structure Microstation Cell Library Index .CDXL Old Amiga Movie Format .CDXML ChemDraw XML ChemDraw Format .CDZ ROM With a View Project File .CE FarSide Computer Calendar File Computer Eyes, Digital Vision [XnView] .CE1 Computer Eyes, Raw [XnView] .CE2 Computer Eyes, Raw [XnView] .CE3 Calendar Creator 3.x 4.x Event List .CEG Continuous Edge Graphic Tempra Show Bitmap Graphic .CEL Autodesk Animator Graphic CIMFast Event Language File Kiss Paper Doll File Microstation Cell Library Kiss Cel [XnView] Lumena CEL [XnView] .CEM Empire Earth Game File .CEN Master Tracker Financial Analysis .CER Certificate File Sierra Print Artist Certificate .CEV Software License Tracking Tool (CERTAUTH.CEV) LOUT Character Encoding File (High-Level Language For Document Formatting) .CEX The Currency Exchanger Rate File INMOS Transputer Development System Occam User Program ThumbsPlus File (Progressive Multi-image JPEG file) .CF Imake Configuration File .CF4 Catfish File Manager Support File .CFB Comptons Multimedia File .CFC Cold Fusion File .CFF Capabilities File for FOUNDATION(tm) Fieldbus H1 (31.25 kbit/s) .CFG Configuration (various) .CFH Capabilities File for FOUNDATION(tm) Fieldbus HSE (100 Mbit/s) .CFL Corel Flowchart File .CFM Corel FontMaster Cold Fusion Template File Visual dBASE Windows Customer Form .CFN Atari Calamus Font Data File .CFO TCU Turbo C Utilities C Form Object .CFP Complete Fax Portable Fax File .CFR IBM Configurator Report (if you don't have the program ask the sender to export to .RTF for you) .CFW ChemFinder Form .CGA Ventura CGA Screen Characters .CGI Common Gateway Interface Script .CGM Computer Graphics Metafile .CGP NetCaptor CaptorGroup .CH Clipper Header OS/2 Configuration File .CH3 Harvard Chart (Harvard Graphics taken over by Serif) .CH4 Charisma 4.0 Presentation .CHA Adobe Pagemaker Kerning Data .CHAT PIRCH98 Chat File .CHD FontChameleon Font Descriptor ChartFX File .CHF pcAnywhere Remote Control File .CHI Chiwriter Document Help File Index (typically used when the Help file will stay on a CD-ROM -- .CHI speeds access to the info) .CHJ Help Composer Project .CHK CHKDSK/SCANDISK Output WordPerfect Temp File .CHL Chromeleon Channel Raw Data Configuration History Log .CHM Compiled HTML Help ChemDraw Chemical Structure (old format) .CHN Ethnograph Data File .CHP Ventura Publisher Chapter .CHQ Help Combined Full-text Search File (produced when multiple .CHM files are merged) .CHR Character or Font File .CHS Corel WP Chart Style ATI Radeon Video Driver File .CHT Cheat Machine Data File ChartViewer dBase Interface File Harvard Graphics Vector File (Harvard Graphics taken over by Serif) ChartFX Template File .CI CitectSCADA File .CIF Ventura Chapter Information CalTech Intermediate Graphic Easy CD Creator Image pcAnywhere Caller File Ventura Converted Image File Colombo Ipermedia File Chip Layout Information Crystallographic Information File .CIL Clip Gallery Download Package .CIM Sim City 200 File CompuApps Drive Backup Image CIMEX Cimpack Design Drawing File .CIN OS/2 Change Control File Cinetitler Digital Screen Subtitling Kodak Cineon [XnView] .CIP Ghost Keylogger File .CIR SuperMax E-CAD Save-File Command PSpice File Flash Color Table .CIS CheckInbox File .CIT Intergraph Scanned Image [XnView] .CIX TCU Turbo C Utilities Database Index .CK1 iD/Apogee Commander Keen 1 Data File (.CK1 to .CK6) .CKB Borland C++ Keyboard Mapping File .CKD CADKEY GraphX File Format (ver 2 and above) .CKP Ingres Checkpoint File .CKT Crocodile Clips (Electronic design/physics) .CL Generic LISP Source Code .CL3 Easy CD Creator Layout File .CL4 Easy CD Creator Layout File .CL5 Easy CD Creator Layout File .CLA Java Class File (usually .CLASS but can be shortened) CLARION for DOS .CLASS Java Class File .CLB ICQ Contact List MS Office XP Developer Code Librarian cdrLabel Compact Disc Label .CLF ListPro File .CLG Disk Catalog Database Maxagrid CTM Log File (text format) .CLK Corel R.A.V.E. Animation File .CLL Crick Software Clicker File OzWin CompuServe E-mail/Forum Access Custom Library Search .CLO Cloe Ray-Tracer [XnView] .CLOE Cloe Ray-Tracer [XnView] .CLP Windows Clipboard/Picture [IrfanView] Quattro Pro Clip Art CLIPS/wxCILPS File (C Language Integrated Production System) Clipper 5 Compiler Script PC Paint/Pictor Page [XnView] GoDot [XnView] .CLR WinEdit Colorization Word List 1st Reader Binary Color Screen Image PhotStyler Color Definition FileMaker Spelling Dictionary .CLS Visual Basic Class Module C++ Class Definition .CLV Aladdin Knowledge Systems Vbox Current Language File (software distribution) .CLW Microsoft Visual C++ Class Wizard File CLARION Database (DOS & Windows) [CLARION Magazine] .CM Craftman Data File .CM2 Curious Labs Poser Camera File .CM4 ClipMate Data File .CMA Applix TM1 Database File (text) .CMB Chromeleon Backup Archive .CMC PowerFront File (part of ShopMind) .CMD OS/2, WinNT Command File DOS CP/M Command File dBase II Program File 1st Reader External Command Menu .CMF Creative Music File Corel Metafile .CMG Chessmaster Saved Game .CMK Card Shop Plus File .CML Cheat Machine Library File (Windows) PADGen Company Info File .CMM CEnvi (ScriptEase:Desktop) Batch File .CMO Virtools Behavioral Server Composition .CMP Leadview Bitmap Discorp CMP Image [XnView] Open Access File Address Document JPEG Bitmap CorelDRAW Postscript Printer Header Route 66 Address Document MS Word for DOS User Dictionary .CMQ Culturemetrics (Personality Profile Analyser) .CMR MediaPlayer Movie .CMT Culturemetrics (Personality Profile Analyser) Chinon ES-1000 Digital Camera [XnView] .CMU Carnegie Mellon Univeristy Stereo Raster Image CMU Window Manager [XnView] .CMV Corel Move Animation .CMW MS Custom Maintenance Wizard File COM-Watch (data analyser) .CMX Corel PhotoPaint Image [XnView] Corel Presentation Exchange Image [XnView] The Sims (Maxis) 3D Body Mesh Data Apple Viewer File .CNC CNC General Program Data Click 'n Create File .CND ControlDraw File Embroidery Design File [possibly read with Melco Sizer Software] .CNF Configuration (various) SpeedDial .CNM Windows Application Menu Options and Setup File .CNQ Compuworks Design Shop File .CNREG EULANDA® Warenwirtschaft (ERP) Configuration Information .CNREP EULANDA® ERP System Report Template .CNS W2K Client Connection Manager Export File .CNT Help File Contents (and other contents needs) .CNV MS Word Data Conversion File WS_FTP Pro Upload Conversion File Data WordPerfect Temporary File Canvas versions 6, 7, 8 .CO Cult3D ActiveX Player Application .COB COBOL Program File Caligari Truespace Format TrueSpace2 Object .COD Code List Compiler Program Code .COD Multiplan Data File dBase Template Source File SWAT Input Control File (river basin scale model) FORTRAN Compiled Code [FORTRAN] Video Text File .COK Carmageddon Patch File .COL Autodesk Color Palette Multiplan Spreadsheet Lotus Notes Import Column Description File .COM Command (Executable file) .COMPAT Likely a text file (e.g., README.COMPAT) .CON Knowledgeware Consolidation File Tree Professional Conifer Creator File Simdir Configuration File .CONF IRC Related Configuration File (IRCDs or EggDrops) Linux Configuration File (also UNIX) .CONFIG MS .NET Application Configuration Information .COO Fabasoft Components .COP Tree Professional Conifer Creator Image File .COR Protein Structure File Web GPS Correction Server Export File WMOVIEC Input File .COS Scarlett Expert System Compiler Query File (Scarlett is not presently available) .COV Fax Cover Page (Win2000 Cover Page Editor) .CP CompuMedic Database (medical billing software) .CP8 CP8 256 Gray Scale Image [XnView] .CPA Colasoft Capsa (network sniffer) .CPD Fax Coversheet Corel PrintOffice File Complaints Desk Script .CPE Fax Coversheet .CPF Complete Fax File .CPG 3dize® Cool Page File .CPH Corel Print House Image .CPI Code Page Information ColorLab Image Calamus [XnView] .CPJ CeQuadrant CD Project Commotion File (compositing software tool) .CPL Control Panel Extension Corel Color Palette Compel Presentation .CPN Age of Empires II Campaign File .CPO Corel Print House File .CPP Borland C++ Builder 6 CA-Cricket Presents Presentation Maya File .CPR Corel Presents Presentation Knowledge Access Graphics INMOS Transputer Development System Occam Program Code Fold .CPS Antivirus Checksum File Central Point PC Tools Backup Colored PostScript File Classroom Performance System File .CPT Macintosh Compressed File Corel Photo-Paint Image [XnView] [IrfanView] Jasc After Shot (Image Expert 2000 taken over by Jasc from SierraImaging) dBase Encrypted Memo CA Cricket Presents Template .CPT6 Corel Photo-Paint Image [IrfanView] .CPX Control Panel Applet Code Page Translation File CryptaPix Encrypted Image Corel Presentation Exchange Compressed Drawing .CPY Copy Books Data File Atari Ramdrive CPY Commands Flexus COBOL Definitions (function, element and value properties associated with a control) .CPZ COMPOZ Music Text .CR CRiSP Source Code .CR2 Curious Labs Poser Character File .CR4 STABCAL (stability calculation for aqueous systems) File .CR7 STABCAL (stability calculation for aqueous systems) File .CRA Personal Craft Factory File (no longer supported--GraphicCorp bought by Corel) .CRD Cardfile (Windows 3.x Database) Guitar Chord File [On-line Guitar Archive] (Usually an ASCII text file) .CRF Zortech C++ Cross-Reference File Database Cross-Reference File OM2Cipher Recipient File Sierra Print Artist Craft System Shock 2 Archive [Dragon UnPACKer] Thief 2: The Metal Age Archive [Dragon UnPACKer] Thief: The Dark Project Archive [Dragon UnPACKer] .CRG Calamus [XnView] .CRH MS Golf Image File Links Games Course File .CRK Crack File (differences between original and cracked files) [Need proper version of CRK.EXE to open] .CRL Certificate Revocation List .CRM Capital Research Vendor Bid System .CRP dBase Encrypted Database Visual dBASE Custom Report Corel Presents Run-Time Presentation .CRS WordPerfect 5.1 for Windows File Conversion Resource Links Games Course File Gold Game Course File .CRT Certificate File Oracle Terminal Settings Info UNIX Crontab File (not a required extension for Crontab) .CRU CRUSH Compressed Archive .CRW Canon Raw Format (Image) [XnView] [ACDSee 4.0] .CRX Links Games Course File .CRY Crypto Chat II Encrypted Notebook-content .CRZ Links Games Course File .CS C#.NET Source File .CSA Comma Deliminated Text Ultimate Ride Roller Coaster .CSB Corel Photo-Paint Script CircuitSoft Viewer (a module of EMSI Complete) - (Unverified) .CSC Corel Script .CSD Bitstream Fontware File Chemsoft® MSDS Database File Embroidery Design File [possibly read with Melco Sizer Software] .CSF Van Dyke's CRT/SecureCRT Script File GeoMedia Coordinate System File .CSG Statistica Graph File .CSH Hamilton Labs C Shell Script File .CSI Cyberautograph Signed Item .CSK Claris Works .CSM Borland C++ Symbol File Borland C++ 4.5 Precompiled Header Kodak DC265 Camera Script .CSN Dreamweaver MX's Snippet .CSP PC Emcee On-Screen Image CaseWare Working Papers Script Page .CSQ Foxpro Queries .CSS Hypertext Cascading Style Sheet Stats+ Datafile Statistica Datasheet .CST Macromedia Director Cast File .CSV Comma-Separated Variables CompuShow Adjusted EGA/VGA Palette .CT Scitex CT Handshake Bitmap [XnView] Iris CT Graphic [XnView] .CT0 Maxagrid CTM File Being Processed (text format) .CT1 Maxagrid CTM File Successfully Processed (text format) .CT2 Maxagrid CTM File Unsuccessfully Processed (text format) .CTB NoteTab Clipbar .CTC PC Installer Control .CTD Cobra Track Dump (COmBined Reconstruction for Atlas) Cardtable File (text file) Marine Data File (e.g., automatic float data) Simpsons Cartoon Studio Export File .CTF TIFF Compressed File WhereIsIt Catalog Symphony Character Code Translation MGI PhotoSuite 1.0/8.0 Album File Calculator Text Format .CTG Cartridge Definition File ChessBase Opening Book Canon Powershot Pro 70 Info File .CTL Setup Information (various) User Control (various) .CTM FreeBSD Content Management File Java Charge Transaction Matrix File Crazytalk Talking Animation File Maxagrid CTM File (text format) SDR99 Speech Recognition Task Time Marked Conversation Input Content Delivery Service (Web site pending as of Feb 2002) .CTP American Greetings Greeting Cards ChemDraw Template .CTT Hotmail List of E-mail Contacts LabView File .CTX Compressed Text Visual Basic User Control Binary File Pretty Good Privacy (PGP) Ciphertext File MS Online Course Text Chinese Character Input File .CTY SimCity City File .CUB OLAP Cube File (definition for SQL Server, any OLE DB, or ODBC-compliant database) .CUE MS Cue Cards Data Description File for a CD-Image [Fireburner.com or Goldenhawk.com] or [Fantom CD Emulator] .CUF Turbo C Utilities Form Definition .CUL IconForge/ImageForge Cursor Library .CUP OzWin CompuServe E-mail/Forum Access Catalog Library Update .CUR Cursor Microangelo [IrfanView] .CURSOR Sun Icon/Cursor [XnView] .CURXPTHEME Cursor XP File (changes look & function of mouse cursor) .CUT Dr. Halo Bitmap Graphic [XnView] INMOS Transputer Development System Occam Utility Package Utilitaires (multiple utilities) .CV Corel Versions Archive MS CodeView Information .CV4 Codeview Colors .CV5 Canvas version 5 .CVA Compaq Diagnostics .CVG Image File .CVP WinFax Cover Page Portrait [XnView] .CVR WinFax Cover Sheet ElectraSoft Fax Cover Sheet .CVS Canvas Drawing File Outlook Express File Sound File [Linux Player] .CVT dBase Converted Database .CVW Codeview Colors .CW3 Crossword Construction Kit Puzzle Group Claris Works Win 3 Document (now Filemaker) Chem Draw Molecular Structure (Lewis structures, orbitals and lab apparatuses) .CWB WebNote Document .CWD StarDraft CWAD File (StarCraft Editor) .CWE Crossword Express .CWK Claris Works Data also see AppleWorks .CWS Claris Works Template also see AppleWorks .CWW Crossword Weaver File .CXE Common XML Envelope .CXT Macromedia Director Protected Cast File Vegas Jackpot Gold Game Data File .CXX Zortech C++ Program .CYN Cynex Root55 Program Extension .CYP Cypherus Encrypted Archive .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .D Dialect Source Code File D Programming Language Source Code File .D_1 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library) .D_3 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library) .D$W MindStor Driver (digital wallet) .D00 Ganbatte! Winamp Plug-in .D01 Ganbatte! Winamp Plug-in Note: .D00 and .D01 formats created by Jens-Christian Huus of the Vibrants and contains OPL2 music data. .D11 Macro Mania Data File .D2D 3D Fassade Plus 2D/3D Object File .D2I Shadowmaster Diablo II LOD Character Editor File .D2S Diablo II Character and Equipment File .D2V DVD Ripper File .D3D CorelDream 3D File Direct3D File .D3F MS MechCommander 2 Encyclopedia .D64 Commodore 64 Emulator Disk Image .D8A AmBiz Productivity Pak Catalog .DAD Chromeleon Channel Raw Data .DAF OM2 911 Xchange Version 3 & 6 Document .DAN ATI Radeon Video Driver File .DAO Windows Registry Backup IsoBuster File .DAP Omnis5 Application File MS Access Data Access Page [Buy Office XP at Shop.Microsoft] .DARBY TheWord & Bible Companion Darby's Bible Translation Bible .DAT Data (multiple programs) Note: RDXR020305.DAT is Morpheus adware. Kill this and others with Ad-aware. WordPerfect Merge Data (also possibly) MPEG File Mitsubishi DJ-1000 and Photorun Native Format Gunlok Archive [Dragon UnPACKer] Nascar Racing Archive [Dragon UnPACKer] SPOT Graphic [XnView] SHARP MZ-series Emulator RAM-Disk File .DAWN Experimental File Format (.DAWN) .DAZ Poser 3D File .DB Paradox Database Progress Database Solid Database WindowsXP Thumbnail Database ANSYS Database SmartWare Office Pac File (requires login) Oracle Database .DB$ dBASE Temporary File Clarion Modula-2 Debug Info .DB2 dBase II File .DB3 dBASE III File .DBA DataEase Data File DarkBASIC File .DBB ANSYS Database Backup Mopheus Music File .DBC MS Visual Foxpro Database Container PROGNOSIS Database Collection Document File .DBD Clarion Modula-2 Debug Info Business Insight Data Oracle Record Type .DBF Database (multiple programs) [started as dBASE] [File Structure] Oracle 8.x Tablespace File ArcView Shape File (GIS-related file) .DBG MS C++ Symbolic Debugging Info Oracle Generator File .DBI Photo Soap2 File .DBK dBase Database Backup Orcad Schematic Capture Backup File .DBL WindowsXP Product Activation File (if on WPA.DBL in the System32 folder) .DBM Cold Fusion Template DataBoss Menu Template DataEase Data File OzWin CompuServe E-mail/Forum Access SYSOP File .DBO dBase IV Compiled Program File .DBOOK Pocket Diary Text .DBQ Paradox Memo .DBR Comdial VMMI Database .DBS SQL Format Database Word Printer Description File .DBT Database Text File [dBASE] [File Structure] Oracle Template Foxbase Memo .DBV Flexfile Memo Field File .DBW DataBoss Database File .DBX Database (multiple programs) DataBeam Image MS Visual Foxpro Table .DC DesignCAD CAD File .DC2 DesignCAD CAD File Kodak DC25 Digital Camera File DC2-PC Motion Control Command Language File .DC5 DataCAD Drawing File .DCA Visual Basic Active Designer Cache IBM DisplayWrite Document Content Architecture Text File D-PAS Portfolio Manager File [Education about D-PAS] .DCB Concordance Database Control Block .DCD Document Content Description File FORTRAN Data File [FORTRAN] INMOS Transputer Development System Occam Object Code .DCF Design Rule for Camera File Systems File DynSite Configuration File Dyadic Data File Disk Image File .DCL DumpSec DesignComposer Addition to Layout Knowledge Base .DCLST DC and DC++ Direct Connect [File sharing network using DC++] .DCM DCM Module Format Dicom [XnView] .DCP Delphi Compiled Packages OS/2 Data CodePage .DCR Shockwave File Kodak Proprietary Image Format .DCS Quark Desktop Color Separation Specification ACT! Activity Data File .DCT Dictionary (various) MS Visual Foxpro Database Container .DCU Delphi Compiled Unit .DCV DriveCrypt Volume .DCW Draft Choice for Windows .DCX FAX Image [IrfanView] ElectraSoft Fax PC-Paintbrush File [SwiftView] Bitmap Graphics [IrfanView] Macros MS Visual Foxpro Database Container .DD Macintosh Compressed Disk Doubler Archive C64 Doodle [XnView] .DDB Device-Dependent Bitmap Graphics File Design Database File (database definition file) [MS Access???] INMOS Transputer Development System Occam Debugging Info Protel 99SE Design Database File .DDATA Pocket Diary Text File .DDE Dynamic Data Exchange .DDF BTRIEVE Data Dictionary File (allows other programs to access data) Bitstream Fontware File Doom Definition File Music Library File .DDI DiskDupe Image Disk Doubler Image .DDL MS Data Definition Language File (SQL Server Query Analyzer) .DDM Intelliware Data Modeller (Data Mapping and Aliasing) .DDP OS/2 Device Driver Profile File Delphi 6 File .DDS INMOS Transputer Development System Occam Compiler Descriptor Photoshop Compressed Textures .DDX Juno "Get" File Device Data Exchange Format File (text CAD design exchange format) .DDW CSPro File (combined IMPS and ISSA Census Processing System) .DE MetaProducts Download Express Incompletely Downloaded File .DEB DOS Debug Script Debian Linux Package .DEC VersaPro Declaration File .DESK Card Deck File .DESKLINK MS Windows Explorer Desktop Controls .DEF Definitions Defaults SGML Tag Definition Modula-2 Definition Module File SmartWare II Data File C++ Definition 3D Fassade Plus Define Module File Geoworks Assembly Header File .DEI Gerber Design Engineered Interface .DEL Data .DEM Descent Demonstration USGS Map Digital Elevation Model File (GIS-related file) Half-life Game File .DEP Setup Wizard Dependency .DEPLOY DeployMaster Setup Script .DER Certificate File .DES Description Text Tribes 2 Game File Quickbooks Template Pro/DESKTOP File Interscope BlackBox File (encryption program) .DEU ATI Radeon Video Driver File .DEV Device Driver Device Independent TeX LaTeX File .DEX WinGlucofacts File (diabetes management software) .DEZ DES Encrypted Zip File .DF Lightscape Parameters .DF1 Omnis7 and Omnis Studio Database File (also .DF2, .DF3, etc.) .DFC Voicemail File (Trio Voice Communications and maybe others) .DFD File Flow Diagram Graphic .DFF Digital Animation Format Grand Theft Auto 3 Export Format .DFI Digifont Outline Font Description .DFL Signature Default Program Settings .DFM Borland C++ Builder 6 Form Borland Delphi Form File Flow Diagram Model .DFP Stabilogram Diffusion Analysis File (Requires MatLab) Digital Fusion Plug-in .DFS Delight Sound File .DFT Fakt2000 File SolidEdge CAD File Workshare Synergy File PC Draft File .DFV Word Print Format Template [Buy Office XP at Shop.Microsoft] .DG Autotrol Graphics .DGC TurboTax-related File .DGK Delcam Powershape/Powermill (3D CAD) .DGN Microstation CAD Drawing File Intergraph Graphics Dragon 32 Emulator .DGO Dimitrius Settings File (Dimitrius is program author) .DGR Fax Page (MS Outlook Express) DART Pro 98 File Group Details Keeptool ER Diagrammer .DGS AT Advanced Diagnostics File .DH Geoworks Dependency Information File .DHE MS Help Workshop Dialog Box Help Editor Document .DHP Dr. Halo PIC .DHT Gauss Data File .DIA Computer Support Corp Diagraph Graphics File DIA Drawing .DIB Device-Independent Bitmap Graphic [IrfanView] .DIC Dictionary (various) .DIF Data Interchange Format DIFF Command Output (patch script) .DIG Text Document Digilink Format Sound Designer Audio File .DIL DesignComposer Input DIL Script .DIN DataEase File ADC Labs eWave File (broadcast automation software) .DIP Graphics File .DIR Procomm Plus Dialing Directory Macromedia Director File DEC VAX Directory Worms Armageddon Archive [Dragon UnPACKer] .DIS DKB Ray Tracer File [XnView] DATAIR Data Import Specification Layout File VAX Mail Distribution File Corel Draw Thesaurus .DISCO MS .NET Web Service Discovery File .DIT MS Win2000 Active Directory Schema .DIVX Movie Encoded with DivX-codec .DIZ Description In Zip File .DJE MattBatt iAM-player .DJV DjVu File [XnView] .DJVU DjVu File [XnView] .DKB DKBTrace Ray-Traced Graphics File .DL Animation File (this appears to be associated with glifomon.zip, a probable porno file) Masked .DLL File (often used by malware to hide .DLL files from virus scanners [e.g., Sub7]) .DL_ Compressed .DLL File in an Install Archive .DL4 Lindab Dimsilencer File .DLC Echelon HQ Configuration File Model Dislocation File 3D Studio Max Animation Controller File (Character Studio) .DLD Lotus File .DLE Macromedia Designer 3D Translator File (Also 3D Studio Max) .DLF Belkin Router Firmware Update .DLG Dialog Resource Script C++ Dialogue Script Infinity Engine Game Dialog File Digital Line Graph (U.S. Geological Survey geographic database) .DLK INMOS Transputer Development System Occam Compiler Link Info .DLL Dynamic Link Library CorelDraw Export/Import Filter .DLM Dirty Little Helper Cheat File Dynamic Link Module ASCII Delimited File (sometimes used in voting systems) 3D Studio Max Character Studio .DLS Downloadable Sounds (Interactive Music Architecture) Norton DiskLock Setup File ADAPTA DLS/32 Supply Chain Planning (ASCII file with general number data) dataLive Database Engine File .DLU Dirty Little Helper Update File .DM2 Quake 2 Demo File [Viewer] .DM3 Quake 3 Arena Demo File [Viewer] .DM_48 Quake 3 Arena Demo File [Viewer] .DM_57 Return to Castle Wolfenstein Demo File [Download site] .DM_59 Return to Castle Wolfenstein Demo File [Download site] .DM_66 Quake 3 Arena Demo File [Viewer] .DM_67 Quake 3 Arena Demo File [Viewer] .DMC Medical Manager DML System Compiled Script .DMD Visual dBASE Data Module dB2K/dQuery Web DataModule OS/2 Warp Device Manager Driver .DME Medical Manager DML System Data Merge .DMF Delusion/XTracker Digital Music File Packed Amiga Disk Image .DMG Macintosh OS X Disk Image File (Treated like a real disk) .DMK Digimask File (3D human faces) .DML Darn! Shopping! Mall File Medical Manager DML System Script .DMO Derive Demo .DMP Dump (various) INMOS Transputer Development System Occam Core Dump .DMS Amiga DISKMASHER Compressed Archive (see ADF) [Amiga Forever] .DMT Delcam Machining Triangles (3D CAD) .DMX Medical Manager DML System Index for Custom .DME Files ProTrader Database .DN8 Blue Martini UTF-8 Encoded DNA File (eCRM) .DNA Blue Martini DNA File (eCRM) .DNA.XML Blue Martini XDNA File (eCRM) .DNC Machine Tool Communications .DND ClustaW Tree File .DNE Darn v5+ (Windows) Events List Netica Bayes Net File .DNG Dungeon File (created by ID software) .DNI realMyst 3D Archive [Dragon UnPACKer] .DNL DigitalWebBook Electronic Book (requires installation of DigitalWebBook plug-in) netMod Modem Firmware Upgrade File .DNS DynSite Plug-in File .DO Stata Batch Analysis File DigitalOutrage Hosting Control Panel Info .DOB User Document Form File .DOC Document or Documentation (many programs/formats) MS Word Document [Buy Office XP at Shop.Microsoft] DisplayWrite 4 File .DOCHTML MS Word HTML Document [Buy Office XP at Shop.Microsoft] .DOCMHTML MS Word HTML Document [Buy Office XP at Shop.Microsoft] .DOF Racer 3D Geometry File .DOG Laughing Dog Screen Saver .DOH Geoworks Dependency Information File .DOL D-PAS Portfolio Manager Flexible Benchmarking Analysis File [Education about D-PAS] .DOO Atari Doodle [XnView] .DOP Digital Orchestrator File .DOQ Digital Orthophoto Quadrangle (digital aerial photo) .DOQQ Digital Orthophoto Quarter Quadrangle (smaller digital aerial photo) .DOS Text File/DOS Specification Info 1st Reader External Command File Network Driver File .DOT MS Word Document Template [Buy Office XP at Shop.Microsoft] Corel Lines-Definition .DOTHTML MS Word HTML Document Template [Buy Office XP at Shop.Microsoft] .DOX Text File MultiMate Document User Document Binary Form File .DOZ VENDINFO Description Out of Zip File .DP Daily Planner Calendar File DataPhile Data File .DPA Serif DrawPlus Animation .DPC DiscPlay Collection File Delphi Package Collection File .DPJ DeskProto CAM Project File .DPK Delphi Package File .DPL Borland Delphi 3 Packed Library Digital Photo Librarian Database .DPP Serif DrawPlus Drawing .DPR Borland C++ (or Delphi) Default Project .DPS DivX XP Skin (.ZIP file format) .DPT Publish-It! Publication File .DPX Digital Moving Picture Exchange [XnView] .DPY Realpolitik Saved Game PROGNOSIS Display Document File .DQA itaz doQument File .DQB D-PAS Portfolio Manager File [Education about D-PAS] .DQD itaz Default doQument Database .DQY MS Excel ODBC Query File [Buy Office XP at Shop.Microsoft] .DR9 Directory File .DRC Orcad Schematic Capture Design Rules Check Report File DriveCrypt Container File (Note: This extension was changed to .DCV due to a WinXP conflict.) Borland Delphi Compiled Resource File .DRES Diagnosis Results .DRJ Deraj Data File .DRL DocObject Resource Locator .DRM Steinberg Cubase Drum File .DRN Darn for DOS .DRS WordPerfect Driver Resource Age of Empires 2 Archive [Dragon UnPACKer] .DRV Device Driver .DRW Drawing (various) Micrografx Vector Graphic Pro/E Drawing .DRX Adobe Photoshop Tutorial .DRZ Draz Paint [XnView] .DS Chemisty Software PhotoMax Drive HP Officejet T Series All-in-One TWAIN File .DS4 Micrografx Designer Graphics (ver 4) .DSA DasyTec DASYLab File .DSB DasyTec DASYLab File .DSC Oracle Discard File Nikon Coolpix Disk Identification File dpkg-source (info needed help unpack Debian source archives) .DSCE Diagnosis Scenario .DSD DataShaper Database File Document Structure Definition File .DSES Diagnosis Session .DSF Micrografx Designer PC-TRUST Document Signer (Extension means file is signed) Delusion/XTracker Digital Sample .DSG Doom Saved Game .DSH Dashboard PDA Wallpaper .DSI Digital Sound Module Tracker Format (unverified) R-Studio Hard Disk Scan Results File .DSK Borland C++ or Turbo Pascal Project Desktop File Novell Driver File Lotus Notes Design Elements SHARP MZ-series Emulator File .DSL Lingvo User Feature Dictionary .DSM Delphi Symbol File Digital Sound Module Tracker Format Dynamic Studio Music Module .DSN ODBC Data Source SureThing Office Labeler (formerly DesignExpress) Document Object System Designer Design Orcad Schematic Capture Schematic File .DSP Signature Display Parameters Dr. Halo Graphic Screen Driver MS Developer Studio Project .DSQ Corel QUERY File DASYLab Worksheet Sequence .DSR WordPerfect Driver Active Designer File .DSRES MS Dungeon Siege Texture File .DSS Digital Soup Digital Sound File DCC Active Designer File Digital Speech Standard File (Voice Recorders & IBM's ViaVoice) .DSST ConsumerPoint File (CACR Marketing) .DST PC-RDist Distribution File Embroidery Machine Stitch File (VeePro) [possibly read with Melco Sizer Software] .DSW MS Developer Studio Workspace Borland C++ Desktop Settings .DSX Active Designer Binary File .DSY PC Draft Symbol Library .DSZ Embroidery Machine Stitch File (VeePro) .DT_ Macintosh Data File Fork .DTA Data (Various) Stata Binary Saved Datasets Hidden & Dangerous Archive [Dragon UnPACKer] .DTB DesignTools PCB Design and Make (printed circuit design - common in UK schools) .DTD SGML Document Definition File DesignTools 2D Design (vector drawing - common in UK schools) .DTEA Diagnosis Template Archive .DTF Q&A Database MS Exchange Header File (Used when sending to Lotus Notes) .DTL Hal/Supernova/Lunar/LunarPlus Screen Readers/Magnifiers .DTM DigiTrekker Module Softshare Delta Translation Map .DTP SecurDesk! Desktop Timeworks Publisher Text Document Publish-It! Publication Pressworks Template File .DTQ Database Tools Query .DTS Digital Surround Audio File Format MS Data Transformation Services (Data Transformation Packages used by MS SQL Server) .DTX LaTeX Source and Documentation Archive E-Book File DocuTech Print6 Engine File (Prints DocuTech Closing Documents) LithTech Model Texture File .DUN Dial-Up Network .DUP Duplicate Backup .DUS Readiris Font Dictionary .DV DESQview Script Digital Video File .DVB Visual Basic for Applications Macro Project .DVC Lotus File .DVF DV Studio Camcorder Graphics File .DVI TeX Device Independent Document .DVP DESQview Program Information AutoCAD Device Parameter .DVR Device Driver .DW2 DesignCAD Drawing File .DWC Compressed Archive .DWD DiamondWare Digitized File .DWF Autodesk WHIP! Drawing Web File MS WHIP autoCAD REader Drawing Web File .DWG AutoCAD Drawing Database Drafix Drawing .DWI Dance With Intensity (dance simulator) .DWK Locked DWG File .DWN Cisco Download File (usually a system update) Firmware Update File (several) Experimental File Format (.DAWN) .DWP Dweep Game Levels DeScribe Document File .DWS Dyadic Workspace File AutoCAD Standartization File .DWT AutoCAD Template/Prototype File Macromedia Dreamweaver Template File Demon's World Game Texture File .DWY Dwyco Video Clip .DX Document Imaging File Digital Electric Corporation (DEC) Data Exchange File Deus Ex File .DXB Drawing Interchange Binary .DXF AutoCAD Drawing Interchange Format .DXL Dapyx MP3 Explorer (MP3 database organizer) DOORS Extension Language .DXMAX Oozic File .DXN Fujitsu dexNet Fax Document .DXPACK DesktopX Object (customizes the Windows Desktop) .DXR Vegas Jackpot Gold Game File .DXTHEME DesktopX Theme File (customizes the Windows Desktop) .DXR Macromedia Director Protected Movie File Dependable Strengths Administrator Resources (Macintosh) Green Building Advisor File .DYN Lotus File .DZ Dzip Compressed File .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .E Specman Testbench E-program Source File .E00 ArcInfo Coverage Export File (GIS-related text file) .E01 Encase Forensic Software .E2 thinkdesign CAD Design .E3 thinkdesign CAD Design .E48 Emu48 HP48 Emulator File .E78 IBM 3270 Terminal Emulator Screen Layout Definition .EAC EmEditor Auto Completion File .EAF Aframe File (suite of generic testing and assessment software) MicroEmacs Abbreviation File Format FRAGSTATS*ARC File (Landscape Structure/Spatial Pattern Analysis for ARC/INFO) .EAL Enfocus Action List .EAR Java Enterprise Application Packaging Unit .EAS Elite Visual Basic API Spy (Use care entering this site) .EAZ Express Assist File .EBF Pocket PC WindowsCE Form File EARS Definition Backup (EARS = UK Liberal Democrats Election Agents Record System) .EBJ Geoworks Error Checking Object File .EBK EARS Database Backup (EARS = UK Liberal Democrats Election Agents Record System) .EBO Microsoft Reader Ebook Format .EBP Pocket PC WindowsCE Project File .EBS WindowsXP Scanner File .EBX Electronic Book Exchange (Open Source) [Adobe reader] .ECA electroCAD File .ECC Ecchi Role-playing Format (Generally X-rated Anime File) [XnView] .ECF WinFax Office Add-in File MS Outlook Add-in File .ECO NetManage ECCO File [Alternate site] .ECR Ecrypt E-mail File .ECS Encrypted Compressed GIS Software Geographic Shape File [GIS info] (ArcView, et.al.) (JShape/FShape) .ECW Ensoniq Waveset Format EclipseCrossword Crossword Puzzle Enhanced Compressed Wavelet [XnView] .ECW2002PUZZLE EclipseCrossword Puzzle .ECW2002WORDS EclipseCrossword Word List .ED EasyDraw CAD File (Japanese CAD program) .ED5 EDMICS Graphics File .ED6 EDMICS Graphics File .EDA Ensoniq ASR Disk Image .EDB ROOTS3 Geneological Data .EDC Kryptel (light) Decoder/Encoder .EDD FrameMaker Element Definition Document .EDE Ensoniq EPS Disk Image .EDF Workshare Synergy Document Change Management .EDK Ensoniq KT Disk Image .EDL Edit Decision List (management for video and film post production) .EDM CAD Contouring Parameter Data File Extinction Corrected Differential Photometry .EDML Dreamweaver MX Extension File .EDN EDIF Netlist File (Xilinx ISE FPGA Compiler) .EDP Attachmate Extra! Session .EDQ Ensoniq SQ1/SQ2/KS32 Disk Image .EDS Ensoniq SQ80 Disk Image .EDT VAX Edt Default Settings .EDV Ensoniq VFX-SD Disk Image .EEB WordPerfect Equation Editor Button Bar EaseBook File (Word add-on for writing books and articles in XML) .EES Empire Earth Scenario File [SCN Punk Site] .EFA Ensoniq ASR File .EFC EFCoins File .EFD EARS Filter Definition (EARS = UK Liberal Democrats Election Agents Record System) .EFDEMO Star Trek Voyager Elite Force Demo File [Viewer] .EFE Ensoniq EPS File .EFF IEEP TeamBG File (modify Infinity Engine games) EverQuest Effects File .EFK Ensoniq KT File .EFQ Ensoniq SQ1/SQ2/KS32 File .EFS Ensoniq SQ80 File .EFT Chiwriter High Res Screen Characters .EFV Ensoniq VFX-SD File .EFX eFax.com Fax Document (Used to be JetFax in 1999) .EGA Ventura EGA Screen Characters .EGD GIS Software Encrypted Grid Shape File [GIS info] (ArcView, et.al.) (JShape/FShape) .EGS GIS Software Encrypted Grid Shape File [GIS info] (ArcView, et.al.) (JShape/FShape) .EHTML Enhanced HTML .EI Electric Image [XnView] EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E] .EID Faena MyID Encrypted File IBM ViaVoice Vocabulary File .EIDI Electric Image [XnView] .EK5 Simrad EK500 Scientific Echosounder Data [Use Echoview to analyze] .EK6 Simrad EK60 Scientific Echosounder Data [Use Echoview to analyze] .EKM EXP: The Scientific Word Processor Macro .EL eMacs Lisp Source Code .ELC eMacs Lisp Byte-compiled Source Code .ELD EARS Label Definition (EARS = UK Liberal Democrats Election Agents Record System) .ELETTERHEAD Electronic Letterhead .ELF Black Belt Systems Extended Layer File Tasklink for Windows Machine Control Executable and Linking Format .ELG EARS Log (EARS = UK Liberal Democrats Election Agents Record System) .ELI Encyclopedia Article List .ELL ATI Radeon Video Driver File .ELM MS FrontPage Theme-Pack File [Buy Office XP at Shop.Microsoft] .ELOG McAffee Firewall Log .ELT Event List Text .EM1 Emax I Bank File .EM2 Emax II Bank File .EMAIL Outlook Express Mail Message [Buy Office XP at Shop.Microsoft] (Rename to .EML to access in OE but beware of viruses and worms) .EMB Everest Embedded Bank File IEMBL Nucleotide Format (MIME type chemical/x-embl-dl-nucleotide) .EMBL IEMBL Nucleotide Format (MIME type chemical/x-embl-dl-nucleotide) .EMD ABT Extended Module .EMF Extended Windows Metafile Format [IrfanView] .EML MS Outlook Express Electronic Mail [Buy Office XP at Shop.Microsoft] Note: .EML files with "funny" names in multiple folders implies the Nimda worm. .EMM EARS Mail Merge Definition (EARS = UK Liberal Democrats Election Agents Record System) .EMR Emrite (Wordprocessor file) .EMS PC Tools Enhanced Menu System Config YoshimuraEMS Motorcycle Fuel Injection .EMU Emulation .EMX Enigmacross Puzzle File (Develop professional acrostic puzzles) Emax System File .EMY Eericsson Ringtone .EMZ Windows Compressed Enhanced Metafile (MS graphic format for Office and Visio) .ENC UUENCODE Encoded File Video File BlackIce Evidence Log File Knowledgeware Encyclopedia Encore Music File Dungeon Related File (created by ID software - tied to .DNG file) .END Corel Arrow Definition .ENF RightClick-Encrypt File EndNote Filter File .ENG Dictionary Sprint Dictionary Engine File EnerGrahics Chart Graphics File .ENL Endnote Library File (for research papers) .ENR Enroute Toolath .ENS EndNote Styles File .ENT Entrust Entelligence Secured File .ENU ATI Radeon Video Driver File .ENV WordPerfect Environment WOPR Enveloper Macro Acrobat Spelling File Sierra Print Artist Envelope The Golem Project Environment File .ENW Sierra LandDesigner 3D Terrain Modeling .ENZ EndNote Connection File .EOT MS WEFT Embedded OpenType File .EP Bonas Jaquard EP Weave Format File .EP2 EclipsePackager Package .EPA Award BIOS Logo [XnView] .EPD Express Publisher Publication File EARS Printer Definition (EARS = UK Liberal Democrats Election Agents Record System) .EPI Express Publisher Document File EclipsePackager Invoice EPS Interchange Format [XnView] .EPL Tallyman E-commerce Software? .EPP EditPad Pro Project .EPR Eiffel Project Repository .EPS Encapsulated PostScript [XnView] [IrfanView] Ventura Printer Font .EQL DART Pro 98 Fabric Equalization Presets .EQN WordPerfect Equation .ER1 ERWin File .ERD Entity Relationship Diagram .ERI Entis Rasterized Image (ERI-chan) [XnView] .ERM Entity Relationship Diagram Model .ERP British Economics & Social Research Council Electronic Form .ERR Error Log (various - many associated with install programs) .ERS EARS Control File (EARS = UK Liberal Democrats Election Agents Record System) .ERX ERWin File .ES EasySIGN Drawing Sheet .ESF Emblaze Audio File .ESH Extended Shell Batch File .ESI Esri Plot File .ESL MS Visual FoxPro Distributable Support Library .ESM Enhanced Simplex [XnView] .ESP Ventura File ACD/CurveManager Analysis File Ethos System Analysis File ACD Analysis File (Advanced Chemistry Development) E$Planner File .ESR 4D Database Windows Procedure .ESS EXP: The Scientific Word Processor Style Sheet .EST MS Streets & Trips 2001 Trip File .ESY EmEditor Syntax File .ET2 Electronic Tax Return Security File (Australian taxes) .ETA eTreppid Audio File (eTplayer & ETVC media CODEC) .ETB Seismograph File (compressed?) .ETC eTreppid Compressed File Seismograph File .ETH Ethnograph Document File .ETM eTreppid Audio File (eTplayer & ETVC media CODEC) .ETV eTreppid Audio File (eTplayer & ETVC media CODEC) .ETX SetText Structure Enhanced Text .EUC Japanese (Kanji) .EUI Ensoniq EPS Family Compacted Disk Image .EUK Euklides Dynamic Geometry .EUM Euklides Dynamic Geometry .EUS EDonkey2000 Serverlist Tool .EV EchoView File (sonar fishing data) EV8 File (Virtual Reality applications) .EV2 Java File .EV3 EVERLOCK Options File .EV6 EV8 File (Virtual Reality applications) .EVA Viz Modeler 3D Scene Archive (used for TV graphics) .EVB Embedded Visual Basic File (used on Pocket PCs) [Developer info] .EVC EchoView Color Scheme (Echocolor-created data) .EVI EchoView Index File (speed up processing of echosounder data) .EVK EVERLOCK File .EVL EchoView Line File (echosounder time/depth coordinates) .EVR EchoView Region File (echosounder time/depth coordinates) .EVT PC Tools Event File Scheduler MS WinNT/2000 Event Viewer Log File .EVY Envoy Document .EWB Electronics Workbench .EWD Express Publisher for Windows Document .EWL MS Encarta Document EclipseCrossword Word List .EWP QuickCog Project File .EWS QuickCog Sample Set File .EX EPM Macro File (software install) Euphoria File (Programming language) .EX2 PC Doctor File (HP computer - unverified) .EX3 Harvard Device Driver (Harvard Graphics taken over by Serif) .EX^ Norton Live Update File .EX_ Compressed .EXE File in an Install Archive .EXC QEMM Exclude File REXX Program MS Word Exclusion Dictionary [Buy Office XP at Shop.Microsoft] Text Document .EXD Control Information Cache .EXE Executable File Out-of-process Code Component Used by COM Clients (Component Object Model) Settlers IV Saved Game .EXF Fuji EXIF Format File (Any JPEG viewer should view) [File Format (PDF)] .EXM HP Calculator Executable .EXP ICQ Saved Chat File Embroidery Design File [possibly read with Melco Sizer Software] .EXT Norton Commander Extension File WS-FTP ASCII Binary Transfer File E-mail Text Attachment (unverified) Extinction Corrected Photometry .EXU Euphoria File (Programming language) .EXW Euphoria File (Programming language) .EXX IBM LinkWay MsgPut Intermediate File .EYB Encyclopedia Yearbook File .EYE Glass Eye File (stained glass window design) .EZC EZScreen Screen Saver Editor .EXF Calculus EZ-Fax Fax .EZM Text File (From some mailing lists) .EZP Edify Electronic Workforce Backup Utility .EZS Sunburst Technology Easy Sheet Document .EZT Sunburst Technology Easy Sheet Template .EZX WHAP File .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .F Compressed Archive File (UNIX) FORTRAN Program Newing-Hall Computer Engraving Software Graphic .F00 Kanji Font .F01 Perfect Fax Document .F06 DOS 6 Pixel Screen Font .F07 DOS 7 Pixel Screen Font .F08 DOS 8 Pixel Screen Font .F09 DOS 9 pixel Screen Font .F10 DOS 10 Pixel Screen Font .F11 DOS 11 Pixel Screen Font .F12 DOS 12 Pixel Screen Font .F13 DOS 13 Pixel Screen Font .F14 DOS 14 Pixel Screen Font .F15 DOS 15 Pixel Screen Font .F16 DOS 16 Pixel Screen Font .F2 FLASH BIOS File .F2R Farandoyle Linear Module Format .F3 FLASH BIOS File .F3R Farandoyle Blocked Module Format .F32 Raw 32-bit IEEE Floating Point Values .F64 Raw 64-bit IEEE Floating Point Values .F77 FORTRAN 77 Program .F90 FORTRAN Program .F96 Frecom FAX96 Document .FA EROSION 3D Flow Accumulation [Format (pdf)] .FA1 DATAIR FAS 87/132 Reporter Data File .FA2 DATAIR FAS 87/132 Reporter Custom text File .FAC Usenix FaceServer Graphic [XnView] .FACE Usenix FaceServer Graphic [XnView] .FAM Maxis File (unverified) The Sims Family File .FAQ Frequently Asked Questions .FAQT FAQTool XML Contents File .FAR Farandoyle Tracker Music Module The Sims (Maxis) Archive File [Dragon UnPACKer] .FAS 3D Fassade Plus Basic Module .FAV MS Outlook Bar Shortcuts [Buy Office XP at Shop.Microsoft] .FAX Fax File (various - often TIFF format) [XnView] .FBC FamilyTree Compressed Backup File .FBD F-22 Lightning Advanced Gravis Joystick Control File Remedy Change Management Flashboard DART Pro 98 User-definied Complex Restoration Filters The Quarterback Pro Coverage Worksheet Honeywell Control Builder File (UMC800 Controllers) .FBK Navison Financials Backup FamilyTree Backup File .FBM Fuzzy Bitmap [XnView] .FBS File Burner Skin .FBX 3D Data Exchange Format .FC Harvard Dictionary (Harvard Graphics taken over by Serif) .FC2 Curious Labs Poser Face File .FCB Forest Cover Attribute Processing File FAAST Builder File .FCD Virtual CD-ROM FastCAD/EasyCAD Output Patton & Patton Flow Charting 3 File IsoBuster File .FCF SHELXL93 File (created by LIST 4 command) [contains: h,k,l,Fc^2,Fo^2,sigma(Fo^2)] Altera MAX+PLUS II File .FCG Mystic Photo Format .FCI EROSION 3D Inflow Table [Format (pdf)] .FCM Forward Compression Binary File Patch Fluke Networks CableManager File .FCS Flow Cytometry Standard Format Fantasy Football League Organizer File RealProducer Pro Settings c-tree Server/Plus Data File Canon Zoom Browser EX File CD Trustee File Spectrum Server Log File .FCT Foxpro Catalog Campaign Cartographer 2 File .FCW Campaign Cartographer 2 File FastCAD File [Viewer] .FD FORTRAN Declarations [FORTRAN] Dataflex Field Compiler Offsets .FDB Navison Financials Database Legacy Family Tree Database Art Explosion Portfolio Catalog File .FDF Adobe Acrobat Forms Document Format Definition File (used by PC connectivity packages uploading to midrange systems) .FDI Amiga Disk File (using WinUAE 0.8.17 emulation software) (see ADF) [Amiga Forever] .FDL XYRO Active Distribution Console File Distribution List .FDM Floppy Disk Manager File [Software?] .FDR Final Draft Document File Embroidery Design File [possibly read with Melco Sizer Software] .FDW F3 Design and Mapping Document Form .FDX Force Index .FEB WordPerfect Figure Editor Button Bar .FEC U.S. Federal Campaign Expense Submission File [Also FILPAC] Ferite Programming Language File (http://www.ferite.org is listed but non working) .FEM CADRE Finite Element Mesh File .FEP MS WEFT Embedding Project .FEX Focus File .FF AGFA CompuGraphics Outline Font Description Sigmac Source File .FFA MS Fast Find File .FFF GUS PnP Bank defFax Fax Document Maggi Hairstyles & Cosmetics [XnView] .FFL MS Fast Find File PrintMaster Gold Image File Alien vs Predator Archive [Dragon UnPACKer] .FFO MS Fast Find File .FFT DCA/FFT Final Form Text MS Fast Find File .FFX MS Fast Find File .FGA Folder Guard Attributes .FGD Folder Guard Data Half-life Modification Map Configuration File (also see .BSP) Digital Raster Graphic Metadata File .FGP Folder Guard Passwords File .FH3 Aldus Freehand 3 Drawing .FH4 Aldus Freehand 4 Drawing .FH5 Freehand 5 .FH6 Freehand 6 .FH7 Freehand 7 .FH8 Macromedia Freehand 8 .FH9 Macromedia Freehand 9 .FH10 Macromedia Freehand 10 [Tech note] .FI FORTRAN Interface File [FORTRAN] Flash Image [XnView] .FIC Windev Database System .FIF Fractal Image Format FIF (Iterated System) [XnView] SpinRite Hard Disk Fingerprint File .FIG REND386/AVRIL Graphic Super Nintendo Game-console ROM Image [See ZNES or SNES9x] .FIL dBase Files List Object WordPerfect Overlay Application Generator File Template ACL For Windows Data File (data mining software) File List (various) .FIM Construsyc/Instasyc File .FIN WordPerfect Print Format Text Perfect Writer Print Formatted Text ATI Radeon Video Driver File .FIO ULead Viewer Support File .FIP FingerPost Information Processor File (REMOTE.FIP is parameter file) .FIRE FireStarter Project File .FISH 3d Fish Tank Saved Fish .FISHES 3d Fish Tank Saved Fishes .FISHTANK 3d Fish Tank Saved Fishtank .FIT FITS Graphic (Flexible Image Transport System) [XnView] MS Windows NT File Index Table .FITS FITS Graphic (Flexible Image Transport System) [XnView] .FIX Generic Patch File .FKY Foxpro Macro .FLA Macromedia Flash Movie Authoring File .FLASK FlasKMPEG Language Definition File (ASCII text file) .FLB Papyrus Format Library VersaPro Folder Backup .FLC AutoDesk FLIC Animated Picture [XnView] FLIC Video (may be same as above) .FLD Charisma Folder Hijaak Thumbnail Folder WinFlash Educator Flashcard Options/Statistics File VersaPro Folder Contents 3D Fassade Plus Field Define Module File .FLEX Flexi Data Smoothing (Contact for program) .FLF Corel Paradox Form OS/2 Driver File Navison Financials License File Firehand Lightning Graphic Collection .FLH FLIC Animation (DTA) .FLI Autodesk FLIC Animation [XnView] EmTeX Font Library .FLL Foxpro Library The Sims Floor File .FLM AutoCAD Film Medi@Show File "RealPixel" Animation File (various) .FLO MicroGrafx FlowCharter File .FLP Fruityloops Saved File .FLR Live3D File The Sims (Maxis) Floor Texture File .FLS Farrukh Imposition Purlisher Filelist Document WinFlash Educator Flashcard Source File .FLT Corel Graphic Filter StarTrekker Music Module MulitGen Open Flight File WinFlash Educator Flashcard Compiled Test File OS/2 Warp Filter Device Driver Asymetrix Graphics Filter Support File Micrografx Picture Publisher Filter FLIC Animation (DTA) MS Graphics Filter FileMaker Filter CoolEdit Pro Filter [PAF filter] .FLX FLIC Animation (Tempra Pro, Mathematica, U-Lead, 3DStudio MAX) Dataflex Ordered Binder DataFlex Compiled Binary File .FLZ Medi@Show Data File WinFlash Educator Flashcard Compiled Study File .FM Adobe FrameMaker Document FileMaker Pro Spreadsheet .FM1 Lotus Spreadsheet File .FM3 Harvard Device Driver (Harvard Graphics taken over by Serif) 1-2-3 Format File FileMaker 3 Database Document .FMB WordPerfect File Manager Button Bar Oracle Binary Form Source Code .FMC NCAD File (woodworking CAD program) Embroidery Design File [possibly read with Melco Sizer Software] .FMD Open Access File .FMF IBM LinkWay Font or Icon .FMG FreeMarkets® Graphics Browser (ActiveX Viewer) .FMK PowerStation FORTRAN Make File [FORTRAN] .FML GetRight File Mirror List Oracle Mirror List .FMO dBase Ordered Format .FMP FileMaker Pro Document .FMT Format File Style Sheet Oracle Text Form Format dBASE IV Format File MS Schedule+ Print File MS Visual FoxPro Csreen Format File .FMV Frame Vector Metafile .FMX Oracle Executable Form .FMZ Form*Z Project File .FN3 Harvard Graphics Font (Harvard Graphics taken over by Serif) .FND MS Explorer Saved Search .FNG Font Navigator Group File .FNK FunkTracker Module .FNO Folio Infobase [May be mistype of .NFO] .FNP FlashNpack (convert Flash Movies) [product in beta as of Feb 2002] .FNT Font File (Windows 3.1) .FNX Exact Inactive Font .FO1 Borland Turbo C Font .FO2 Borland Turbo C Font .FOB Navision Attain Object File .FOG Fontographer Font Computer Generated Forces for Action Fog Defaults .FOL 1st Reader Saved Message Folder .FOLDER Mail Folder .FON Font File Telix Dialing Directory Procomm Plus Call Log .FOO Kai's SuperGoo Fusion .FOR FORTRAN Source [FORTRAN] WindowBase Form .FOT Installed TrueType Font .FOUR VAX CRYSTALS Chemical Crystallogaphy File .FOW Family Origins File (Genealogy) .FOX FoxBase File .FP FileMaker Pro File FoxPro Configuration Info .FP1 Flying Pigs for Windows Data .FP3 FileMaker Pro File Imsi FloorPlan 3D .FP5 FileMaker Database Design Report Template .FPA Franklin Potter Associates Business Invoice Designer .FPC FoxPro Catalog File .FPF Canadian Flight Wizard (flight planning software) .FPG DIV Game Studio Multi Map [XnView] .FPK JetForm FormFlow File (JetForm now Accelio) .FPS Operation Flashpoint Game File .FPT FileMaker Pro File FoxPro Memo Fields .FPW FloorPlan Plus Floorplan Drawing .FPX FlashPix Bitmap [IrfanView] .FQF FlashFXP Queue File .FR3 dBase IV Renamed dBaseIII+ Form .FRA FrameViewer File .FRE Creative Digital Blaster Digital VCR File Male Normal CT [XnView] .FRF FontMonger Font .FRG dBase IV Uncompiled Report .FRL FormFlow File .FRM Form File FrameMaker Document FrameBuilder Document Oracle Executable Form Visual Basic Form dBASE IV Report File (and others) WordPerfect Merge Form DataCAD Symbol Report File Megalux Frame [XnView] MYOB Form File .FRO dBase IV Compiled Report FormFlow File .FRP PerForm Pro Plus Form FaxRush Packages (listing of fax files - now .ZPK) .FRS WordPerfect Graphics Driver .FRT FoxPro Report File .FRX Visual Basic Binary Form File FoxPro Report File .FRZ FormFlow File .FS NetBSD File (usually BOOT.FS) PDT Feature Structure File FormSaver File FlexiSIGN File .FSC Campaign Cartographer 2 File .FSF Convert It! Factor File fPrint Audit Tool File .FSH EA Sports Game Graphic Editor File .FSI FileSplit .FSL Borland's Paradox 7 Forms Corel Paradox Saved Form .FSM Farandoyle Sample Format .FSR File Substring Replacement Utility .FSS Iomega Backup File Selection Set .FST FastStats Analyzer File dbFast Linkable Program .FSX Lotus 1-2-3 Data FormSaver Fields .FSY PhotoFantasy Image [XnView] .FT Lotus Notes Full Text Index .FTB Roots3 Index File .FTG Windows Help Full-text Search Group File .FTM Family File MicroGrafx Font .FTP FTP Configuration Information .FTS Windows Help Full-Text Search Index File Flexible Image Transport System [XnView] .FTV Forest & Trees File .FTW Family File FontTwister File (text effect generator) .FU F* You Software Key Generator (Software protection breaker) .FUL Full Foram Count File .FUN Koolmoves File (Flash tool) .FUZZY Fuzzy Logic File .FVF Fluke View .FVML formVista (web application development environment) - Product in alpha Jul 2002 .FVS Forest Vegetation Simulator Tree Data File .FVT Interlock Public Computer Utility .FW Framework Database .FW2 Framework II File .FW3 Framework III File .FW4 Framework IV File .FWB FileWrangler Data File Backup .FWL FileWrangler EXE Library .FWS FileWrangler Data File for File Splitting Configuration .FX FastLynx On-Line Guide .FXD WinFax Sent Document (TIFF format) FAXit Phonebook .FXI File-Ex File .FXM WinFax & WinFax MiniViewer Fax BigFix .FXO Fax Image Document [Open with Quick view Plus] .FXP FoxPro Compiled Source .FXR WinFax Received Document (TIFF format) .FXS WinFax Fax Transmit Graphic .FXT Finale Music Notation Software Plug-in .FZB Casio FZ-1 Bank Dump .FZF Casio FZ-1 Full Dump FontZip Font Packer .FZV Casio FZ-1 Voice Dump .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .G Applause Data Chart Cliq Accessories Datebook Schedule Group [Linux Suite PDF Description] .G3 G3 FAX File [XnView] [IrfanView] .G32 GFA BASIC 32 Program File PaperPort File .G3D GenDesigner 3.x Genealogy Database .G3F Zetafax TIFF File (fine resolution) .G3N Zetafax TIFF File (normal resolution) [XnView] .G4 GTX RasterCAD File Access [XnView] .G42 ADAPTA DLS/32 Supply Chain Planning (ASCII file with info about SKUs and product-groups) .G53 ADAPTA DLS/32 Supply Chain Planning (ASCII file with info about Bills of Material) .G8 PicLab Plane Three Graphics .GAC Global Audio Control Skin .GAF Total Annihilation [XnView] .GAL Gallery of Pictures Corel Multimedia Manager Album .GAM GammaFax Fax Document TADS 2.x Game File Baldur's Gate Game File Animated E-mail (unverified) .GAP Electrical Generation Analysis and Planification .GAT Gator File (password manager) .GAU Gaussian Input File (MIME type chemical/x-gaussian-input) MS Flight Simulator Gauge (e.g., altimiter.gau) .GAY Reported as Sometimes a Porn File (presumably a renamed standard graphic file) .GB Chinese Nintendo GameBoy Emulator ROM Image File Printfox/Pagefox [XnView] .GBA Nintendo® Game Boy Advance ROM Image GrabIt Batch Files .GBC Nintendo® GameBoy Color Emulator ROM Image File .GBD Gator Banner File .GBK Interbase Database Backup .GBL VAXTPU Global Definitions (VAXTPU is default OpenVMS editor) .GBR GIMP Brush File [GIMP] [XnView] Gerber Format File (Graphics Language for the Electronics Industry) [Viewer] .GBS Gameshark Online Save/Snapshot .GBT Photoshop File .GC Sierra Print Artist Greeting Card .GC1 Golden Common Lisp Source Code .GC3 Golden Common Lisp Source Code .GCA GOCA Graphics File G Compression Archiver Compressed File (link is Japanese site) [Mime Type application/x-gca-compressed] .GCC VISUAL EPR COSEUL.EXE Result (table of components of Cartesian tensors) .GCD Generic CADD Drawing IsoBuster File Prassi CD Image GNUe Class Definition .GCF WinXComp Grouped Compressed File .GCI GTA2 Game File VISUAL EPR COSEUL.EXE Result (table of components of irreducible tensors) .GCM GeoConcept Map File Group Mail CMessage Store File .GCP Ground Control Point File (map projection) .GCR VISUAL EPR COSEUL.EXE Output .GCT ApplinX Screen Scrapper (unverified) .GDB Interbase Database Group Mail File .GDF GEOS Dictionary .GDM Bells, Whistles, and Sound Boards Module .GDR SymbianOS Bitmap Font File (can contain multiple typefaces) .GDS Image File Chip Layout Information .GED GEDCOM Family History File EnerGraphics File Graphic Environment Document Arts & Letters Graphics File .GEM GEM (a desktop interface) File Digital Research GEM Paint [XnView] Ventura Publisher Vector Graphics .GEN Ventura-Generated Text File Chromeleon Generic Driver Configuration dBase Application Generator Compiled Template .GEO VideoScope File GeoSoft Compressed Add-on Geoworks Geode GeoPaint [XnView] Trumpf ToPs File (CAD/CAM, laser cutting) .GER GerberView File (partial support for extended Gerber [RS-274X] file format) .GF gFx UNIX Plotting Program METAFONT Generic Font File Geometric Data Pilot Logbook for Grok File Starfleet Command - Empires At War File .GFA Bitmap Graphics File (see .GFX/Warcraft; files are similar) .GFB GIFBlast Compressed GIF Image .GFC Patton & Patton Flowcharting 4 File .GFD Menus for GNUe Forms VISUAL EPR Energy, Fields File .GFI Genigraphics Graphics Link Presentation .GFT NeoPaint Font .GFX Genigraphics Graphics Link Presentation WarCraft II Image File .GFY Grafical 1.0 File .GG Sigmac Compiled Machine Code Gridgen File Sega GameGear Game ROM Image Koala Paint Compressed File [XnView] .GG1 Goofy Golf Deluxe Course .GG2 Goofy Golf Deluxe Saved Game .GGI GGI Extension .GGP GemCom Graphic Format .GHO Symantec Ghost Disk Image File .GHS Lasertank High Scores .GI Sony CD Extreme Global Image File .GIB Graph-in-the-Box Chart .GID Windows Help Index File .GIF Graphic Interchange Format [XnView] [IrfanView] .GIFF Graphic Interchange Format [XnView] [IrfanView] .GIG Sound File .GIM Genigraphics Graphics Link Presentation .GIW Graph-in-the-Box Presentation .GIX Genigraphics Graphics Link Presentation .GJD 7th Guest Game Archive 11th Hour Game Archive [Dragon UnPACKer] GetJet Professional Database (really an Access database) .GJF Gaussian Input Data File .GKH Ensoniq EPS Family Disk Image .GKS Gravis GripKey Document .GL GRASP - Graphical System for Presentation File .GLD Glide File .GLM Glim Data File .GLY MS Word Glossary [Buy Office XP at Shop.Microsoft] .GM Autologic [XnView] .GM2 Autologic [XnView] .GM4 Autologic [XnView] .GM? Heroes of Might & Magic III Saved Game (? = number of human players in game) .GMAX gmax Game Creator .GMD Game Maker Stored Game (game under development--also see .GMR) .GME Interact DexDrive Playstation Memory Card Save .GMF Applause CGM Graphics .GMM Group Mail Message Log File .GMP GTA2 Game File Group Mail List Information File Geomorph Tile Map .GMR Schlafhorst Automation Graphical Monitor Record Game Maker Compiled Game (finished game--also see .GMD) .GMS Corel Global Macro File .GMT Scarlett Expert System Compiler Grammar File (Scarlett is not presently available) .GMX Group Mail Message File .GNA Genigraphics Graphics Link Presentation .GNO Genopro Genealogy Document File .GNT Micro Focus Generated Code .GNX Genigraphics Graphics Link Presentation .GOB Dark Forces Game File [Dragon UnPACKer] Indiana Jones 3D Archive [Dragon UnPACKer] .GOC Geoworks Goc Source Code .GOH Geoworks Goc Header .GOO Kai's Power Goo / Kai's Supergoo .GOR Gorilla (Film & Video Production Management) .GP Geoworks Glue Geode Parameter File .GP3 CCITT Group 3 File (fax) GuitarPro 3 .GP4 CCITT Group 4 File (fax) .GPD VISUAL EPR Input Data for PARAMS.EXE .GPF Believed to be a Japanese graphic file .GPG GnuPG Encrypted File (usually compatible with .PGP files) .GPH Lotus 1-2-3 Graph Stata Graph .GPK Omnigo Program Package [Added Info] .GPL GPS Log File (used by mapping software) .GPP GraphPap Graph Paper File Serif GraphicsPlus Object .GPR VISUAL EPR PARAMS.EXE Results .GPS Pocket CoPilot GPS Tracks Data File .GPX BASIS File .GQA BI/Query Data Model Admin Layer .GQL BI/Query Data Model (used to be Andyne GQL) .GQU BI/Query Data Model User Layer .GR XGMML (eXtensible Graph Markup and Modeling Language) File .GR2 Windows 3.0 Screen Driver .GR3 Windows 3.0 Screen Grabber .GRA Flight Simulator File MS Graph Chart SigmaPlot Data File STN Express Transcript Graphics File (search science databases through STN®) .GRAAL Offical Graal Level .GRB MS-DOS Shell Monitor .GRD Gradebook Power File Map Projection Grid File .GREY Picture File (raw GREY graphics) RAW RGB 24-bit Graphic [XnView] .GRF Graph Graph Plus Graph File Golden Software Graph File Grafix Idea File Graph Edit File [Part of DirectX SDK] DLG "Graphic" Format .GRL Matlab Graphic Format .GRM VISUAL EPR Input Data for FIntGraf .GRN Granny 3D Rendering Program .GRO Serious Sam Game File [Dragon UnPACKer] Warlords Battlecry Archive [Dragon UnPACKer] HP-48/49 GROB [XnView] .GRB HP-48/49 GROB [XnView] .GRP Windows Program Manager Group PixBase Pictures Group Duke Nukem 3D Archive [Dragon UnPACKer] Shadow Warrior Archive [Dragon UnPACKer] .GRQ Quickstep Barco Graphics .GRS Packedge Barco Graphics .GRT VISUAL EPR Calculation Results of Fields .GRV Groove Networks File .GRX GetRight File List .GRY Picture File (raw GREY graphics) RAW RGB 24-bit Graphic [XnView] .GS1 GraphShow Presentation .GSC GeneStudio File (Molecular Biology Software) .GSD Professional Draw Vector Graphics .GSM Raw GSM 6.10 Audio Stream (Global System for Mobile Audio) Sound File [Linux Player] US Robotics Modem File .GSP Geometer's Sketchpad Material File .GSW GraphShow Worksheet .GT2 Graoumftracker Music Module (new) .GTK Graoumftracker Music Module (old) .GTP GuitarPro File MultiFS Video File .GTS Genome Software Tempo Alarm Clock .GTY Gibson Tray File .GUP PopMail Data .GUR Gutsch & Exner Software Update Undo .GUX Gutsch & Exner Software Update .GV Grandview (DOS-based outline program by John Friend who licensed to Living Videotext; bought by Symantec) .GWI Groupwise File (binary file that contains link information) .GWP Greetings WorkShop File [Now MS Picture It!] .GWS GeoMedia Geoworkspace File .GWX Genigraphics Graphics Link Presentation .GWZ Genigraphics Graphics Link Presentation .GX1 Show Partner Graphics File .GX2 Show Partner Graphics File .GXC General CADD Pro File .GXD General CADD Pro File GX-Reports File Jeol EX Spectrometer Data File .GXF General CADD Pro File .GXL Genus Graphics Library .GXM General CADD Pro File .GXP Jeol EX Spectrometer Data File .GXR Genexus Report Viewer GX-Reports File .GXT GTA2 Game File .GYM Sega Genesis Music Logged Format .GZ Gzip Compressed Archive .GZIP Gzip Compressed Archive (more usually seen as .GZ) .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .H Header (Usually C Compiler) .H3M Game Map File (used by a large number of games) .H4R Possible Container for .MP3 Files (MUSIC.H4R) .H! Flambeaux Tutorial Database .H++ C++ Header File .H-- Sphinx C-- Header File .HA Compressed Archive .HAD MixlleniumEngine (Haydee) Web Server Module Style File (XML format) .HAK GameHack File (instruction codes to apply to memory to hack a game) .HAL Mortyr Archive [Dragon UnPACKer] .HAM Image File .HAN Viewpoint Headline Studio (Viewpoint used to be MetaCreations) .HAP Compressed Archive .HAT HAT (HOORA Analysis Tool) Model .HAY MixlleniumEngine (Haydee) Web Server Module Content File (XML format) .HBC Home Buyers Calculator Suite .HBK Mathcad Handbook Humanic Software Accounting Data .HC BI/Suite Hypercube .HCM IBM HCM Configuration .HCR IBM HCD/HCM Production Configuration .HCT Symantec Anti-Virus Live Update File (usually LIVEUPDT.HCT) .HD2 Curious Labs Poser Hand File .HDA HotDocs Document .HDB Nero File (CD burning/design software) .HDF Hierarchical Data Format File Help Development Kit Help File .HDL Procomm Plus Alternate Download File Listing .HDML Handheld Markup Language File (WAP phones; browser prior to 4.X) .HDP Magix Music/Video .HDR Procomm Plus Message Header PC-File+ Database Header Egret Data File ArcInfo Binary [XnView] Adobe Photoshop File Apollo HDRU [XnView] .HDRU Apollo HDRU [XnView] .HDW Harvard Draw Vector Graphics .HDX Help Index (Various) .HED HighEdit Document Hi-Eddi [XnView] .HEH Scarlett Expert System Compiler Facts File (Scarlett is not presently available) .HEL MS Hellbender Saved Game .HEX Hex Dump Macintosh BinHex 2.0 File .HF HF File [XnView] .HFI HP Font Info .HFS Macintosh Disk Image on CD [FAQ] .HFV Simulated Macintosh Volumes on PC Hard Drive [Executor] [HFVExplorer] .HFX HotFax File US Robotics Rapid Comm Voice Data File .HFZ Pinnacle Studio Video Editing File .HGH Star Wars - Tie Fighter High Score .HGL HP Graphics Language (plotter) [SwiftView] .HGS HighGrow Virtual Seed File .HH C++ Header Help Topic Map File HammerHead Drumloop File .HHC Table of Contents File (HHW Application) TurboTax Contents File .HHH Power C Precompiled Header .HHK Help Workshop Index File .HHP Procomm Plus Help Data .HHP HTML Help Project .HIN HyperChem Molecule .HIR C64 Hires [XnView] .HIT HitPlayer Audio File Nonags Dialog Killer Data File The Sims (Maxis) Sound File .HJT TreePad Hypertext Database File .HLB VAX Help Library .HLN Microstation Hidden Line File (unverified) .HLP Windows Help File Stata Statistical Software Help File [Text files whose format predates Windows] .HLX Visual C++ Syntax Coloring Instructions ATI Radeon Video Driver Support File Hyperlatex File Multi-Edit Help File .HLZ Multi-Edit Packed Help File .HM2 Help&Manual Help File Project .HMI Descent Human Machine Interfaces MIDI File .HMM Procomm Plus Alternate Mail Read Option Menu .HMP Descent Human Machine Interfaces MIDI File .HMX MixlleniumEngine (Haydee) Web Server Module Template File (XML format) .HM~ Help&Manual Backup Help File Project .HNF Humax Receiver Settings .HNV TheWord & Bible Companion Hebrew Names Version Bible .HO Magix Music/Video .HOF Hall Of Fame (scores) .HOG Lucas Arts Dark Forces WAD File Descent Mission File [Dragon UnPACKer] .HOT The Sims (Maxis) Sound File .HP HP Graphics Language (plotter) [SwiftView] .HP8 HP NewWave Write ASCII Roman8 Character Set .HPD Harry Potter Related .HPF PageMaker HP LaserJet Fonts HotLine Partial Download File .HPG HP Graphics Language (plotter) [SwiftView] .HPGL HP Graphics Language (plotter) [SwiftView] .HPI Gem Font Information Hemera Photo-Object Image [XnView] .HPJ Help Project File .HPK Compressed Archive .HPL HP Graphics File .HPM Procomm Plus Alternative Menu HP NewWave Emm Text .HPP Borland C++ Builder 6 Program Header InfoMgr Database File .HPR RoboHELP Configuration File .HQX Binhex Text Conversion File (Macintosh) WinXP Game File (sorry no details were in the submission) .HR2 Curious Labs Poser Hair File .HRF Hitachi Raster Format Graphic .HRL Herolab EasyWin32 .HPM Procomm Plus Alternate Main Menu .HPP Zortech C++ Header .HPR RoboHelp Configuration .HQX Macintosh BinHex 4 Compressed Archive .HR TRS 80 Graphic [XnView] .HRM Procomm Plus Alternate Main Menu .HRU HRU File [XnView] .HRX Herolab EasyWin32 .HRZ Slow Scan Television [XnView] .HS Hugs Source Code .HS2 Postering Monochrome Image .HSC HelpScribble Project .HSE Dreamweaver Snippet (pre-MX version) .HSI Handmade Software Graphic File .HSK Nimbus 7 SAMS Data File (Daily ASCII files) .HSM The Sims (Maxis) Sound File .HSQ Data File Associated with Qaz Trojan CAST Application Mining Suite (Query file to generate HTML from Database Server) .HSS Photoshop Hue/Saturation Information Dreamweaver Snippet (pre-MX version) .HST History File Netscape History File Corel QuickCorrect and Speller History File Procomm Plus History File File Associated with WordPerfect (history?) Symantec Anti-Virus Live Update File (usually LIVEUPDT.HST) Host File .HT HyperTerminal .HTA Hypertext Application (run apps from HTML doc) Hemera Thumbnail Archive .HTACCESS Apache Access Configuration File .HTC HTML Component (mechanism for implementing Dynamic HTML in script) .HTF WebBase File .HTI WebBase File .HTM Hypertext Markup Language (HTML) .HTML Hypertext Markup Language (HTML) .HTT Hypertext Template .HTX Extenended Hypertext Template Internet Database Connector File .HULL Halflife Map Collision Hull File .HUS Husqvarna Designer I Embroidery Machine Format [possibly read with Melco Sizer Software] .HUY Eto Dlia Vas .HVD chosenOS HoverNews Skin File ISIS Hviews File (chemical reaction database) CMT Surveyor's Assistant 1.x/2.0x Job HerdView Event Data File .HWCFG VersaPro Hardware Configuration File .HWD Hollywood Presentation File .HWL Hangman Deluxe Word List .HWP Hangul (Korean) Word Processor File .HX EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E] .HXM Procomm Plus Alternate Protocol Selection Menu Descent2 HAM File .HXS Help 2 File (replacement for .CHM) .HXX C++ Header .HY1 Ventura Publisher Hyphenation Algorythm .HY2 Ventura Publisher Hyphenation Algorythm .HYC WordPerfect Hyphenation File .HYD WordPerfect Hyphenation Dictionary .HYP Hypertext File Hyphenation File Acrobat Spelling File Compressed Archive .HZ Chinese .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .I Progress Include File Borland C++ Intermediate File INTERCAL File (INTERCAL=Compiler Language With No Pronounceable Acronym) .I17 Pixel Power Collage [XnView] .I18 Pixel Power Collage [XnView] .I2S Invision for mIRC Settings .I66 Interactive66 Graphic Design Information .IAF MS Outlook 97 and 2000 E-mail Account Settings .IAM Autodesk Inventor CAD File .IAN Sterling Software COOL Business Team Model File Sterling merged with Computer Associates. .IAP TeamBG File (modify Infinity Engine games) .IAX IBM Image Access Executive Bitmap .IB7 Pixel Power Collage [XnView] .IBA MDE InfoHandler Infobase File .IBF Instant Backup .IBM Electronic Arts Deluxe Paint [XnView] Archdos Compressed File (IBM internal file) .IBS i2 iBase File .IBX Interscope BlackBox File (encryption program) .ICA Citrix File Image Object Content Architecture (IOCA) Graphics File [XnView] .ICB Targa Bitmap Image Capture Board [XnView] .ICC Kodak Printer Image IronCAD Catalog .ICD IronCAD 2D CAD File ASTi Model Builder File Rate Structure File (BLDRATE.EXE input) File Associated with Many Games .ICE Archive File .ICF ICOM CS-2100 Radio Programming Data Insane Chat Saved Conversation [ASCII file] (Use care entering this site) .ICL Icon Library File (various) ImageForge/IconForge Microangelo [XnView] [IrfanView] .ICM Image Color Matching Profile File ICC Profile, Acer Monotor Drive .ICN Icon Program AT&T Graphic Format RIPTerm Image [XnView] .ICO Icon ImageForge/IconForge Microangelo [IrfanView] GIMP Icon [GIMP] [XnView] Sun Icon/Cursor [XnView] .ICON Sun Icon/Cursor [XnView] .ICQ ICQ Saved File .ICS Outlook Calendar File [Buy Office XP at Shop.Microsoft] SwiftView Command File IronCAD 3D CAD File Inovate 3D CAD File .ICW InterCAD File (Polish site) .ID Disk Identification File Lotus Notes ID File .IDA MS Server File (default.ida is attacked by the Code Red Worm) .IDB MS Developer Intermediate File Database Used by Disassembler .IDC Core IDC [XnView] .IDD MIDI Instrument Definition .IDE Integrated Development Environment Configuration File Sophos Anti-Virus Virus IDEntity File Borland C++ Project .IDF MIDI Instruments Drivers File .IDI i-deas Web ACCESS File .IDIF Netscape Saved Address Book .IDL MS Visual C++ Interface Definition File OMG CORBA Interface Definition Language .IDQ Internet Data Query File .IDT Output of DLL2IDT Utility (used in disassembly) Text Archive Table (used in software development) .IDV Autodesk Inventor Design View Tree .IDW Aldus IntelliDraw Vector Graphic Autodesk Inventor CAD File .IDX Index (multiple programs) .IDY Debug Information File (IMS Database related) .IDZ i-deas Web ACCESS File .IEF Image File .IES Photometric File Data [Illuminating Engineering Society] .IF9 Pixel Power Collage [XnView] .IFD Jet Form Design Form .IFF Graphic, Sound (Interchangeable File Format) [XnView] [IrfanView] The Sims (Maxis) Object/Data File Sun TAAC Image File [XnView] .IFM Brighterion iPrevent Fraud Model .IFO DVD Info File (contains menus and other information) .IFP KnowledgeMan Script .IFS OS/2 Warp Installable File System IconForge Image EXE Library Yuvpak Compressed Fractal Image .IFW Luminosity Impact! File .IFX ImageSoft v2.00 Graphic .IGES IGES-Format [IGES Info] .IGF Inset Systems Metafile .IGNORE Likely a text file (e.g., README.IGNORE) .IGP Igor Reader Sheet Music File .IGR Intergraph SmartSketch Drawing .IGS IGES-Format [IGES Info] .IGX iGrafx Process (graphical process modeling and simulation) .II C64 Doodle Compressed File [XnView] .IIF QuickBooks for Windows Interchange File .III Intel Phone Compatible .IIM Interscope InstallMaster Setup Project Inshape Graphic [XnView] iOpus Internet Macro .IIMG Interleaf Graphic [XnView] .IJS Text File File Often Associated with J.EXE (not certain what J.EXE does) .IKL MS InkBall (accessory for Windows XP Tablet PC Edition - due end 2002) .IL Icon Library MSIL Assembler Input File .ILB Scream Tracker Data .ILBM Graphic, Sound (Interchangeable File Format) [may be .IFF file, see above] .ILK MS ILink Program Format Outline .ILL Adobe Illustrator Prologue .ILM Satsang Quiz File CAS 200 QDA v3.0 Image List Mode File (DNA mapping) Illuminatus Opus Multimedia File Iomega Zip Drive Speed Configuration File [Good Info Source] .ILPLOPTIONS InterLock and PowerLock (public computer management utility) .ILPLVOUCHERS InterLock and PowerLock (public computer management utility) .ILV ILOG View File .ILVG iLiving P-to-P (iliving file viewer) .IM5 Visilog [XnView] .IM8 Sun Raster Graphic .IMA WinImage File (Floppy and disk imager) Mirage Vector Graphics .IMB IncrediMail File .IMC IncrediMail File .IMF ImageForge/ImageForge Image EXE Library IncrediMail Letter .IMG Bitmap Graphic (several programs) [XnView] [IrfanView] AutoCAD CAD-Camera [XnView] ERDAS IMAGINE Format Planetary Data System [XnView] Idrisi32 Raster Image Radiance Scene Description Image [XnView] CloneCd Related File Floppy Image File Apple Macintosh Disk Copy Format Microtek Eyestar [XnView] Sharp GPB [XnView] Starbase [XnView] Vicar [XnView] Vivid Ray-tracer [XnView] .IMI IncrediMail Animation .IMJ JFIF File With a MS Windows BMP Header (Pegasus Image Corporation) .IMM IncrediMail Trash .IMN IncrediMail Notifier .IMP Urban Chaos Game File Lotus Improv Spreadsheet Babya Installer Archive DVD File FileMaker Database Translation Filter WinIMP Archive .IMQ ImageQ Presentation .IMR Cognos Impromptu Report Writer .IMS Incredimail Graphic .IMT IMNET Image [XnView] .IMV Yahoo Instant Messenger IMVironment .IMW Imageware Surfacer 3D CAD Surface Geometry IncrediMail Sound .IMY iMelody Ringtone Format (link is PDF file) .IMZ Compressed Floppy Image WinImage File (Floppy and disk imager) .IN$ HP NewWave Install File .IN3 Harvard Input Device Driver (Harvard Graphics taken over by Serif) .INB Vermont HighText Script Visual Expert Source Code Documentation .INC Include File (various) Internet Connection File (used by ISPs) .INCD Adobe InCopy/InDesign Link File (Link stories from an InDesign document) .IND dBase IV or DataPerfect Index Well of Souls Game File .INDD Adobe Indesign Document .INF Information or Setup File (many) .INFO Amiga Information File [XnView] .INI Initialization/Configuration File (many) .INK Pantone Reference File Mimio Ink File [Electronic Whiteboard] .INL MS Visual C++ Inline Function File .INP Oracle Source Code Self-Extracting Archive Utility Project GIS Software Text Input File [GIS info] (ArcView, et.al.) (JShape/FShape) .INS Internet Communication Setting AdLib Instrument Music File WordPerfect File Ensoniq EPS Family Instrument Sample Cell / II Instrument InstallShield Script X-Internet Sign-up File Inspiration Mind Mapping Software File 1st Reader Install Script .INSTALL Likely a text file (e.g., README.INSTALL) .INT Borland Interface Units Foxpro Code Page Signature Semi-compiled Program Unreal Tournament Mutator Intermediate Code used for syntax checking (various) .INTER Interspector Project File .INTERLOCKFAVOURITES InterLock and PowerLock (public computer management utility) .INTO Interspector Object File .INU INSPEC Configuration File .INX Foxbase Index ACL For Windows Index (data mining software) .IO Compressed Archive .IOB Imagine File TDDD Format 3D Graphic Database .IOC Instant ORGcharting! Organization Chart .IOCA Image Object Content Architecture (IOCA) Graphics File [XnView] .IOF Findit Document .ION Text Program/Installation Description 4DOS File Description .IP IconPackager File (changes the look of Windows icons) .IPD InstallPROG 6 EDBS Install Database .IPF Microsoft SMS Installer Script (with System Management Server 2.0) .IPG Mindjongg Format [XnView] .IPH InterPaint Hires Image [XnView] .IPK NRG iPack File .IPL Corel Pantone Spot Reference Palette InstallPROG 6 EDBS File Library .IPR IntelliJ Project XML File .IPS Game Patch File (allows running of illegal copies of some games) .IPT Autodesk Inventor CAD File InterPaint Multicolor Image [XnView] .IPW UniPlot Graph [Free viewer] .IPX Interactive Pictures Corporation AV File .IPZ ICQ Skin .IQF Integra 3.0 Query File .IQY Excel Web Query [Buy Office XP at Shop.Microsoft] .IRD MS Money Temporary File .IRIS Silicon Graphics RGB [XnView] .IRS WordPerfect Resource File .ISD RapidFile Dictionary GraphPad InStat InstallShield Dialog .ISH Compressed Archive File Image Speeder [XnView] Image System (HiRes) [XnView] .ISK Command File (similar to a batch file - view in text editor) .ISL InstallShield Temporary Installer File .ISM Image System (Multicolor) [XnView] .ISO File List for CD-ROM [Fantom CD Emulator] ISO Buster File InstallShield Uninstall File ISO-9660 Table Easy CD Creator Disc Image .ISP Internet Sign-up File Internet Communication Settings .ISR MS Streets & Trips Route File Uninstaller Text File (_deisreg.isr) .ISS InstallShield Response File ISS Graphic [XnView] .IST Digitrakker Instrument File (by n-FaCToR) .ISU InstallShield Uninstall Script Easy CD Creator 4 Uninstall File Netscape File .IT Impulse Tracker Music Module Intalk Settings .ITE E-Tabs Reader File .ITF Inside Tract File JPI TopSpeed Pascal Interface File .ITG Intergraph Format [XnView] .ITH InTether Receiver File (security software) .ITI Impulse Tracker Instrument .ITM Infinity Engine Game Item .ITS Internet Document Set Impulse Tracker Sample .ITW Icetips Wizard Editor (partially encrypted ini file) .IV VRML File Open Inventor File .IVF Indeo Video File .IVP Truevision Targa Bitmap [XnView] .IVT Beyond 20/20 Table (Multidimensional data viewer) Concordance Inverted Full Text Database File .IVX Beyond 20/20 Extract (Multidimensional data viewer) .IW Iconware Application Idlewild Screensaver .IW4 DjVu File [XnView] .IWA IBM Writing Assistant Text .IWI Ignite Image Optimiser .IWC Installwatch Database (install monitor) .IWP Wang Text File .IWR i*write 2.0 File .IWR_BAK i*write 2.0 Backup File .IX Framemaker Index File Paperport Search File .IZD Intrexx Application Export Format (binary) .IZT Izl Binary Token .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .J Java Source Code JAR Compressed File .J2K JPEG-2000 JP2 File [XnView] .J62 Ricoh Digital Camera File .J6I Ricoh Digital Camera File .JAG Jaguar Server File (Atari) .JAR Java Archive File (a compressed file for applets and related files) .JAS Compressed Graphic .JAV Java Source Code .JAVA JBuilder Java File .JBC Jam Byte-Code Hex File (8051 Microprocessor File) BestCrypt File .JBD SigmaScan Data File .JBF Paint Shop Pro Browser File [XnView] .JBG JBIG File [XnView] .JBIG JBIG File [XnView] .JBK Juno Backup File .JBP DJ Jukebox Project .JBX Project Scheduler File .JC! FlashGet File .JD Jigsaw Terminal File (Real-time financial data display) .JDB Siren Jukebox .JDE Cariverona .JDF Turok 2 Game File .JDT Accelio Capture Classic (JetForm) Filler (JetForm Corp became Accelio 12 Sep 2001) .JDX EDICT Index (EDICT is Japanese/English Dictionary) .JEF Janome NH10000 Sewing Machine File .JET Hybrid JetFax Fax .JFD FormWare Job JAWS Voice Synthesis Software .JFF JPEG Image .JFI JPEG/JIFF Image [XnView] .JFIF JPEG/JIFF Image [XnView] .JFM Accelio Capture Classic (JetForm) File (JetForm Corp became Accelio 12 Sep 2001) .JFX J2 Fax File .JG6 BigJig Jigsaw .JHTML Dynamo Server Page (Java HTML) .JIF JPEG/JIFF Image [XnView] Jeff's Image Format [XnView] .JIS Japanese .JLF JetLinks Bookmark Managment .JLS JPEG-LS File [XnView] .JMP SAS JMPDiscovery Chart-to-statistics File .JMS Voxtron TeleButler Graphical Voice Response Call Flow .JMX JMeter File (Web performance testing) .JN1 Epic MegaGames Jill of the Jungle Data File .JNB Sigma Plot Workbook File .JNG JPEG Network Graphic [XnView] .JNK Junk (temporary file) .JNL Ingres Journal File .JOB Job File Task Scheduler Task Object AI Research File QuestVision Vector Graphics File (IMG File Conversion) .JOBOPTIONS Acrobat Job Options File .JOD Microsoft.Jet.OLEDB.4.0 Related File .JOR MS SQL Server Journal File .JOT WinJottr Desktop Note JDesignerPro File .JOU VAX Edt Editor Journal Backup .JP2 JPEG-2000 JP2 File [XnView] [Kakadu] .JPC Picture File (Japanese) JPEG-2000 Code Stream [XnView] .JPE JPEG/JIFF Image [XnView] [IrfanView] .JPEG JPEG/JIFF Image [XnView] [IrfanView] .JPG JPEG/JIFF Image [XnView] [IrfanView] .JPL Siren Jukebox .JPS Stereo Image [XnView] .JPX JBuilder Project File JPEG-2000 JP2 File [XnView] .JS JavaScript Source Code .JSB Henter-Joyce, Inc. Jaws Script Binary File (Screen reader program) .JSD eFAX Jet Suite Document Henter-Joyce, Inc. Jaws Script Documentation File (Screen reader program) Join-Split File .JSE JScript Encoded Script File .JSF Macromedia Fireworks Batch Script .JSH Henter-Joyce, Inc. Jaws Script Header File (Screen reader program) .JSL PaintShop Pro File .JSM Henter-Joyce, Inc. Jaws Script Message File (Screen reader program) .JSP Java Server Page .JSS Henter-Joyce, Inc. Jaws Script Source File (Screen reader program) .JT JT Fax .JTD Ichitaro 11 (major Japanese word proccesser) .JTF JPEG Tagged Interchange Format Image Hayes JT Fax [XnView] .JTK Sun Java ToolKit File .JTP JetForm File .JVC Digital Camera File .JW Justwrite Text Jigsaw Terminal File (Real-time financial data display) .JWL Justwrite Text File Library Easy CD Creator's CD Label .JWP JWP Document (Japanese word processor) Easy CD Creator Label File .JZZ Jazz Spreadsheet .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .K Desktop Color Separation Specification Black Layer (usually an EPS file) .K2 Kar2ouche Storyboard File .K25 Kurzweil 2500 Sample Kodak DC25 Digital Camera File [XnView] .KAP MapInfo Sea Chart .KAR Karaoke MIDI File .KAU KeyAudit Software Audit .KB Borland C++ Keyboard Script Knowledge Pro Source Code .KBD Keyboard Script File Layout (various) (Programs produce these layout files but the operating system actually uses them.) .KBI Keirsey-Bates Temperament Sorter Index .KBM Reflection Keyboard Script File Layout Scala Keyboard Mapping (Musical scale editor) .KBP Keirsey-Bates Temperament Sorter Profile .KBR Keirsey-Bates Temperament Sorter Data .KCL Kyoto Common LISP Source Code .KCP Keychamp File .KDC Kodak Photo-Enhancer/Photogen File (raw bitmap image) [XnView] [IrfanView] .KDF Kinkos Photo .KED KEDIT Profile and Macro File (DOS-based version of IBM XEDIT) .KEX KEDIT Macro File .KEY Keyboard Macros Forecast Pro Datafile Program Security or Registration File (various) Sentry 2020 Encryption File Top Secret Crypto File DataCAD Icon Toolbar File Diablo II Key File .KF2 Max Payne Model File .KFA Dark Age of Camelot Animation .KFS Max Payne Model File .KFX KoFax Group 4 Image [XnView] .KGB Kremlin Encrypt File .KIC Kodak Image Compression File [TIFF Info] .KIF Autodesk AutoCAD Key Index File .KIT Raven Toolkit File .KIX KixTart Script (Win NT login scripts) .KIZ Kodak Digital Postcard File .KJV TheWord & Bible Companion King James Version Bible .KKW RoboHELP Keyword Help project Index File .KML Emu48 Emulator File .KMN SIL Hebrew Font System Keyboard .KMP Korg Trinity KeyMaP File .KNF Universal Flat Knitting Machine Pattern Design .KNO Personal Knowbase File .KOA Koala Paint [XnView] .KOS MicroType Pro Document .KPF Kapere (download manager, website grabber and more) .KPG Kai'S Power Goo Graphic .KPP SmartPad Toolpad .KPS IBM KIPS Bitmap [XnView] .KQP Konica Quality Picture (Konica Photo Imaging on-line photo service) [XnView] .KR1 Kurzweil 2000 Sample (multi-floppy) .KRX Karaoke MIDI File .KRY Herolab Krypten .KRZ Kurzweil 2000 Sample .KS SOF Game File Log .KSC Korg Trinity Script .KSE Keepsake Studio Export File .KSF Korg Trinity Sample .KSH Prodigy Internet Registration File .KST Olivetti Olitext Plus Script File .KTK Kutoka's Mia (children's education) .KTT KeyText Data File .KUMAC Physics Analysis Workstation Macro File .KVB Klick-N-View Business Cards [Download] (Note: Developer site - http://www.knvs.com/ - did not exist when checked) .KWD KWord File (Linux Word Processor) .KYB Keyboard Layout .KYE Kye Game Data .KYF Visual-Voice Mouth Movement File .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .L LEX Program File Link Instructions LISP Program File Cliq Accessories Datebook Lock File [Linux Suite PDF Description] .LA Lightscape Animation .LAB Mailing Labels NCSS Data File .LAD Daylon Leveller Animation Data .LAN ERDAS IMAGINE LAN Sensor Data .LAR Liquid Audio Player Registration File .LAT Crossword Express Lattice File .LAV Liquid Audio Player Voucher File .LAVS Liquid Audio Player Streaming Voucher File .LAY Applause Word Chart Layout Lightscape Layer State Track Builder Simulation Compiler Code (Railroad centralized traffic control simulations) MiTek Engineering File .LBA Liberty BASIC File .LBG dBase IV Label Generator .LBI Dreamweaver Library File .LBK VersaPro Local Logic Block Backup .LBL Labels (various) .LBM Electronic Arts Deluxe Paint [XnView] [IrfanView] XLib Linear Bitmap Graphic .LBO dBase IV Ordered Labels .LBR Compressed Archive File Lotus 1-2-3 Display Driver Omnis7 Application File .LBS Omnis Studio Application File .LBT Foxpro Label Memo .LBX Foxpro Label .LBXADD Libronix DLS Addin .LBXALV Logos Bible Software Series X Passage In All Versions .LBXCBV Logos Bible Software Series X Copy Bible Verses Style .LBXCIT Libronix DLS Citation Format .LBXCMP Libronix DLS Company Information .LBXCOL Libronix DLS Resource Collection .LBXCTB Libronix DLS Custom Toolbar .LBXDAT Libronix DLS Data File .LBXDTP Libronix DLS Data Type .LBXLBK Libronix DLS License Backup .LBXLIC Libronix DLS Licenses File .LBXLLS Libronix DLS Resource (LLS Format) .LBXNOT Libronix DLS Notes .LBXOEB Libronix DLS Resource (OEB Format) .LBXPDF Libronix DLS Resource (PDF Format) .LBXPLN Logos Bible Software Series X Bible Reading Plan .LBXPLV Logos Bible Software Series X Parallel Bible Versions .LBXPRF Libronix DLS Preferences .LBXRAS Libronix DLS Resource Association .LBXRTP Libronix DLS Resource Type .LBXSHL Libronix DLS Shell .LBXUPD Libronix DLS Update Script .LBXVRS Logos Bible Software Series X Verse List .LBXWKS Libronix DLS Workspace .LBZ Leibniz Mathematical Word Processor .LCD CDspace CD Emulator .LCF Linker Control File .LCH PagePath Technologies LAUNCH! File .LCK MS Frontpage-related File [Buy Office XP at Shop.Microsoft] Paradox Lock File Adobe Pagemaker Database File .LCL FTP Software Data .LCN WordPerfect Dictionary File .LCS ACT! History File .LCW Lucid 3-D Spreadsheet .LD Telix Long Distance Codes .LD1 dBase Overlay File .LDA LaserData [XnView] .LDB MS Access Lock File [Buy Office XP at Shop.Microsoft] TrueVector Log Database Settler for Windows Temporary File .LDD Laser Dispatch Data .LDF LuraDocument File [XnView] [IrfanView] Geoworks Glue Library Definition MS SQL Server Transaction Log File .LDL Corel Paradox Delivered Library OzWin CompuServe E-mail/Forum Access Download Request .LDR LDraw Model File .LDS Laser Dispatch Script Trane Trace Load .LEG Legacy Graphic Format .LEN PlatePrep (output on flexo plates) .LEP Label and Envelope Designer Plus 2000 .LES Learn Lesson File Mklesson Lesson File Logitech Entertainment Game Profile .LET Letter .LEV Worms Armageddon Map Worms World Party Map NetHack Level File .LEX Lexicon (dictionary file - many) Lexmark Printer Install File .LFA LifeForm File .LFF LucasFilm Format [XnView] .LFL LucasFilm Library .LFM LifeForm File .LFP LifeForm File .LFQ LeechFTP Queue File [also see BitBeamer] .LFT Chiwriter Laser Printer Font 3D Studio Loft File .LFXM FaceMail Text to Speech E-mail (Site Requires Application Download!) .LG Logo Procedure Definition .LGC Program Use Log File (for Windows Program Use Optimization) .LGF legal Eagle Text File .LGO MS Windows Logo Driver SuperFax Header/Footer Logo .LGP Logotron SuperLogo File .LGT Urban Chaos Game File The Sims (Maxis) Lighting File .LHA Compressed Archive File (LZH format; LHA.EXE) Compressed Archive File (LHARC.EXE) Compressed Archive File (LHARK.EXE) .LHS Literate Haskell Source File .LHW Compressed Amiga Archive File .LHZ LHA Compressed Archive File .LIB Program Library (diverse programmers' languages and installers) Greeting Card Library (e.g., KEY Greeting Card Designer) Library Used by an Application (e.g., EndNote Library) .LIC License File (various Shareware) .LID WinDVD File .LIF Compressed Archive File HP Logical Interchange Format File Homeworld Texture [XnView] .LIM Limit Compressed Archive .LIN AutoCAD Line Art VAX Program Listing .LIQ CollegeBAR Bartending Software Liquor Cabinet .LIS VAX Program Listing Structured Query Reporting (SQR) Output .LIT MS Reader EBook File .LIV LiveMotion SWF Movie (also called Bigshot Movie) .LIVEREG Symantec Norton Anti-Virus Update Session .LIVESUBSCRIBE Symantec Norton Anti-Virus Update Catalog .LIVEUPDATE Symantec Norton Anti-Virus Update File .LIX Libronix DLS Resource (LLS 2.x Index) Extend Simulation Library File .LJ Text File for HP LJ II Printer .LKO MS Outlook Express Linked Object [Buy Office XP at Shop.Microsoft] .LKS WinAmp Links File .LL3 LapLink III Document File .LLB LabView File .LLC LapLink Saved Connection File .LLP VersaPro Local Logic Block Digital Chart of the World Data File .LLT Digital Chart of the World Data File .LLX Laplink Exchange Agent .LM8 Picture File .LMD Tune Smithy List of Modes for a Musical Scale .LML LOGML File (Log Markup Language) .LMU RPG Maker 2000 (map included in an RPG game) .LNB Logomanager File .LND 3D Landscape Data .LNG Diablo II File NRG SDR Language File .LNK Linker File Windows Shortcut File .LMP Quake File .LNS LinkStash Bookmark File .LOC Suppose Locations File .LOD Load File (various) .LOG Log File (many different programs - usually an ASCII text file) .LOGONXP LogonStudio File (customizes the WindowsXP Logon screen) .LOK FileWrangler/ZipWrangler/SecurDesk! Encrypted Archive .LP LP88 Linear Programming for the IBM-PC File Lightscape Preparation File FlexRip/B (Print Control and Press Behavior) .LP3 Hansen Software Label Printer (ver 1.0 - 2.1) .LP4 Hansen Software Label Printer (ver 3.x) .LPA LPA-View Laser Particle Analyser Test Analysis Software .LPB LP88 Linear Programming for the IBM-PC File .LPC Teko Printer Driver .LPD Helix Nuts and Bolts File (Helix Software now part of McAfee) Avery Label Pro .LPI Live Pictures .LPN LVPlan - Planification of Low Voltage Aerial Distribution Networks .LQF Leech FTP Save Queue File .LQP Liquid Audio Player Passport File .LQT Winamp File Liquid Audio Player File .LRC Intel Video Phone File .LRF MS C/C++ Linker Response File .LRM Microsoft Encarta Class Server Learning Resource .LRS WordPerfect Language Resource File Daylon Leveller Rendition Style (data used for visualizing heightfields) .LS Lightscape Solution File Freeware Dictionary Project Data File .LS1 OzWin CompuServe E-mail/Forum Access Library Listing .LSA Liquid Audio Player Skin File .LSC Tune Smithy List of Muscial Scales .LSD RPG Maker 2000 Saved Game File .LSE Nokia Audio Manager .LSF Streaming Audio/Video File Libronix DLS Resource (LLS 2.x) .LSG MS LocStudio Glossary .LSL Corel Paradox Saved Library Lotus Script Library Daylon Leveller Shape List (3D geometry for heightfield vector objects) .LSO Logic Audio File .LSP LISP Program File .LSQ VAX CRYSTALS Chemical Crystallogaphy File CalTech PaleoMag Least Squares Format .LSR Logos Library System 2.x Standard Reference Definition .LSS Legato Spreadsheet .LST Listing or List (e.g., packing list) PowerPoint File [Buy Office XP at Shop.Microsoft] Ingres Dump List File OzWin CompuServe E-mail/Forum Access Library Listing 1st Reader Keyboard Macro Oracle Spool File Family Tree Maker Error File .LSX Streaming Audio/Video Shortcut .LT2 Curious Labs Poser Lighting File .LTG Lasertank Bitmap Graphics .LTH Sierra Print Artist Letterhead .LTM Lotus Form .LTR Letter ACT! (DOS version) Letter File .LTT SDR99 Speech Recognition Task Lexical TREC Transcription HP Library and Tape Tools Log File .LU ThoughtWing Library Unit File .LUA Lua Source .LUL OzWin CompuServe E-mail/Forum Access Upload .LUP OzWin CompuServe E-mail/Forum Access Library Update .LVL Parallax Miner Descent/D2 Level Extension Lasertank Level Max Payne Uncompiled Level File [Added Info] .LVP Lucent Voice Player (Intuity Audix Multimedia Messaging System) LView Pro [XnView] .LVS Daylon Leveller Selection Mask .LVW Daylon Leveller View File .LW3 Lightwright File (spreadsheet/database to manage professional lighting design paperwork) .LWA LightWorks Archive (LWA) Material/Scene File .LWC Living Word Commentaries Bible File .LWD LotusWorks Text Document .LWF LuraWave-compressed Graphic File [XnView] [IrfanView] .LWI LightWorks Image [XnView] .LWO NewTek Lightwave® Object .LWP Lotus Wordpro 96/97 File .LWS NewTek Lightwave® Object Layout .LWV MS Linguistically Enhanced Sound File .LYR DataCAD Layer File Song Lyric File [On-line Guitar Archive] .LYT TurboTax Log File SignMaking Application Extension .LYX LyX (WYSIWYM document processor) .LZD Binary Difference File .LZH Compressed Archive File (LHARK.EXE) Compressed Archive File (LHARC.EXE) .LZS Compressed Archive File Skyroads Data File .LZW Compressed Amiga Archive File .LZX Compressed File .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .M Matlab Function Brief Macro Source Mathematica File Limbo Interface Declaration (Inferno OS) Cliq Accessories Datebook Modification File [Linux Suite PDF Description] Desktop Color Separation Specification Magenta Layer (usually an EPS file) .M_U MazeGold Critical File Backup .M?? Ingres Modify Table/Index File (?? = Hex 00 to FF) .M$S MindStor Firmware Update File (M$A$W.M$S) .M11 MASS11 Text File .M12 Proprietary Data Format for Interchange of Defense Form Data with Mil-Pac Technology Software Products (link is PDF file) S-BASIC File Hydrographs Synthesis Project File SHARP MZ-series Emulator File .M15 Apple MPEG-1 Video .M18 Accolade Golf Course File .M1A Apple MPEG-1/2 Audio .M1V MPEG-1 Video File .M2A Apple MPEG-1/2 Audio .M2P MPEG-2 Program Stream Format File .M2S MPEG-2 Audio and Video (system stream) .M2V MPEG-2 Video Only File .M3 Modula 3 Program File .M32 Dr.T MIDI File .M3A MPEG Archive Enhanced .M3U Playlist File .M3D 3D Animations Macro Corel Motion 3D Animation EverQuest File .M3S Myst III Exile Saved Game .M3U MP3 Playlist File [WinAmp] [MattBatt iAM-player] .M4 UNIX M4 Preprocessor File .M75 Apple MPEG-1 Video .M8 Heretic II MipMap [XnView] .MA Maya File (ASCII) Diablo II Map File .MA3 Harvard Macro (Harvard Graphics taken over by Serif) .MAC MacPaint Bitmap Graphic [XnView] Macro (various) .MACP MacPaint Bitmap Graphic [XnView] .MAD MS Access Module Shortcut [Buy Office XP at Shop.Microsoft] Game Movie File (unverified) .MAF MS Access Form Shortcut [Buy Office XP at Shop.Microsoft] .MAG MPS Magro Paint System Graphic MS Access Diagram Shortcut [Buy Office XP at Shop.Microsoft] MAGIchan Graphic [XnView] .MAI VAX Mail .MAK Make File (compiler project file) .MAM MS Access Macro Shortcut [Buy Office XP at Shop.Microsoft] .MAN Manual (often an ASCII text file) Windows 2000 Mandatory User Profile (C:/DOCUMENTS AND SETTINGS/USERNAME/NTUSER.MAN) .MANIFEST MS Visual Stylesheet for Windows Forms (Text file) .MAP Image Server-side Image Map (allows one to map link locations in a Web graphic) Color Palette AccView Network Map Atlas MapMaker Map DIV Game Studio Map [XnView] Fenix Map [XnView] Ingres Termcap Mapping File Poser 3D Map File WorldCraft Quake/Half-Life Game Level File Blood Game File Map Duke Nukem Game Level Data File ...and many more games (too many to list) Linker Map Micrografx Picture Publisher Format Data PROGNOSIS Map Document File .MAPIMAIL MS Outlook Express Mail File .MAQ MS Access Query Shortcut [Buy Office XP at Shop.Microsoft] .MAR MS Access Report Shortcut [Buy Office XP at Shop.Microsoft] VAX Macro Assembly Program Bibliographic Data Format (usually .MRC) .MAS Focus Master Data Definition MS Access Stored Procedures [Buy Office XP at Shop.Microsoft] Lotus Freelance Graphics Smartmaster File QuickCard File .MAT Sound File Pro/Engineer Material Properties File Matlab Variables Binary File MS Access Table Shortcut [Buy Office XP at Shop.Microsoft] Autodesk 3D Studio Max and Viz File Poser 3D Pose File .MAUD Sound File [Linux Player] .MAV MS Access View Shortcut [Buy Office XP at Shop.Microsoft] .MAW MS Access Data Access Page .MAX Kinetix's 3D Studio MAX Scene Autodesk 3ds Max Scene File Maximizer Contact & E-business Program Paperport Scanned Image [Viewer] Max Source Code OrCAD Layout File .MAZ Hover Maze Data Division's dVS/dVISE File .MB Paradox Memo Holder Maya Binary (3D Software Maya Scenes) .MB1 Apogee Monster Bash Data File .MBD Multimedia Builder MP3 Authoring File .MBF MS Money Backup File .MBFS Stardent AVS X Image [XnView] .MBFAVS Stardent AVS X Image [XnView] .MBG Mailbag Assistant E-mail Archive .MBK dBase IV Multiple Index Backup VersaPro Motion Block Backup .MBM SymbianOS Multi BitMap Image (native EPOC image format) [XnView] .MBS Mailbag Assistant Script .MBT ecBuilder Template (Web site cataloging) .MBW MarketBrowser (investment charting/analysis) .MBX Mailbox Message File (Outlook v1-4 or Eudora and others) .MC MetaCard Script PlaySaver and PSEmuPro Memory Card Save and Single Game Save .MC8 Mastercam 8 File .MCA i-deas Web ACCESS File .MCC Mathcad Configuration Mylar City Character Editor Dialer10 Calling Card Monu-Cad Pro CAD File VectorWorks/MiniCAD File [Viewer] Incite Media Assistant File .MCD Mathcad Document Craig McDowall.com NotePad Monu-Cad Pro CAD File Bleem! Memory Card Save .MCF Mathcad Font Meta Content Format File (describes a Web site) [Process description] Master Command File TMPGEnc Template (Multimedia Container Format File) .MCH Macromedia Xtra Cache File .MCI Media Control Interface Command Set .MCL Multimedia Manager Collection File Macro Command Language (Symbol handheld terminals) .MCP Mathcad Printer Driver Capsule Application Script .MCQ McAfee Quarantined File .MCR DataCAD Keyboard Macro File PlaySaver and PSEmuPro Memory Card Save and Single Game Save CuteFTP Script .MCS MathCAD Format File .MCT Musicator .MCW MacWrite II Macintosh Text File .MCX Graphic File .MD Compressed Archive File Teknical eLearning Objects Meta-Data File (stores info on related file) .MD1 Gear CD Suite File .MD5 MD5summer (generates and verifies md5 checksums) [MD5 Generator] [fsum Checksum Utility] .MDA MS Access Add-in MS Access 2 Workgroup .MDB MS Access Database MS Access Application Mediator Multimedia Data .MDE MS Access Database File .MDF Menu Definition File MS-SQL Master Database File Accelio Capture Classic (JetForm) Filler (JetForm Corp became Accelio 12 Sep 2001) I-deas Master Drafting Machine Data File .MDL Digitrakker Music Module (by n-FaCToR) Rational Rose Quake Model File 3D Design Plus Model Simulink Simulation Model ASTi Model Builder File CA-Compete! Spreadsheet Half-life Model [XnView] Moray Model (wireframe modeller supporting POV-Ray 3.1) Symbian OS MIME Type Library .MDM Telix Modem Definition .MDMP WinXP Trouble Report (extension is added to file sent) .MDN MS Access Blank Database Template [Buy Office XP at Shop.Microsoft] .MDO MS Internet Information Server Configuration Backup .MDP MS Developer Studio Project .MDR FaxTalk Modem Doctor Modem Report File .MDS Media Description File [Fantom CD Emulator] .MDT MS Access Add-in Data [Buy Office XP at Shop.Microsoft] MS ILink Incremental Linker Data Table .MDW MS Access Workgroup Information [Buy Office XP at Shop.Microsoft] .MDX dBase IV Multiple Index [File Structure] Avery Label Pro Re-Index File .MDZ MS Access Wizard Template [Buy Office XP at Shop.Microsoft] .ME Information (e.g., READ.ME) .MEA Meazure File (screen measurement and capture utility) .MEB WordPerfect Macro Editor Bottom Overflow File .MED WordPerfect Macro Editor Delete Save OctaMED Tracker Module .MEL Ericsson Phone Melody Maya Embedded Language Script .MEM WordPerfect Macro Editor Macro Memory File of Variables MS FoxPro Memory Variable Save File .MEN Menu .MEQ WordPerfect Macro Editor Print Queue .MER WordPerfect Macro Editor Resident Area Data Interchange Format .MES Message File WordPerfect Macro Editor Work Space .MET WordPerfect Macro Editor Top Overflow File Presentation Manager Meta File OmniPage Document eDonkey2000 File .METHODS Likely a text file (e.g., README.METHODS) .MEU DOS Shell Menus .MEX Matlab Executable Command WordPerfect Macro Editor Expound File mexReader Multimedia File .MEZ RealArcade Game Information .MF MetaFont Text File .MFA MS Site Server 3.0 Report Definition .MFF MIDI File Format .MFG MediaForge Runtime Player .MFM VTeX Multiple Master Font Metrics (a variant of the Adobe Font Metrics (AFM) format?) .MGC MGCSoft Equation Editor File .MGCF MagicInstall Compressed File .MGD Master Grade Gradebook .MGF Image File Micrografx Font Materials and Geometry Format File .MGL MosASCII Graphics Library .MGM MGCSoft Equation Editor Macro File .MGR MGR Bitmap [XnView] .MGX Micrografx Picture Publisher Clipart .MGZ Metal Gear Solid Archive [Dragon UnPACKer] .MH Graphic File .MHG Multimedia File .MHK Riven Movie Data File (Mohawk Archive) .MHP MS Home Publishing Project .MHT MS MHTML Document (Archived Web Page) .MHTML MS MHTML Document (Archived Web Page) .MI Miscellaneous CoCreate CAD File .MIB Management Information Base File (SNMP Management Programs) .MIC MS Image Composer File .MID MIDI File [IrfanView] .MIDI MIDI File [IrfanView] .MIF MIDI Instrument Adobe FrameMaker Interchange Format Software License Tracking Tool (CERTAUTH.MIF) MapInfo Interchange Format File MicroHof .MIF Assembler File Image Magick File [XnView] .MIFF Image Magick File [XnView] .MII MicroStat II Data File .MIL Group 4 Fax File Micro Illustrator Uncompressed Graphic [XnView] .MIM Multi-Purpose Internet Mail Extensions (MIME) File [MIME] .MIO mexReader Multimedia File .MIP Paint Shop Pro Multiple Image Print File .MIS Delta Force Land Warrior Mission [Fan site] Tribes 2 Game File MagicInstall Installation Script (Under development Feb 2002) .MIX Power C Object File Multilayer Picture File (MS PhotoDraw 2000 & MS Picture It!) Don Knuth's MIX Emulator Command & Conquer Movie/Sound File Techno eJay Music Mix File OzWin CompuServe E-mail/Forum Access Index File .MJ MovieJack DVD Ripper File .MK Make File .MKD Malz++Kassner CAD5 Drawing .MKE Make File .MKI Picture File .MKL Malz++Kassner CAD5 Drawing Library Créatoria .MKS Tact Data .ML3 Milestones 3.x Project .ML6 PowerPoint Milestone File .MLB Macro Library .MLD Multilizer Dictionary .MLI Encyclopedia Media List 3D Studio's Material-Library File .MLK Sierra Mastercook File .MLM Novel Groupwise E-mail File .MLS Miles Sound Tools Compressed DLS .MM Macro Mania Macro Multimate Advantage File Lightscape Material Map .MMB MultiMedia Builder Oracle Forms Menu Binary Source Code .MMC Media Catalog MSoffice Media Content (MS OfficeXP) .MME Multi-Purpose Internet Mail Extensions (MIME) File [MIME] .MMF Meal Master Format MS Mail File .MMI Memo Open Client .MML Mail Meta Language .MMM Animation MS Multimedia Movie MacroMind Directory RIFF/RMMP Format Movie .MMO RapidFile Memo Writer .MMP MindManager Map File Gammadyne Mailer Project File Bravado Board Video Output Format .MMPBT MindManager Branch Template File .MMPT MindManager Template .MMS Miles Sound Tools (Midi+DLS/MLS) .MMSCRIPT MindManager Script File .MMT Nimbus 7 SAMS Data File (monthly mean retrieved temperatures) .MMV Sony MovieShaker File .MMW Microsoft Media Content .MMX Command & Conquer Red Alert 2 Map File Oracle Forms Compiled Menu .MMZ MusicMatch Theme File .MN2 Descent2 Mission File .MN3 Descent3 Mission File .MN4 Microsoft Money Database (older version) .MNB MuPAD File .MNC My Notes Center File .MND AutoCAD Menu Program File MNI Mandelbrot for Windows .MNG Animation Shop Animation DeLorme Map'n'Go Map Multi-image Network Graphic [XnView] .MNO Monopoly Saved Game Macromedia Design Notes .MNR AutoCAD Compiled Menu File .MNS AutoCAD ASCII Menu File .MNT Foxpro Menu Memo .MNU Menu File (various) HP NewWave Advanced Macro .MNW Menu File (various) .MNX AutoCAD Compiled Menu File Foxpro Menu .MNY MS Money File .MOB Device Definitions .MOD Music File (various) Model File (various) Modula-2 Program File ProModel Optimization Software Suite Model Windows Kernel Module Amiga and PC Tracker Module MS Multiplan Spreadsheet Monarch File (data mining) .MODEL Catia File .MOL MDL Molfile (MIME type chemical/x-mdl-molfile) [Requires Chime Plug-in] Easy Palette Object Library .MON ReadMail Monitor (UNIX) .MOP Mopac Input File (MIME type chemical/x-mopac-input) .MOR Poser 3D Morph Target File .MOV QuickTime Video Clip [IrfanView] Apple QuickTime Audio AutoCAD AutoFlix Movie .MOVERADDIN Mover (Inventory Management) Add-in .MOVERBACKUP Mover (Inventory Management) Backup Set .MOVERCONFIG Mover (Inventory Management) Configuration .MOVERDB Mover (Inventory Management) Database .MOVERREG Mover (Inventory Management) Registration Info .MOVERTEMPLATE Mover (Inventory Management) Template .MOVIE Video .MOX Extend Simulation Model File .MOZ Netscape Temp File .MP Multiplan File Maya Personal Learning Edition File EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E] .MP+ MpegPlus Audio File (replaced by .MPC) .MP1 MPEG Audio Stream, Layer I .MP2 MPEG Audio Stream, Layer II .MP2V MPEG Audio Stream, Layer II .MP3 MPEG Audio Stream, Layer III [IrfanView] SHARP MZ-series Emulator File .MP4 iVAST MPEG-4 (hold BIFS-Binary Information For Scene representation) [MPEG-4 Industry Forum] .MPA MPEG Audio Stream, Layer I, II or III Palm Memo File .MPC MS Project Calender MP3 Collector Collection Manager File VersaPro Compiled Motion Block Musepack Audio File (new format replacing .MP+) .MPD Mini Port Driver MS Project Database File .MPDEX MPdex MP3 Database Utility .MPE MPEG Movie Clip .MPE.EXE MP3 Digital Player Wrapper .MPEG MPEG Movie .MPF MS Design Gallery MosASCII Project Workspace File .MPG MPEG Animation [IrfanView] MPEG 1 System Stream .MPGA Mpeg-1 Layer3 Audio Stream .MPH MS Publisher .MPJ RoboHTML Project Mountain Video Editing File (Atari) .MPK Augmented MS-Project File .MPM WordPerfect MathPlan Macro Max Payne MOD Archive [Added Info] .MPNT MacPaint Bitmap File [XnView] .MPO Augmented MS-Project File .MPP MS Project File CAD Drawing File .MPQ Blizzard Game Data File (also other games) .MPR Foxpro Program Westwood Studios Game File (e.g., Red Alert, et.al. - should be a text file) FileMaker Spelling Dictionary .MPS Multimedia File MPEG-1 Audio and Video File (system stream) Casio PDL Pocket Streets Map (Microsoft product - see just below) MS Pocket Streets Map File Max Payne Saved Game Garmin Mapsource GPS Mapping Interface MySweetNix! (change MSN Messenger Service nickname every n seconds) .MPT MS Project Template File Multipage TIFF Bitmap .MPV MS Project View MPEG-1 Video File .MPV2 MPEG Audio Stream, Layer II .MPW MosASCII Project Workspace File .MPX Foxpro Compiler Menu MS Project Export File RCA/Lyra Handheld MP3 Player File (secure MP3 format that only plays in this player) .MRB MS C++ Multiple Resolution Bitmap Graphic .MRC MIRC Script File Bibliographic Data Format .MRF Marks Russel File [XnView] .MRI MRI Scan .MRK Informative Graphics Markup File .MRO SharpEye Music Reader File .MRS WordPerfect Macro Resource File .MRW Minolta Diamage RAW Graphic (use view software supplied with camera) .MS Checksum File for Anti-Virus .MS1 OzWin CompuServe E-mail/Forum Access Message File .MS3D MilkShape 3D Model .MSA Magic Shadow Archive .MSC Microsoft Common Console Document MS C Makefile .MSF Multiple Sequence File (biomedical analysis) .MSG Program Message OzWin CompuServe E-mail/Forum Access Message File MS Mail Message .MSH MASH (The Microsoft Agent Scripting Helper) .MSI Windows Installer File (associates components with features and contains installation control info) .MSK Autodesk Mask File PaintShop Pro Mask File [XnView] .MSM MultiSIM Circuit Diagram .MSN MS Network Document (possibly nicknames) Descent Mission File .MSO MS Word OLE Web Page Storage Stream [Buy Office XP at Shop.Microsoft] MS FrontPage File [Buy Office XP at Shop.Microsoft] Math Script Object File .MSP MS Paint Graphic File [XnView] Windows Installer Patch Magix Music Studio File .MSPX Related to Microsoft's .NET (still researching) .MSR OzWin CompuServe E-mail/Forum Access SYSOP File .MSRCINCIDENT MS Remote Assistance Request .MSS Manuscript Text File (various) Game Score .MSSYTLES Windows Visual Style File .MST Minispecification DATAIR Pension System Master File Windows SDK Setup Transform Script (contains mods to apply to package during installation) ChemFinder Chemical Structure Index Visual Test Source File .MSW Word Text File [Buy Office XP at Shop.Microsoft] .MSWMM Microsoft Windows Movie Maker Project (Part of WinME & XP) .MSV Sony Memory Stick Format .MSW MS Word Text File .MSX Compressed CP/M File Archive .MTA MS Flight Simulator Maintenance File .MTB MINITAB Exec File (a macro file) .MTD Digital Sheet Music [Viewer] .MTF Darkstone Archive [Dragon UnPACKer] MicroSurfer File (Link manager/accelerator) .MTH Derive Math File .MTK Matrikon Software License File .MTL MathLook File .MTM Sound File MultiTracker Music Module .MTP L&H Power Translator Pro .MTV MTV Ray-tracer [XnView] .MTW Minitab Data File .MTX Temporary File often used by a browser or TWAIN device .MU Quattro Menu .MUC Music Collector Collection Manager File .MUF ProtoMuck Multi User Forth Program .MUL Ultima Online Game .MUP Music Publisher File .MUS MusicTime Audio File Finale Music Score Harmony Assistant, Melody Assistant, Myriad Music plug-in, Melody Player .MV Miva Script .MV3 Oozic 3D MusicVideo .MVA Matrox Video Card Driver .MVB Database MS Multimedia Viewer File [Viewer Download] Note: The viewer download is old. Don't overwrite any new files with old. .MVC Music Collector Collection Manager File .MVD MicroDVD DVD Movie .MVE Interplay Video File [Descent2] .MVF Movie Stop Frame File .MVI AutoCAD Movie Command File .MVW Saber LAN Log File .MW4 MechWarrior 4 Map .MWD Photo Soap2 File .MWF ProMotion Animation Autodesk MapGuide Author Map Window File .MWM Mail Warrior File .MWP Lotus Wordpro 97 Smartmaster File MegaWorks Pack File [Dutch] .MWS Maple Spreadsheet .MWV MovieWorks File .MX3 Bitbop Tuner Locked Sound File .MXD GIS Project File (map information) .MXE Macro Express Mindex Effect Album .MXI Proteus File (personal light and sound stimulation system) Macromedia Extension Information Mindex Indices file for Indexed Images .MXM MS Project/Outlook Team Assign Task Mindex Master Index File for a Category .MXP Macromedia Extension Manager ArcReader Published Map .MXT MS C ArcMap Map Template .MYD MySQL Data File .MYI MySQL Data File .MYDOCS MyDocs Drop Target .MYP Make Your Point Presentation .MYS Myst Saved Game .MYW MyWorld Education Drawing .MZ MOZART Music Document .MZB MegaZeux Board .MZF SHARP MZ-series Emulator File .MZP MOZART Percussion File .MZQ SHARP MZ-series Emulator QuickDisk File .MZS SHARP MZ-series Emulator File .MZT MOZART Template File SHARP MZ-series Emulator File .MZX MegaZeux World .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .N1E OM2 OMALI NENA Encrypted Document Version 1 .N2E OM2 OMALI NENA Encrypted Document Version 2 .N2P Net2Phone File .N3E OM2 OMALI NENA Encrypted Document Version 3 .N4E OM2 OMALI NENA Encrypted Document Version 4 .N64 Nintento 64® Emulation ROM Image MiMiX Emulator .NA2 Netscape Communicator Address Book .NAB Novell Groupwise Address Book Netscape Communicator Address Book .NAD Noder File (Polish) .NAI WinINSTALL File .NAM MS Office Name File (often DISPLAY.NAM - text description) .NAN Nanoscope File .NAP NAP Metafile Vector Image Napster Music Security Definition File [How It Works] EnerGraphics VideoShow File Electrical Network Analysis and Planification .NASB TheWord & Bible Companion New American Standard Bible .NAV MSN Application Extension .NB Nota Bene Text File Mathematica Notebook .NC Graphics File Numerical Control Machine Instructions .NCB MS Developer Studio File .NCC Computer Numeric Control File NetControl V1 1999 (freeware network health probe) .NCD Norton Change Directory NTI CD-Maker File CoverDesigner [XnView] .NCF Netware Command File Lotus Notes Internal Clipboard .NCH Outlook Express Folder File [Buy Office XP at Shop.Microsoft] On Hold Message/Music File .NCR NCR Image [XnView] .NCT CoverDesigner [XnView] .NDB Intellicom Network Database .NDL Lotus Notes .NDO 3D Low-polygon Modeler .NDS Indiana Jones and the Infernal Machine Saved Game .NDX Index (usually dBase compatible) [File Structure] .NE1 OM2 OMALI NENA Document Version 1 .NE2 OM2 OMALI NENA Document Version 2 .NE3 OM2 OMALI NENA Document Version 3 .NE4 OM2 OMALI NENA Document Version 4 .NEB Nortec H.E.L.P. (humidity calculations) .NED MSN Application Extension .NEF Raw Graphic File Format for Nikon Digital SLR Cameras [XnView] .NEO Neochrome (ST & TT) [XnView] .NES Nintendo Entertainment System ROM Image .NET Network Configuration OrCad Netlist Output File .NEW New Information (e.g., WHATS.NEW) .NEX Nexcon System File (Nexcon is a shell replacement) .NFF WorldToolKit Neutral File Format [Format] .NFO Folio Infobase Text File [Open in text editor] MS System Info File (XML format) Warez Group Info File .NG Norton Guide Online Documentation .NGF Enterasys Networks NetSight Generated Format File .NGG Nokia Group Graphics [XnView] .NGS NGSSniff File .NH NetHack Defaults File (defaults.nh and/or NHAccess.nh) .NHF Nero HFS-CD Compilation Nero File (CD burning/design software) .NICK Office Data File .NIL Norton Icon Library File .NIF NetImmerse File Format .NITF National Imagery Transmission Format [XnView] .NIV TheWord & Bible Companion New International Version Bible .NJP njPipes Compiler File (generally java or NetRexx code) .NJX NJStar Document .NK2 Office Data File .NKJV TheWord & Bible Companion New King James Version Bible .NLB Oracle 7 Data .NLD ATI Radeon Video Driver File .NLM Netware Loadable Module LogoManager for Nokia Phones (format for Nokia phone images) [XnView] .NLS Code Page National Language Support .NLTRACK NoLimits Rollercoaster Simulator Track File .NLU Norton Live Update E-Mail Trigger File .NLX FormWorx Form .NMA Normalised Extinction Corrected Differential Photometry .NMD SwordSearcher File .NMI SwordSearcher File .NMO Virtools Behavioral Objects .NMS Numega Softice's Loader File (includes debugging info) Virtools Graphical Scripts .NNB newnovelist Story Outline .NNI ANNI Artificial Neural Network Investing .NOB VersaPro Word Exchange File Vampire: La Mascarade Archive [Dragon UnPACKer] .NOD Noder File (Polish) .NOL Nokia Operator Logo [XnView] .NON Star Wars - Tie Fighter Mouse Options .NOR ATI Radeon Video Driver File .NOT ActiveNote Post-It-Notes Acrobat Spelling File .NOW Text File (e.g., README.NOW) .NP Nokia Planner Project Schedule Cliq Accessories Notepad Text [Linux Suite PDF Description] .NPD Noder File (Polish) .NPI dBASE Application Generator Source .NPK MikroTik RouterOS Upgrade Package .NPL DART Pro 98 Noiseprint Info .NPM Nokia Picture Message Neopaint Mask [XnView] .NPT DART Pro 98 Noiseprint Archive Import .NRA Nero Audio-CD Compilation Nero File (CD burning/design software) .NRB Nero CD-ROM Boot Compilation Nero File (CD burning/design software) .NRG Norton Registration Entries Nero CD-Image Nero File (CD burning/design software) IsoBuster File .NRH Nero Hybrid CD-ROM Compilation Nero File (CD burning/design software) .NRI Nero ISO CD-ROM Compilation Nero File (CD burning/design software) .NRL iManage File .NRM Nero Mixed-Mode-CD Compilation Nero File (CD burning/design software) .NRSV TheWord & Bible Companion New Revised Standard Version Bible .NRT Nokia RingTone .NRU Nero UDF/ISO CD-ROM Compilation Nero File (CD burning/design software) .NRV Nero Video-CD Compilation Nero File (CD burning/design software) .NS2 Lotus Notes 2 Database .NS3 Lotus Notes .NS4 Lotus Notes Database .NS5 Lotus Notes Domino File .NSB Novaschem School Schedule .NSC Noder File (Polish) Windows Media Station File (used to gather info for WMP to play content) [Security patch] .NSD NRG Site Database .NSF Lotus Notes Database NES Sound File [Winamp (plugin), Meridian, Nosefart] .NSG Lotus Notes .NSH Lotus Notes .NSI Nullsoft Install System Script .NSO NetStudio Easy Web Graphics File .NSP Multi-Speech Sound File .NST Audio File Noise Tracker Music Module .NSX HiPer-Six Index File .NT Windows NT Startup File .NTF Lotus Notes Database Template .NTO NTOScanner (TCP port scanner) .NTP Neato CD Labels .NTR Netrun Executable Text File .NTS Norton Tutorial Netsend Executable Text File .NTW LVNet - Low Voltage Networks Analysis .NTX Clipper Index .NTX Web Audio File Network Terminal Accelerator Adapter Card Configuration Information CARIS Marine Navigation Info .NTZ InVircible Directory Integrity Information .NUF Procomm Plus New User Message .NUL Grand Theft Auto (Playstation 2) Game File .NUM Guitar Chords in Nashville Numbering System Format [On-line Guitar Archive] .NV Juno Access Number Info File Visicontrol MVS-20 Non-Volatile Memory Backup File (Ver A4Tech Scanner Graphic .PMD Pagemaker File .PME Plazmic Media Engine File .PMF ArcReader GIS Mapping File .PMG Pagemaker Group File (EPS graphic) Paint Magic [XnView] .PMI Pegasus Mail Message Folder Index File .PML NT4 Performance Monitor Log File Pegasus Mail Distribution List PADGen Program Information Windows Performance Monitor File .PMM Pegasus Mail Mail Message Folder Amaris BTX/2 Program .PMO Print Master Gold Text .PMP Sony DSC-F1 Cyber-shot [Acdsee] [XnView] .PMR Windows Performance Monitor File .PMW Windows Performance Monitor File .PN3 Harvard Printer Driver (Harvard Graphics taken over by Serif) .PND DATAIR Pension System Pending File .PNF Precompiled Setup Information (Temporary file seen during installs) .PNG Portable (Public) Network Graphic (proposed GIF replacement) [XnView] [IrfanView] PaintShop Pro Browser Fireworks Image File .PNL PEERNET Label Designer File .PNM PBM Portable Any Map Graphic [XnView] .PNR PEERNET Label Designer File .PNS PEERNET Label Designer File .PNT MacPaint Bitmap Graphic [XnView] Paperport Thumbsview MarkMail Qwk Reader Pointers World Data Bank II Country Data File (derived from CIA data) .PNTG MacPaint Bitmap Graphic [XnView] .PNU PEERNET Label Designer File .PO2 STABCAL (stability calculation for aqueous systems) File .PO3 STABCAL (stability calculation for aqueous systems) File .PO5 STABCAL (stability calculation for aqueous systems) File .POC PocoScript File .POD Terminal Velocity Archive [Dragon UnPACKer] .POG Descent2 File .POH Optimized Geoworks .GOH File .POL Music File AscToHTM Policy File Windows Policy File .POLICY Java Policy File .POO Poo Patrol Game File (unverified) .POP dBase Popup Menu PopMail Message Index .POS ProCite Output Styles QuickPOS IIF File (see IIF above) .POT PowerPoint Template [Buy Office XP at Shop.Microsoft] .POV Persistence of Vision Ray-tracer .POW PowerChords Chord Chart .PP Compressed Amiga Archive File .PP2 Curious Labs Poser Prop File .PP4 Picture Publisher .PP5 Picture Publisher .PPA PowerPoint Add-in [Buy Office XP at Shop.Microsoft] .PPB WordPerfect Print Preview Button Bar .PPD PostScript Printer Description .PPF Turtle Beach Pinnacle Program File Jasc Paint Shop Pro 7 Preset File Micrografx Picture Publisher File (Micrografx now part of Corel) PlayStation Patch File .PPG MS PowerPoint Ppresentation Professor Franklin's Photo Print Gold .PPI MS PowerPoint Graphics File [Buy Office XP at Shop.Microsoft] .PPJ Adobe Premiere Video Editing File .PPL Harvard Polaroid Palette Plus ColorKey Driver (Harvard Graphics taken over by Serif) .PPM PBM Portable Pixelmap Graphic [XnView] [IrfanView] .PPMA Portable Bitmap [XnView] .PPO Clipper Preprocessor Output .PPP Serif PagePlus Publication Enfocus Preflight Profile Parson Power Publisher Punk Productions Picture [XnView] .PPR Cognos PowerPlay OLAP Multidimensional Cube .PPRINT Pics Print File .PPS PowerPoint Slideshow [XnView] [Buy Office XP at Shop.Microsoft] .PPT PowerPoint Presentation [XnView] [Buy Office XP at Shop.Microsoft] .PPX Serif PagePlus Publication Cognos PowerPlay OLAP Reporting .PPZ PowerPoint Packaged Presentation [Buy Office XP at Shop.Microsoft] .PQ Adobe Pagemaker Default Printer Style .PQA Palm Query Application File (database for wireless access) .PQI Power Quest Drive Imaging Software .PQW Corel Presentations 9 Runtime .PQX Power Quest DRive Image Index .PR EROSION 3D Precipitation Parameters [Format (pdf)] Sun Icon/Cursor [XnView] .PR1 OzWin CompuServe E-mail/Forum Access Purged Message File .PR2 Persuasion Presentation dBase IV Printer Driver Proteus Session (personal light and sound stimulation system) .PR3 dBase IV PostScript Printer Driver Aldus Persuasion Presentation .PRB xyALGEBRA File .PRC Palmpilot Resource File [File Format] Picture Gear Pocket [XnView] .PRD Printer Driver .PRE Freelance Presentation MS Programmer's WorkBench Settings .PREFS Preferences File (various) .PRF Preferences File (various) dBase IV Printer Driver Monarch Portable Report File (data mining) Profiler Output PICS Rules File Polychrome Recursive Format [XnView] Fastgraph Pixel Run Format Grahics .PRG Program File (various) OzWin CompuServe E-mail/Forum Access Purged Message File WAVmaker Program Atari Program SHARP MZ-series Emulator File SpecEm Snapshot .PRI LocoScript Printer Definitions Prisms [XnView] .PRJ Project File (various) 3D Studio File HitPlayer Advanced Playlist File Monarch File (data mining) .PRK Tony Hawk's Pro Skater 2 Saved Park CampgroundMaster/ResortMaster Database .PRL Process Revolution Object Library File (Diagrams, Process Maps, Flow Charts) .PRM Parameter File .PRN Printer Text File (various) HP Printer Control Language [SwiftView] DataCAD Windows Printer File XYWrite Printer Driver PostScript File .PRO Guitar Chord File [On-line Guitar Archive] PROLOG Program File Creamware Pulsar Audio File Sid Meier's SimGolf .PRP Palace Prop File InstantDB Database File .PRS Printer Resource File WordPerfect Printer Resource Font File dBase Procedure Harvard File (Harvard Graphics taken over by Serif) .PRT Printer Configuration (various) Printer-formatted File SCEdit Part File (Roland Sound Canvas sound modules; MIDI-related) Unigraphics Part File (CAD modeling data) CADKEY Part File Pro/ENGINEER Model File Associated with the W32/Parrot-A worm; particularly if found in the Windows directory along with .EXE files of the same root name. Process Revolution Template File (Diagrams, Process Maps, Flow Charts) .PRV PsiMail Internet Provider Template Previous Version (used for files that change) .PRX Foxpro Compiler Program Process Revolution Diagram File (Diagrams, Process Maps, Flow Charts) .PRZ Freelance Graphics 97 File .PS PostScript [Ghostscript] [XnView] .PSB Pinnacle Sound Bank Project Scheduler Configuration File .PSD Photoshop Format [XnView] [IrfanView] Apple Viewer File DESIGN II for Windows General Flowsheet (Refining Process Simulation) .PSE IBM Printer Page Segment Bitmap [XnView] .PSF Chiwriter PostScript Printer Font PhotoStudio Graphic [XnView] .PSH Punch Home Design Series CAD Data File .PSI PSION A-law Audio .PSM Turbo Pascal Symbol Table Protracker Studio Module Format Epic Games Sound Data SolidEdge CAD File PrintShop Mail (desktop publishing) .PSMDOC PrintShop Mail (desktop publishing) .PSMODEL Delcam Powershape (3D CAD) .PSN Post-it® Software Notes .PSP PaintShop Pro Image [XnView] [IrfanView] Project Scheduler Planning File Prodea Synergy Procedure .PSR Project Scheduler Resource File .PSS Sony Playstation Game File Axialis Screen Saver Producer File .PST MS Outlook Personal Folder File Ulead Pattern [XnView] .PSW WinXP Backup Password File .PSX Dirty Little Helper Chat File X-Plorer/X-Ploder, Cheat Machine, etc. Single Game Save .PSY PLD2 System File Psychedelic Windows Products .PT Kodak Precision Transform [Download] PassMark PerformanceTest File .PT3 Harvard Device Driver (Harvard Graphics taken over by Serif) PageMaker Template .PT4 PageMaker Template .PT5 PageMaker Template .PTB Power Tab Guitar Tablature Editor PubTach Batch Works Script .PTC NRG Symphonie Patch File .PTDB Peachtree Accounting Database .PTH 4D Database Windows Pathname Document .PTI IBM Configurator Configuration .PTK Red Alert 2 File .PTM PolyTracker Music Module MS MapPoint Map PubTech BatchWorks Macro .PTN PaperPort Thumbnail Images (Hidden file: PPTHUMB.PTN) .PTP Act! Modem Sync File .PTR QMail Qwk Reader Pointer .PTS Infinity Engine Game Tileset Halflife Map Creation Debug File .PTT MS MapPoint Template .PTX E-Transcript of Court Proceedings [Viewer] .PUB PGP Public Key Ring Ventura Publisher MS Publisher Document The Sims (Maxis) Family Data Print Perfect Gold Template .PUBHTML MS Publisher HTML Document .PUBMHTML MS Publisher Archived HTML Document .PUD Warcraft II PUD Map [PUD Browser] [PUD Format] .PUF Puffer Encrypted File (File & E-mail Encryption) .PUT Instalit Script .PUZ Across Lite Crossword Puzzle [FAQ] Packed MS Publisher File .PVA Hauppauge DVB-Software .PVL Instalit Library .PVS Scarlett Expert System Compiler Reserved Words File (Scarlett is not presently available) .PVT Local Fidonet Pointlist .PW Professional Write Text File .PWA Password Agent File .PWC COSMI Street Maps and Vacation Planner .PWD Pocket Word Document AutoCAD Password File (ACAD.PWD) Password Pro File .PWF ProCite Workforms .PWI Notes for Windows CE .PWL Password List .PWP Photoworks Image File Professional WritePlus Document Seattle Film Works Multi-image File (Actually MGI PhotoSuite File) [Filmworks Viewer] [XnView] .PWT HotDog PageWiz Template MS Pocket Word Template File Autocad Publish-to-Web Template .PWZ PowerPoint Wizard [Buy Office XP at Shop.Microsoft] .PX Primary Index Paradox Primer Database Index .PXA Pixia Color Painter File [Japanese] [XnView] Pegs [XnView] .PXB Pixibox [XnView] .PXD eJay Mixer File .PXE Partial XML Envelope .PXI Pixie File (scalable vector images viewed with an applet) Note: The file $$d2k.pxi is associated with a Trojan .PXL Pocket Excel Spreadsheet .PXN PictureWorks PhotoEnhancer Graphic Image (Kodak format not now supported) .PXR Pixar Picture [XnView] .PXS Pegs [XnView] .PY PYTHON Script Yahoo Saved Messages Oracle Batch Procedure .PYC Compiler PYTHON Script .PZ2 Curious Labs Poser Pose File .PZ3 Curious Labs Poser Document .PZA MGI PhotoSuite II/III/4 Album File .PZC GraphPad Prism Script .PZD Pizazz Plus Defaults .PZF GraphPad Prism Project .PZL Puzzle [XnView] Lode Runner Game Puzzle .PZM GraphPad Prism .PZO Pizazz Plus Overlay .PZP Pizazz Plus Palette MGI PhotoSuite II/III/4 Project File [XnView] .PZS Pizazz Plus Settings MGI PhotoSuite II/III/4 Slide Show File .PZT Pizazz Plus Transfer File GraphPad Prism Template .PZX Pizazz Plus Swap File .PZZ Curious Labs Compressed Poser File .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .Q0 Q0 Graphic [XnView] .Q00 Quicken 2000 File .Q01 Quicken 2001 File .Q1Q LunarCell Plug-in File .Q98 Quicken 98 File .Q99 Quicken 99 File .Q9Q BladePro Graphic Plugin File .QAB QABUTIL File SYBYL Binary Field Files .QAD PF QuickArt Document .QAG Norton Desktop Quick Access Group .QAP Omnis Quartz Application File .QAX ExpressTracker Data File .QB1 Quicken File .QBA QuickBooks File .QBB QuickBooks for Windows Backup File .QBD Keyboard Layout .QBE Example Query (Query By Example) dBase IV Saved Query Quattro Pro Saved Query .QBL Business Lawyer Document .QBO dBase IV Ordered Query .QBS MS Quick Basic Program File .QBW QuickBooks for Windows File Quicken File .QCB MS Combat Flight Simulator Quick Combat Editor File .QCD QuarkCopyDesk SE Cliq Accessories Phonebook Data [Linux Suite PDF Description] .QCF Q-emuLator (a Sinclair QL emulator) QuickLogic Constraint File .QCH Quicken for DOS ver 2 Data File SSI Dark Queen of Krynn File .QCI Massively Parallel Quantum Chemistry Program File Cliq Accessories Phonebook Index [Linux Suite PDF Description] .QCK Quick Charts File Quick Foram Count File VAX CRYSTALS Chemical Crystallogaphy File QuickCard File Jigsaw 2 Astrological Tool File .QCM 3164 Emulator Quick Command File QUCM Application File (Link is PDF file) (interface CATERPILLAR CCM devices to POWERLOGIC system) .QCP Qualcomm PureVoice File .QCS CADQC Standard File .QCT Memory-Map File (Navigation software for digital maps) .QD SHARP MZ-series Emulator File .QD? Omnis Quartz Data File Segment (can be 0 to 9) .QDAT Quicktime Installer Cache .QDF Quicken for Windows Data File .QDI Dictionary Quicken Data File .QDK Quarterdeck QEMM File .QDT QuickBooks UK Accountancy Data File Quicken Data File Question Mark Desigener Test File Quark Xpress Dictionary File .QDV Steve Blackstock Giffer Graphics File Random Dot Software QDV Graphic [XnView] .QEF Excel Query [Buy Office XP at Shop.Microsoft] .QEL Quicken Electronic Library File .QEM Expensable Report .QEP IRMA Wordstation for Windows .QEX ExpensAble Data File .QFI QuickTime Image .QFL Family Lawyer Document (Now with Learning Company from Quicken) .QFN QuickTime Font File .QFX Quick Link Fax .QIC Backup Set [Note: People report trouble moving .QIC backup from Win9x to WinXP. See the Computer Knowledge QIC page for more info.] .QIF Quicken Interchange Format QuickTime Image .QIX Quicken for DOS ver 2 Data File .QLB MS C Quick Library .QLC PostScript Help File .QLE QOOLE (Quake Object Oriented Level Editor) .QLF Family Tree Maker Genealogy File .QLP QuickLink Printer Driver .QM Quality Motion File .QM4 QMail Mail Door Option or Services File .QMD Quicken for Windows ver 5,6 Data File .QML Quicken for DOS ver 2 Data File .QMR OzWin CompuServe E-mail/Forum Access Quickscan History .QMT Quicken Memory List .QN2 QuickNote File .QNA High ASCII Quake Name Maker .QNC Cliq Accessories Notepad Customization [Linux Suite PDF Description] .QND Cliq Accessories Notepad Data [Linux Suite PDF Description] .QNI Cliq Accessories Notepad Index [Linux Suite PDF Description] .QNM High ASCII Quake Name Maker .QNT Chromeleon Quantification Method .QNX Quicken Indexes .QPB Quicken Payroll File .QPD QP Software Dynamic Plug-in (expected web release 1 Mar 2002) .QPR OS/2 Printer Queue Driver Foxpro Relational Query .QPS QP Software Application File (expected web release 1 Mar 2002) .QPW Quattro Pro Project File .QPX Foxpro Ordered Query .QQT Quick Qard Technology Qardware Definition File .QRD BI/Query Query Result (used to be Andyne GQL) .QRP Centura Report Builder File Liberty for Windows Report File Dosh Software File .QRS WordPerfect Equation Editor .QRT QRT Ray Tracing Graphic [XnView] .QRY dBase IV Query MS Query BI/Query Query .QS9 OzWin CompuServe E-mail/Forum Access Scan Result File .QSC Pxyl Visuals Chart .QSD Quicken for Windows Data File .QSL OzWin CompuServe E-mail/Forum Access Forum Quickscan List .QSM QuadriSpace Model Format File (2D/3D presentations) .QST Quake Spy Tab File .QT Quicktime Video .QTC Incite Media Assistant File .QTF Qtracker Filter (parameters used to filter music or game servers) .QTI QuickTime Image [XnView] .QTIF QuickTime Image [XnView] .QTK Apple Quicktake File (PICT variant created by Quicktake 100/150 camera. Quicktime player needs QuickTake driver to show.) .QTL Quicktime Movie .QTM QuickTime Movie .QTMP Qtracker Mapshot Pack (images of game levels) .QTP QuickTime Preferences Astra Quicktest Report .QTPF QuickTime PreFlight Text .QTPP Qtracker Program Package (Used to distribute updates) .QTS Macintosh PICT Image QuickTime Image .QTSK Qtracker Skin (PlayerWatch skin file) .QTW QText File (mixed English/Hebrew) .QTX QuickTime Image .QUE Task Scheduler Queue Object CuteFTP Queue File .QUICKEN Quicken Spreadsheet .QVM Quake File (UI.QVM or GAGAME.QVM in VM directory) .QW Symantec Q&A Write Program File [Support] .QW5 Quicken 5 File .QW6 Quicken 6 File .QWB MS Money Quotes WriteBack Import File .QWK QWK Reader Message File .QWP Quiptics Puzzle File .QXB Quark Xpress Books File .QXD Quark Xpress File .QXL Quark Xpress Element Library .QXT Quark Xpress Template File .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .R Pegasus Mail Resource File Rebol Script Progress Compiled Program File Ratfor FORTRAN Preprocessor File [FORTRAN] .R?? RAR Compressed File (?? can be 00 to 99) .R1A Yamaha RM1x Dance-Music Workstation .R2A Yamaha RS7000 Music Production Studio Sequencer .R2D RISA-2D Simple Analysis & Design .R2K Repertoire 2000 Music Database .R2P Yamaha RS7000 Music Production Studio Sequencer .R33 Train Simulator Game File .R3A Yamaha RS7000 Music Production Studio Sequencer .R3D RISA-3D 3D Analysis & Design .R3P Yamaha RS7000 Music Production Studio Sequencer .R64 Top Secret Crypto File .R8 RAW Graphic File Flight Simulator Texture File .R8L LaserJet Landscape Font .R8P LaserJet Portrait Font .RA RealMedia File [IrfanView] .RAD Radiance Scene Description Format [XnView] .RAM RealMedia Metafile .RAN Dexterpen File (Parametric 2D design and calculation) .RAP Rapanalyst File (Rapid Application Predictive Technology Organization Resource) Rapidocs Document .RAR RAR Compressed Archive Java JCA Resource Adapter Module .RAS Sun Raster Graphic [XnView] [IrfanView] Cals Raster File [SwiftView] Max Payne Data File Sky Subtracted Data .RAST Sun Raster Graphic [XnView] .RAT Rating System File Rats Data Nimbus 7 SAMS Data File (radiance data) .RAW RAW RGB 24-bit Graphic [XnView] Raw Signed PCM Data Sentry 2020 Encryption File VitaGraph File (medical testing related) Nimbus 7 SAMS Data File (radiance data) HSI Raw File [XnView] Spectrum Raw Memory Dump V41/eV41 Program Files .RAX Image File .RB RocketEdition File Ruby Interpreter Program .RB1 R:Base Data File .RB2 R:Base Data File .RB3 R:Base Data File .RBB Top Secret Crypto File .RBF R:Base Data File Oracle Backup File MS Rollback File (backup of existing file stored in hidden config.msi directory) .RBH RoboHelp Configuration .RBM Propellerhead ReBirth Modulation v2.0 Rail Baron Player Map .RBN Richard's Bridge Notation Real Sound File .RBO Sometimes associated with the Magistr.B Worm [Worm Info] .RBPM POrtable Bitmap [XnView] .RBS Propellerhead Software ReBirth Song Rutherford Backscattering Spectroscopy Analysis Package (RUMP) MS Rollback Script (see .RBF) .RBX XStream Multimedia Simulation Format .RBZ Rail Baron Player Saved Game .RC Borland C++ Resource Compiler Script File Emacs Configuration .RC2 ReCycle v.2 Audio Loop .RCD PC Anywhere Recorded Session File .RCG Netscape Newsgroup File .RCH SWAT Reach Output File (river basin scale model) .RCM Logos Library System 2.x Verse Map .RCP Recomposer's MIDI Sequencer Music File .RCS Colin McRae Rally Save Game File (unverified) .RCX Lego Mindstorms Robotics Invention System .RCY ReCycled Audio Loop .RD1 Descent1 Registered Level File DATAIR Retirement Document System Data File .RD2 DATAIR Retirement Document System Custom Text File .RD3 Ray Dream Designer Graphics CorelDream 3D .RD4 Ray Dream Designer Graphics .RD5 Ray Dream Designer Graphics .RDA Oracle Storage Area File .RDB TrueVector Rules Database ZoneAlarm Rules Database (IAMDB.RDB file) Gear CD Suite File Oracle Database Root File .RDF Resource Description Framework File Geoworks UI Compiler Source Code Chromeleon Report Definition Workshare Synergy Collaboration Response File Burli Newsroom System File Oracle Report Binary Source Rate Description File (BLDRATE.EXE output) .RDI Device-independent Bitmap .RDL Descent Registered Level RadioDestiny Radio Stream Symbian Recogniser Library (allows OS to recognize document formats) .RDP Remote Desktop Connection .RDS Ray Dream Studio File .RDT RDT Tracking File (capture design process and manage the system requirements) .RDX Reflex Data File .REC Sprint Record File EpiInfo Data Windows Recorder Macro RapidComm Voice File .RED Calrion Modula-2 Path Data .REF Cross Reference .REG Registration Data (various) .REGET ReGet Deluxe Downloader .REM Annotation (remark) .REP Text Document Report File (various) Blizzard Entertainment Replay File Qwk Reader Reply .REQ Request .RES Resource File (various programs) Championship Bass Archive [Dragon UnPACKer] Evil Islands Archive [Dragon UnPACKer] Half Life Game Map [Maps] [Viewers] .RESX MS .NET XML Resource Template .REV Geoworks Revision File Workshare Synergy File WinRAR Recovery Volume File .REX REXX Program File Oracle Report Definition ReCycled Audio Loop Export File 4D Database Windows Client Local File .REZ Resource File Aliens and Predator 2 Game File Blood 2 Archive [Dragon UnPACKer] No One Lives for Ever Archive [Dragon UnPACKer] Sanity: Aiken's Artifact Archive [Dragon UnPACKer] Shogo Archive [Dragon UnPACKer] .RF Sun Raster Graphic RealFlash Clip .RF? SmartWare Compiled Project File (requires login) .RFB RoboForm .RFD RecogniFORM Form Definition Emperor: Battle for Dune Archive [Dragon UnPACKer] .RFF Maggi Graphic File .RFG RFG Integrator System Database .RFH RFG Integrator Householding Database Maxagrid CTM Refresh File (text format) .RFL RISAFloor Analysis & Design Reason Sound File Guardian Database Roll-forward File .RFP AI RoboForm Passcard Database .RFT IBM DisplayWrite Revisable Format Text AI RoboForm Form Database .RGB Q0 Graphic [XnView] Silicon Graphics RGB [XnView] .RGBA Silicon Graphics RGB [XnView] .RGI RealArcade Game Installer (not secured) .RGL Scarlett Expert System Compiler Rules File (Scarlett is not presently available) .RGN Championship Manager Game File .RGP RealArcade Game Package .RGS RealArcade Game Installer (secured) .RGX ReaGeniX Code Generator Symbol Table .RH Borland C++ Resource Header File .RI Lotus File .RIA Alpharel Group IV Raster Graphics File .RIB 3D Reality Renderman Format Graphics .RIC Ricoh FAX Graphic File .RIF Fractal Painter Bitmap .RIN RappInfo PostScript Converter Configuration File .RIP Remote Imaging Protocol .RIX ColorRIX VGA Paint File [XnView] RIX Virtual Screen .RL The 7th Guest Archive [Dragon UnPACKer] .RL1 Descent1 Registered Level File .RL2 Descent2 Registered Level .RL4 Bitmap Graphics .RL8 Bitmap Graphics .RLA Advanced Visualizer File Wavefront Raster Image .RLB Harvard Graphic File (Harvard Graphics taken over by Serif) .RLC Image Systems CAD Overlay (RLC2 Graphic) [XnView] Scanner One-bit/pixel Grahpic Output .RLE Graphic (Run Length Encoded) [XnView] [IrfanView] Utah Raster Image [XnView] .RLZ Realizer Source Code .RM RealMedia File .RMD RegMaid Document .RMF Rich Map Format (3D Games) Acrobat File .RMI MIDI File [IrfanView] .RMJ Real Jukebox File .RMK Clipper RMake Make File .RML Redline Markup Language File (XML-based exchange of design markup and redline information) .RMM RealPlayer File .RMR Resume Maker File .RMS AutoCAD Data File for Boss RMS (River Modelling System) Secure RealMedia File .RMX RealJukeBox MP3 File .RN Nota Bene XPL Program .RND AutoCAD Rendering Slide AutoShade Format .RNG Nokia Ringtone File Top Secret Crypto File .RNL GTX Runlength Raster Graphics .RNO VAX Runoff File .RNX RealPlayer File .ROI Actuate ReportBlast File .ROL Adlib Music File .ROM Nintento 64® Emulation ROM Image (actually most any emulator or BIOS flasher) MZ700 Emulator (MZ700.ROM) .ROQ Medal of Honor - Allied Assualt .ROV Rescue Rover Data .ROX Actuate ReportBlast File .RP RealPix Clip Rainbow Painter [XnView] .RP? RescuePro Physician Invoice File (? can be 0-9) .RPB Automotive Diagnostic File .RPBM Portable Image [XnView] .RPC Rich Photorealistic Content (ArchVision, Inc.) [Info] .RPD Rapidfile Database RPV Printing System File .RPGM Portable Greyscale [XnView] .RPIN Adobe InDesign Import/Export Filter .RPJ Relex (Reliability Analysis Software) .RPK Rippack File .RPL Replica Text File .RPM RedHat Package Manager (Linux Library) RealMedia Player File RunPaint Multicolor Graphic [XnView] .RPNM Portable Image [XnView] .RPPM Portable Image [XnView] .RPS Propellerhead Software Reason Song .RPT Report (various) .RPV Real Player Visualization File (animated effects to beat of music) RPV Printing System File Rebel Poker Player File (Note: Strip poker with nude graphics) .RPW RPWiz Project (slide show development) .RPY Star Wars - Tie Fighter Media Grand Prix Legends Racing Simulation Game File .RQY MS Excel OLE DB Query File [Buy Office XP at Shop.Microsoft] .RR Railroad Tycoon .RRD ERDAS Imagine File (remote sensing) .RRS Road Rash Save File .RS Amiga Reassembler Resource Data File EROSION 3D Event File [Format (pdf)] Sun Raster Graphic [XnView] .RS_ Macintosh File Resource Fork .RSB Rogue Spear Bitmap Red Storm Image Format [XnView] .RSC Resource File SymbianOS Application Resource File (application resources) .RSF Mediafour MacDrive Macintosh Resource Fork .RSL PC Tools Resources Library Borland's Paradox 7 Report Adobe Pagemaker File .RSM RuneSword II Game Resume (often an MS Word file) WinWay Deluxe Resume File .RSML Real Player File .RSN Propellerhead Reason Audio File .RSP Responce Text File MS ODBC Driver Configuration File (Installation direcives used setting up MS Universal Data Access services) Rockwell Software Logix 5 File Workshare Synergy Response File MDaemon File .RSR 4D Database Resource Fork File (.4D? for data fork) .RSS Rockwell Logix 500 SLC-5 Software .RST ANSYS Results .RT Real Media File .RTA RoboHelp Configuration .RTF Rich Text Format File (also used as Windows Help file script) .RTH ANSYS Results .RTK RoboHelp Configuration .RTL Text File NU 7.0 Runtime Library .RTM Real Tracker Music Module .RTP TurboTax Update File RTPatch Update Package Gerber Sign-making Software File .RTS RoboHelp Configuration RealAudio RTSL Document Realizer Runtime Library .RTX Reliacast Audience Manager Turnstile Mobile Phone Ringtone (extended ringtone format) .RUJ Oracle Recovery-Unit Journal .RUL InstallShield .RUN PC Tools Script Tools Program .RV RealVideo Clip .RVG Revit External Group File .RVI Revenant Archive [Dragon UnPACKer] .RVM Revenant Archive [Dragon UnPACKer] .RVN Riven Saved Game .RVP Microsoft Scan Configuration File C|Net CatchUp File Mime Type: application/x-mss-scancfg .RVS Revenant Archive [Dragon UnPACKer] .RVT Apache Rivet Tcl File IEX Workforce Management Report (text file) Incite Media Assistant File Revit Design Setup File VersaPro Reference View Table .RVW Review (may just be text file) .RWD Symphonie Raw Wind Data .RWG Random Word Generator .RWP IBM Configurator Report (if you don't have the program ask the sender to export to .RTF for you) .RWS Borland C++ Resource Workshop Data File .RWX RenderWare Script .RWZ MS Outlook Rules Wizard File .RX Reflex Database Driver EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E] .RXC WRQ Reflection X Connection .RXD Reflex Database .RXF Recipe Exchange Format (Resort Software format for chef/food & beverage manager data exchange) .RXH Reflex Database Help File .RXN MDL RxnFile (MIME type chemical/x-mdl-rxnfile) .RXR Reflex Database Report .RXS Reflex Database Screen Driver .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .S Assembler Source Code Scheme Source Code .S$$ Temporary Sort File .S$N Mindstore Digital Wallet File (M$A$W$.S$N) .S?? RAR Compressed File (?? can be 01 to 99 after .R99) .S01 WordPerfect Distribution File .S02 WordPerfect Distribution File .S03 WordPerfect Distribution File .S16 Sigames File .S19 Motorola Assembly-Language Program ASCII-HEX Data File .S28 Genesis or Sega32X Rom Image .S2P Sonnet File .S3D EverQuest File .S3I ScreamTracker v3 Instrument .S3M ScreamTracker v3 Module ScreamTracker v3 Sound File .S4T Patent Application Specification Authoring Tool (PASAT) File .S4W Patent Application Specification Authoring Tool (PASAT) File .S8 Simul8 Simulation .SA1 Panasonic e-wear MP3 Player File .SA4 STABCAL (stability calculation for aqueous systems) File .SA8 Street Atlas File .SAB ModelMaker File (3D scanner) .SAC Adobe Shared Asset Catalog .SAD Serveron Analyzer Data File Electronic Arts Black & White Game Sound File [Dragon UnPACKer] .SAF MusicMatch Jukebox Secure Audio File .SAH SETI@Home Data File .SAK Software Administration Kit (Customer Tracking for Shareware Authors) .SAL Soritec Data .SAM Ami Pro Text File Map File (HOSTS.SAM - Maps IP addresses to machine names) Signed 8-bit Sample Data CalTech PaleoMag Data File .SAN The Curse of Monkey Island Movie File Legacy of Kain Series Game File .SAR Phoenix Server Applications Standard Distribution Format (.JAR file in special directory) Sons Of The American Revolution Family Tree Creator Data Saracen Paint [XnView] .SAS SAS System File (statistical anaysis) .SAT ACIS Solid Model (any ACIS-based CAD program) .SAV Backup Saved File (various) Saved Configuration Info (various) .SB Audio File Raw Signed Byte (8-bit) Data .SBD Storyboard Editor Storyboard .SBF Superbase 95 File .SBI Sound Blaster Instrument File .SBK Emu SoundFont v1.x Bank Files Superbase 95 File Creative Labs SB AWE 32 Statfoot32 Soccer League Tracking File SWiSH Backup File (Flash animation) .SBL Shockwave Flash Object .SBM Hello Network HelloCombined Media Player (MultiPlatform Streaming Media Player) .SBN ArcView Optional Shape File (GIS-related) .SBP Superbase DML Program Scratchboard SetupBuilder Professional Projects File .SBR Source Browser Support File .SBS SWAT HRU Output File (river basin scale model) .SBT Superbase Record Notes .SBW Savings Bonds Wizard (U.S. Treasury program) .SBX ArcView Optional Shape File (GIS-related) .SC Framework Screen Driver Paradox Source Code Ingres Embedded SQL/C Source File .SC? ColoRIX Image (? can vary) [XnView] .SC2 Sample Cell SimCity 2000 City II PC Instrument Schedule+ File SAS Catalog MSX 2 Screen [XnView] .SC3 Harvard Screen Driver (Harvard Graphics taken over by Serif) SimCity 3000 File dBase Screen Mask File .SC4 RollerCoaster Tycoon Scenario Creative NOMAD MP3 Manager .SCA SCA Datafile Scala InfoChannel Script .SCANNER Scanner Output File (usually a bitmap image) - Note: I've had reports of this but cannot confirm .SCB Scala InfoChannel Published Script System Cleaner .SCC Text File Stamp Collector's Girl Friday Catalog File Source Safe File .SCD Graphic (SCODL Scan Conversion Object Description Language) Schedule+ File TurboTax Schedule File .SCE SoftCuisine Data Exchange File .SCF Windows Explorer Command Symphony Spell Checker Configuration Photo Soap2 File ScoreMaker Multimedia Show .SCG Septerra Core Saved Game .SCH Schedule+ File EAGLE Schematic File OrCad Schematics File P-CAD Schematic File Xlinix Foundation Schematic XML Schema .SCI ScanVec Inspire File ColoRIX Image [XnView] SciFax FAX [XnView] System Configuration Data .SCL SCALA Scale .SCM SchematicMaker (Topanga Software) File ICQ Sound Compressed Sound Scheme Scheme Program ScreenCam Movie Starcraft Map File .SCN Compressed Screen format TrueSpace2 Scene Pinnacle Studio Scene File (Info about scenes found in same-named .AVI) Scenario File For Many Games Including: Age of Empires, Age of Empires: Rise of Rome, Seven Kingdoms, SimCity Classic, SimCity 2000, SimCity 3000, SimCity 3000 Unlimited .SCO High Score (various) ObjectJ AuthorJ Saved Lesson .SCP Script (various) .SCR Faxview Fax Screen Saver Procomm Plus Screen Snapshot File Script (various) DOS DEBUG Input File (can be any extension but often .SCR) LocoScript Screen Font File Statistica Scrollsheet Movie Master Screenplay (DOS software replaced by Hollywood Screenplay) Sun Raster Graphic [XnView] .SCS StuffIt Saved Criteria OzWin CompuServe E-mail/Forum Access SYSOP File Samsung Q105 Phone Screen Saver Omron CX-Supervisor (Factory Automation) .SCT Foxpro Screen PC Tools Script Tools Scitex Continuous Tone Bitmap [XnView] SAS Catalog OzWin CompuServe E-mail/Forum Access Forum Section Names Windows Script Component Lotus Screen Capture Text .SCV ScanVec CASmate File .SCW Score Writer Document (music score) .SCX MS FoxPro Screen File ColorIRX Image File [XnView] Stanford Chart Starcraft Map File .SCY ReaGeniX Security File .SD Sound Designer I Audio .SD0 Dali Raw File [XnView] .SD1 Dali Raw File [XnView] .SD2 Sound Designer II Flattened File Sound Designer II Data Fork SAS Database Dali Raw File [XnView] .SD7 Daktronics Venus 7000 Electronic Sign Schedule .SD! OzWin CompuServe E-mail/Forum Access Custom Messsage Search Online .SDA StarOffice Drawing Fidonet Software Distribution Network Archive Description SoftCuisine Data Archive PGP Encrypted Executable .SDB Simply Accounting File Group Mail Subscriber Plug-in File MS Win2000 Security Configuration and Analysis Database .SDC StarOffice Spreadsheet .SDD StarOffice Presentation .SDF Standard Data Format Standart-Delay-Format (Chip design gatelevel-delay data exchange... e.g., Synopys to Modelsim) Schedule Data File System File Format Autodesk MapGuide Spatial Data Files .SDG Star Office Gallery [XnView] .SDI Fidonet Software Distribution Network Info .SDK Roland S-series Floppy Disk Image Autosketch Drawing .SDL SmartDraw Library OzWin CompuServe E-mail/Forum Access Custom Messsage Search .SDN Shell Archive Fidonet Software Distribution Network Compressed Archive .SDOC Sealed Word File [Unsealer] .SDP QuickTime Session Description Protocol File (resides on server; contains info about format, timing, & authorship of streamed media) Real Player File .SDR SmartDraw Drawing .SDS StarOffice Chart Raw Midi Sample Dump Standard File .SDT SmartDraw Template Dungeon Keeper 2 Archive [Dragon UnPACKer] Theme Park World Archive [Dragon UnPACKer] .SDV Semicolon Divided Values File .SDW StarOffice Text Raw Signed DWord (32-bit) Data Lotus WordPro Graphic .SDX Midi Sample Dump Standard Files Compacted by SDX .SDV Pinnacle Studio DV Video Editing Project .SE ScopeEdit Project File .SEA Macintosh Compressed Archive File [StuffIt] .SEB Franklin eBookMan Format .SEC Compressed Archive File Disney Animation Studio Secured Animation File PGP Secret Key Ring MP3 Music File (unverified) .SEE LISCAD Plus File .SEF Steganos Encrypted File .SEG Compressed File Segment .SEL PaintShop Pro Selection File .SEM ZX Spectrum-Emulator Snapshot .SEO ScopeEdit Object File .SEP TIFF Bitmap Separation .SEQ Atari Animation File TestStand Sequence File Bubble Chamber Sequential Instruction File Chromeleon Sequence List LifeForm File Stad File [XnView] Power Tracks Pro Music Sequencer File .SEQU Acrobat Sequence File .SES Digital Audio Editor File Clarion Modula-2 Session Data Hummingbird Exceed X-Session Shadow Security Scanner Session .SET Driver Set Image Settings Backup File Set Configuration (various) .SEU Serials 2000 Encrypted S2K Update .SEW Janome (New Home) Sewing Machine File Embroidery Design File [possibly read with Melco Sizer Software] .SEX Urban Chaos Game File .SF Sound File [Linux Player] OS/2 WPS Attribute Storage IRCAM SoundFile Powerhouse Subfile Data File (contents defined by .SFD dictionary) .SF2 Emu SoundFont v2.0 File Creative Labs Soundfont 2.0 Bank File .SFA Sonic Foundry Video Editor Audio File .SFD SoundStage Sound File Data Powerhouse Subfile Dictionary (describes .SF file contents) .SFE Split Files Shell Extension .SFF Fritz Fax-Print File Stage Scene File Structured Fax Format [XnView] .SFI Ventura Printer Font SoundStage Sound File Info SIS Framegrabber Graphics .SFK Sound Forge Peak Data File .SFL Ventura Printer Font LaserJet Landscape Font .SFM DART Pro 98 Soundtree Structure .SFN SPX Font .SFP Ventura Printer Font LaserJet Portrait Font .SFR Sonic Foundry Sample Resource .SFS StarOffice Frame PCL 5 Scalable Font .SFT Chiwriter Screen Font .SFV QuickSFV/WinSFV Checksum File Easy SFV Creator fsum (free command line checksum file creator/verifier) .SFW Seattle Film Works File (Actually MGI PhotoSuite File) [Filmworks Viewer] [XnView] [IrfanView] .SFX Self-extracting Archive .SG ABC Snap Graphics User File .SG1 Stanford Graphics .SGA SEG-A Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] .SGB SEG-B Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] .SGC SEG-C Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] .SGD SameGame Data File SEG-D Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] .SGF Smart Game Format StarWriter Document Sonique Document with Graphics .SGI Silicon Graphics IRIS Graphic File [XnView] [IrfanView] .SGIF Sealed GIF File [Unsealer] .SGL StarOffice Master Document .SGM SoftQuad XMetaL File .SGN Sierra Print Artist Sign .SGO SansGUI Object Library File (compiled class definitions and objects for building models) .SGP Statgraphics Plus Statistics SansGUI Project Model File (model configurations and input parameters defined by simulation users for simulation runs) .SGS SansGUI Schema Definition File (class schemas defined for a simulator) .SGT Hitman Game Sound File DirectMusic Producer Signature Keyboard Macro .SGU GJDV Word Processor Keyboard Definition File Band-in-a-Box File .SGW Settler GOLD for Windows Data File .SGY SEG-Y Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] .SH UNIX shar Archive File UNIX/LINUX Shell Script .SH3 Harvard Presentation (Harvard Graphics taken over by Serif) .SHADER Script File for Game Textures (ASCII file--but, it's easier if you use Photoshop) .SHB Corel Background File Document Shortcut File .SHD Print Spooler Shadow File .SHE Medusa CAD File [Outdated. Medusa CAD sold by PTC to CAD Schroer.] .SHG Hotspot Editor Hypergraphic .SHIFTS ARIA PIPP Chemical Shifts File .SHK Apple II Compressed Archive File .SHM WordPerfect Shell Macro .SHN Shorten Audio Compression File [Additional] .SHP 3D Studio Shapes File GIS Software Geographic Shape File [GIS info] (ArcView, et.al.) (JShape/FShape) 3D Modeling File (various) .SHR UNIX shar Archive File .SHS Shell Scrap Object File .SHTM HTML File Containing Server Side Directives .SHTML HTML File Containing Server Side Directives .SHW Corel Presentation WordPerfect Slide Show Show File .SHX AutoCAD Shape Entities GIS Software Geographic Shape Index File [GIS info] (ArcView, et.al.) (JShape/FShape) .SI SoftImage Image File [XnView] .SIB Sibelius Music File .SID Commodore64 Music File [Player] MIME type: audio/prs.sid LizardTech MrSID Photo [Free plug-in viewer] .SIF Windows NT Setup File Autodesk Spatial Index File .SIG Signature File Print Shop Sign File .SIK Backup File .SIM Simulation (various) (e.g. Setup for Nascar4) Aurora [XnView] PowerDVD File (powerdvd.sim) PC Finder 2002C (Trace stolen computers) .SIR SIR (Scientific Information Retrieval) Database (ver 1-3) BYU SIR [XnView] Solitaire Image Recorder [XnView] .SIS SymbianOS Installer File (application installation archive) .SIT StuffIt Compressed Archive File (Multiple platforms) Sinclair Snapshot .SITHQX StuffIt Compressed Archive File (Multiple platforms) .SIZ Oracle 7 Configuration .SJ1 Sega SJ-1 DIGIO [XnView] .SJF Split Files Shell Extension .SJPG Sealed JPEG File [Unsealer] .SJX Seljax Estimating and 3D Design .SKA PGP Secret Keyring .SKB QuickPOS (Point-Of-Sale) Standard Keyboard Layout File .SKCARD Sidekick File (now a discoutinued product of Starfish which maintains a FAQ) .SKD WinOrbit File AutoSketch File VEX Format File Max Payne Model File .SKF Autosketch .SKL Authorware Resource .SKN FileWrangler/SecurDesk!/ImageForge Graphic Skin eRocket eBook Skin The Sims (Maxis) 3D Body Mesh Skin Data Skantek [XnView] .SKR Microsoft ScriptIt .SKY ActiveSky Movie Clips for Palm OS .SKZ coverXP Skin File .SL S-Lang Program File PACT's Save Layout EROSION 3D Soil Parameters [Format (pdf)] .SLB AutoCAD Slide Library .SLC Telix Compiler SALT Script .SLD AutoCAD Slide STABCAL (stability calculation for aqueous systems) File .SLDASM Solidworks Assembly File .SLDDRW Solidworks File .SLDLFP Solidworks File .SLDPRT Solidworks File .SLF Shopcalc List File (Cabinet Door & Drawer Cutting List Calculator) Suppose Stand List File SLIDE: Scene Language for Interactive Dynamic Environments File SuperLink Folder Manager for Readers Mail Warden Segment Layout File (IMS Database related) SortWizard Export Format .SLG Chromeleon Audit Trail .SLI MagiCorp Side Service Slide .SLK Data Exchange File (Symbolic Link - Often used by Excel) Timeslips Lock File .SLL Sound File .SLM Microsoft Visual FoxPro .SLP Timeslips Data File .SLT Telix SALT Script Application Super Level Loader Snapshot [Format] .SLW Settler LITE for Windows Data File .SLY Parts of a Lilypond Guitar File (ASCII text) .SM Smalltalk Program File SoftSpoken Mailer Mailing List ScriptMaker Script Simentor Data File Samna Word Text File .SM3 DataCAD Symbol File .SMC Super Nintendo Game-console ROM Image [See ZNES or SNES9x] .SMCL Stata Saved Formatted Logs .SMD StarOffice Mail Sega Genesis/Mega Drive Emulator .SMF StarOffice Formula Smartfax Fax .SMI RealPlay SMIL File Self Mounting Image File (Apple Macintosh) .SMIL Synchronized Multimedia Integration Language [RealPlay] .SMK Smacker Compressed File .SML Simple Markup Language .SMM Ami Pro Macro .SMOV Sealed QuickTime Movie File [Unsealer] .SMP Sample or Samplevision Format Sound File [Linux Player] Ad Lib Gold Sample PhotoImpact Gallery File .SMP3 Sealed MP3 File [Unsealer] .SMRD Adobe InDesign Import/Export Filter .SMS MS Package Definition File (used now in place of .PDF) Sega Master System Emulator .SMT HiPer-Six Memo File SmartWare II Text File .SMWT Adobe InDesign Import/Export Filter .SMX Statistica Matrix Spreadsheet .SNA Mirage Microdrive Snapshot [Format] .SNAP Mirage Microdrive Snapshot [Format] .SNAPSHOT Mirage Microdrive Snapshot [Format] .SNB SigmaStat File .SNC Act! Modem Sync File .SND Sound Clip [IrfanView] Raw Unsigned PCM Data AKAI MPC-series Sample NeXT Sound Macintosh Sound Resource Heroes of Might & Magic 3 Archive [Dragon UnPACKer] .SNES Super Nintendo Game File (unverified) .SNG Midisoft Studio MIDI Song .SNI MDK Archive [Dragon UnPACKer] .SNK Strong Name Key File (part of the .NET architecture) .SNM Netscape Mail .SNO SNOBOL Program File Siege Editor Node .SNP Snapview Shapshot MS Access Snapshop [Viewer] (page of Access report preserves layout, etc.) CoffeeCup HTML Editor Snippet Computer Eyes Video Output .SNT MS Sticky Notes (accessory for Windows XP tablet PC edition - due end 2002) .SNX Second Nature Software Graphic Mirage Microdrive Snapshot Extended Version StarCraft Saved File .SO Oberlin DRAGN Graph Algorithm .SOA Sage MAS 90 Accounting Software File .SOC SociometryPlus Sociometric Group .SOE Shadows of the Empire .SOL Game Solution (various games) .SOM Paradox Sort Info Quattro Pro Network Serial Numbers .SOU SB Studio II Sound .SP Splint Compressed Archive File (UNIX) VgaSpec/Spectrum Snapshot [Format] .SPC Multiplan Program WordPerfect Temp File Interact Shark Port Code Save (SharkPort=code/game save xfer kit for PlayStation 2) SNES Audio file PKCS #7 Certificate Spectrum 512 Compressed File [XnView] .SPD Harvard Bitstream Typefaces (Harvard Graphics taken over by Serif) PostScript Printer Mini-driver Speech Data File Speedo Scalable Font .SPDF Sealed PDF File [Unsealer] .SPF Site Publisher Profile EnerGraphics Slide Presentation .SPG Sprint Glossary .SPH SDR99 Speech Recognition Task SPHERE Waveform .SPI Scanner Graphics .SPJ Site Publisher Project File .SPL Compressed Archive File Printer Spool File [MS Knowledgebase Article] Sprint Printer Driver Sample File Spell Checker Digitrakker Sample (by n-FaCToR) Shockwave Flash Object Split Files Shell Extension Infinity Engine Game Spell .SPM WordPerfect File .SPN WordPerfect Distribution File .SPO SPSS Statistical Program .SPP Sprint Printer File Serif PhotoPlus Native Format File .SPPT Sealed PowerPoint File [Unsealer] .SPR Sprint Document Letter Foxpro Generated Screen Program Sprite .SPS Sprint Screen Driver SharkPort File (transfers game saves from computer to PlayStation2) VAX/VMS Source Code Spectrum 512 Smooshed File [XnView] .SPT SPITBOL Program File Liquid Audio Player Secure Portable Track File MITAC Disk/System Management Utility Pack Support File .SPU Spectrum 512 [XnView] .SPW SigmaPlot Worksheet .SPX Foxpro Compiler Screen Program Screen Peace Extension .SPZ Spazz3d VRML File .SQ7 Daktronics Venus 7000 Electronic Sign Sequence .SQB SyQuest Backup .SQC Structured Query Language Common Code File [SQL] .SQL Structured Query Language Data [SQL] .SQM Operation Flashpoint Mission .SQR Structured Query Language Program File [SQL] .SQS Operation Flashpoint Script .SQZ Compressed Archive File .SR Sun Raster Graphic [XnView] .SR1 SIR (Scientific Information Retrieval) Database .SR2 SIR (Scientific Information Retrieval) Database Omron CX-Supervisor (Factory Automation) .SR3 SIR (Scientific Information Retrieval) Database .SR4 SIR (Scientific Information Retrieval) Database .SRB Corel ClipArt ScrapBook .SRC Sourcecode (various) .SRF Sun Raster Graphic File Siebel Repository File (compiled objects) .SRI Voice It Link Compressed Voice File [Free player] .SRM Super Nintendo ROM Saved File (saved game) .SRP QuickLink Script .SRPM Redhat Linux RPM Source File .SRT BSplayer Subtitle File SDR99 Speech Recognition Task Speech Recogniser Transcript Omron CX-Supervisor (Factory Automation) .SS Splash Bitmap Graphic DrScheme Programming Environment File XShipWars Sound Scheme File Ribbons File (protein analysis) Oberlin DRAGN Graph Algorithm .SSA Subtitles .SSC HP Library and Tape Tools Script SwordSearcher File Scrippy File (E-mail stationary) .SSD SAS Database Snagit Studio Design File .SSF Enable Spreadsheet File .SSH2 SSH Secure Shell Client .SSI Installer/GD Software Setup Information SriSun [XnView] .SSK SwordSearcher File SmartSketch File (Use Hijaak to convert - SmartSketch became FutureSplash which became Macromedia's Flash) .SSL Corel Flowchart Symbol Library File .SSM RealPlay Standard Streming Metafile .SSP SAS Transport Data Axialis Screensaver [XnView] .SSS Sudden Strike Saved Game .SST Certificate Store Sea Surface Temperature File .SSX ScreenShare Data File VersaPro Smart Store Document .SSY ScreenShare Compressed Data File (compressed .SSX file) .ST SMALLTALK Program File Scream Tracker Instrument Library Atari ST Disk Image NeoPaint Stamp File .ST4 SBIG CCD Camera ST-4 [XnView] .ST5 SBIG CCD Camera ST-5 [XnView] .ST6 SBIG CCD Camera ST-6 [XnView] .ST7 SBIG CCD Camera ST-7 [XnView] .ST8 SBIG CCD Camera ST-8 [XnView] .STA Eudora File Statistica Spreadsheet Spinmaker Plus Stack Reflection Saved State Brazilian MSX Emulator - BrMSX Saved State .STB Genus Stub Library .STD Prosa State Transition Diagram Graphic SureThing CD Labeler Document File (Labels CDs, DVDs, Jewel Cases, etc.) LocoScript Standard Script File .STEALTH Likely a text file (e.g., README.STEALTH) .STEP AP203 Step File .STF ShrinkToFit Compressed Archive File Setup Information Structured File .STG PageKeeper Storage File MS ActiveSync (backup of data on mobile device) Statistica Graphics File Visual Pinball High Scores (and other data: vpreg.stg) .STK Personal Stock Monitor File .STL Certificate Trust List Macromedia Fireworks Style Library CAD Software Solid Modeling/Prototyping File .STM Sound File Prosa State Transition Diagram Model Scream Tracker v2 Module SHTML File (HTML File Containing Server Side Directives) SDR99 Speech Recognition Task Time Segment Time Marked File PhotoStudio Stamp [XnView] .STML Sealed HTML File [Unsealer] .STN STiNG File (Iterated Systems resolution-on-demand images) .STO Genus Pascal Stub OBJ File Infinity Engine Game Storage File .STP PageKeeper Packed Storage File DART Pro 98 System Settings AP203 Step File .STR dBase Structure List DataPerfect Structure File Fifa 2002 Music File Sceensaver Statistica Report File Stream File (Playstation Discs) Music File .STS MS C Project Status Info Scream Tracker Song Nimbus 7 SAMS Data File (status data) .STT Automap Template SureThing CD Labeler User Template File .STU Tarantella Enterprise 3 3270 Emulator Style File xyALGEBRA File .STV sofTV.Author File (Streaming Video Web Authoring) .STW SmartTerm Data File Statistica Workbook File Neopaint Stamp [XnView] .STX Simply Tax Form EditPlus Syntax File SmarText E-book SBIG CCD Camera ST-X [XnView] .STY Style Sheet (various) MS Interactive Music Control LaTeX2e Style .SUB CloneCd Related File Divx Subtitles SubmitWolf File (search engine submission program) .SUD Super Project Analyzer Data .SUI Simple User Interface Toolkit Library .SUITE Winstyles Theme (customizes the Windows Desktop) .SUL GFA Ray-Trace [XnView] .SUM Summary (various) .SUMP Easy Palette Gallery or Library .SUN Sun Raster Graphic File [XnView] .SUNIFF Sun TAAC File [XnView] .SUP WordPerfect Supplemental Dictionary Super Porject Analyzer Project .SUR Surveyor Document .SV$ AutoCAD Autosave File .SV1 Transport Tycoon Saved Game [TT Info] .SV4 RollerCoaster Tycoon Saved Game .SVB Statistica Macro File .SVC Statistica Macro File .SVD Word Backup File [Buy Office XP at Shop.Microsoft] .SVF WinSFV (Checks for damaged .rar files) .SVG Word Backup File [Buy Office XP at Shop.Microsoft] Scalable Vector Graphics File Lode Runner Saved Game .SVI Mimio Ink Files Red Faction Game File .SVL Scramdisk VoLume (Win98 freeware also opened by DriveCrypt) .SVO Statistica Macro File Transport Tycoon Custom World [TT Info] .SVP WISCO Survey Power SwiftView Command File .SVQ Roland Keyboard Midi Sequence InfoBind File Format (encryption format used in Fuji SmartMedia cards to prevent copying) .SVS Word Backup File [Buy Office XP at Shop.Microsoft] DART Pro 98 Spectral View Settings .SVX Interchange File Format, 8SVX/16SV Amiga 8SVX Sound Statistica Macro File .SW Audio File Raw Signed Word (16-bit) Data SmartWare Spreadsheet (requires login) EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E] .SWA Shockwave Audio File SATLOC FreeTrac (GPS Guidance and mapping) .SWB PageMaker 7.0 ColorSync Component Super Win-EBook 98 File Sametime Whiteboard File .SWD Storybook File (educational) Sabiston Textbook .SWF Macromedia Flash Format [Alternate] [IrfanView] Microsoft Sidewinder (Force Feedback Joysticks) Profile Activator .SWFS Dreamweaver File .SWG Swag Reader Packet .SWI Swish Data File (Swish makes Flash files) .SWK Swapkeys Keyboard File .SWL Macromedia Flash Format [Alternate] .SWP Sprint Backup File Swap File Spider Writer Project File .SWS S-PLUS Workspace Swift Generator Instruction File SmartWidgets File Screen Writer Studio File VHDL Simili Sonata Project File Science Workshop File .SWS0 Screen Writer Studio File Backup .SWT VB Setup Wizard Template File Macromedia Authoring Flash File Swift Generator Template File Space Watch Pro Data File .SXC OpenOffice.org Spreadsheet File .SXD OpenOffice.org Draw File .SXF Secure eXchange Format File (Phocis Licensing Client) .SXG OpenOffice.org Writer 6.0 Master Document .SXI OpenOffice.org Presentation File .SXLS Sealed Excel File [Unsealer] .SXM OpenOffice.org Math File .SXP OpenOffice.org Presentation File .SXW OpenOffice.org Writer 6.0 Text File Staroffice Word Document .SY# Darn! Backup Files .SY1 Ami Pro Smartpix Symbol Library .SY3 Harvard Symbol File (Harvard Graphics taken over by Serif) .SYD Sysedit Backup File .SYL SYLK Spreadsheet Format .SYM Symbol Table (various) Borland C++ Precompiled Headers .SYN Synonym File TextPad Syntax Definition SDSC Image Tool File Breakneck / N.I.C.E.2 Archive [Dragon UnPACKer] Excessive Speed Archive [Dragon UnPACKer] Synthetic Universe [XnView] .SYNU Synthetic Universe [XnView] .SYS System Configuration System Device Driver .SYW Harvard Symbol Graphic (Harvard Graphics taken over by Serif) Yamaha SY-series Wave Files .SYX SysEx MIDI File .SZ0 Binary File Format (used when uploading via a COM port) .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .T Tads Source File Turing Programming Language File TAR Tape Archive Without Compression .T_1 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library) .T?? Ingres Table/Index File (?? = Hex 00 to FF) RAR Compressed File (?? can be 01 to 99 after .S99) .T1 Male MRI [XnView] EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E] .T2 Male MRI [XnView] .T2K Teach2000 Document .T2T Sonata CAD Modelling File .T64 C64S Emulator Program .T98 Kiplinger Tax Cut File (1998 Tax Year) .T99 Kiplinger Tax Cut File (1999 Tax Year) (Note: Kiplinger Tax Cut State Return Files are of the form .T?? where ?? is the two-character state designation.) .TAAC Sun TAAC File [XnView] .TAB Guitar Tablature File [On-line Guitar Archive] MapInfo Table Diabetes Mentor File .TAF Birdstep Technologies RDM Database (may be embedded in other software) .TAG Dataflex Query Tag Name .TARGA Truevision Targa Bitmap [XnView] .TAH Turbo Assembler Help File .TAI INMOS Transputer Development System Occam Analyse Info .TAL Adobe TypeAlign Text Illustration File Typed Assembly Language File .TAM Tame Program Settings .TAO IsoBuster File .TAR Compressed Archive File .TAX Turbotax File .TAZ Compressed File (short for .tar.z) .TB1 Turbo C Font .TB2 Turbo C Font .TBB The Bat! E-mail Hives .TBC IronCAD Tool Bar Customization Inovate Tool Bar Customization .TBF Imavox TurboFax Faxs Trellian Button Factory File .TBG TeamBG File (modify Infinity Engine games) .TBI The Bat! Hive Index .TBK Memo Backup (database programs) Asymetrix Toolbook The Bat! Backup Hives .TBL Adobe Pagemaker Import Mapping Table OS/2 Table of Values .TBP TAS Books Accounts .TBR SoftQuad XMetaL Toolbar/Menu Configuration .TBX Project Scheduler Table .TC Borland Configurations File .TCF Theme Park World Game File .TCH Borland Help File .TCI INMOS Transputer Development System Occam Configuration Info .TCL TCL/TK Language Script TextPad Clip Library SLIDE: Scene Language for Interactive Dynamic Environments File .TCM INMOS Transputer Development System Occam Comment Text File .TCT Championship Manager Game File TurboCAD Template .TCW TurboCAD Drawing .TCX TurboCAD Drawing as Text .TD Turbo Debugger Configuration File .TD2 Turbo Debugger Configuration File .TD4 RollerCoaster Tycoon Track Design ThumbsPlus Version 4.x+ Graphics Database .TDA Palm Date Book File .TDB Thumbs Plus Database .TDF Trace Definition File TheDraw Font Typeface Definition File (for fonts) .TDH Turbo Debugger Help File .TDI Explore (TDI) & Maya [XnView] .TDIM Digital F/X [XnView] .TDK Turbo Debugger Keyboard Record .TDO Compressed File .TDP Serif DrawPlus Thumbnail .TDS Turbo Debugger Symbol Table .TDT Daylight Fingerprint Data File ASCII Data File in CSV Format (various) .TDW Turbo Debugger Configuration File .TDY TODAY or BuildPro Application File .TE Textease File .TE2 Conquest of the New World .TEA Tea Template Source File .TED Tribes 2 Game File .TEE TeeChart Office Graphic .TEF Relisys Tefax Fax TablEdit (creating, editing, printing and listening to tablature) .TEL Telnet Host File .TEM Icon Author Template Turbo Editor Macro Language Badge Designer 2000 File .TEMP Audiogalaxy Downloading Music File (file renamed when download complete) .TER TerraGen Landscape File Daylon Leveller Heightfield Data .TET Textease Template .TEX TeX LaTeX File Mackichan Scientific Notebook File PaintShop Pro Texture [XnView] Texture File (various) [usually a renamed .BMP file and may be in special directory] Idealist Datasheet Concordance Full Text Database File .TEXT ASCII Text File (use any editor to open) .TF Turbo Profiler Configuration File .TFA Turbo Profiler Area File .TFC Tobi's Floppy Cataloguer Catalog .TFH Turbo Profiler Help File .TFM Tagged Font Metric TeX Font Metric File Toplevel Form File .TFR Star Wars - Tie Fighter Game-Pilot File IBM Client Access File Transfer 4D Database Windows Formula Document .TFS Turbo Profiler Statistic .TFW Digital Raster Graphic World .TFX Traffix Traffic Analysis Software .TG1 On Target Project File .TG4 CCITT Group 4 Fax [XnView] .TGA Truevision Targa Graphic [XnView] [IrfanView] (Used by some game programs -- sometimes called texture files) .TGD Nimbus 7 SAMS Data File (gridded temperature data) .TGH Tiliagraph File (Stratigraphic Diagram Software) .TGH TrueGas Host File .TGM Nem's Mega 3D Terrain Generator .TGW Terragen Atmosphere File .TGZ UNIX Tar File Zipped (short for .tar.gz) .THB KinuPix Skin [XnView] .THD Thread .THEME Microsoft Plus! Theme File .THM MS Clipart Gallery Database Serif DrawPlus Theme .THN Graphics Workshop for Windows Thumbnail .THP TurboTax-related File LiveMath Plug-in .THR PROGNOSIS Threshold Document File .THS WordPerfect Thesaurus .THU Command and Conquer Renegade File .TIB Acronis True Image (hard drive partition manager) .TIC Lotto Pro 2002 Ticket Arcinfo Coordinates File (GIS-related file) .TIE X-wing Alliance Game File .TIF Tagged Image Format File [XnView] [IrfanView] [SwiftView] Digital Raster Graphic Image .TIFF Tagged Image Format File [XnView] [IrfanView] [SwiftView] .TIG Tiger Government Map File .TIK Script File for Game Textures (ASCII file) .TIL Togai InfraLogic Fuzzy-C Knowledge Base Buttonz & Tilez Texture [XnView] Tilia File .TIM Playstation Game Texture Image [XnView] The Incredible Machine Level File TIFF Image (rev 6) [XnView] .TIP Startup Tip File (various) .TIS MahJongg Tile Set .TIX Hybrid Graphics File (both vector and raster data) ASA for UNIX Terminfo Extension File Tix Widgets DivX File .TK TK Solver File .TK2 Take Two/Easy CD Creator Backup .TKB TicketBench Data File (design/print tickets) .TKM Panasonic SD Voice Editor File .TJF VAXTPU Backup File (VAXTPU is default OpenVMS editor) .TKN Liberty BASIC Application Distribution File .TKT TK Solver File .TKW TK Solver File .TLB Remote Automation Truelib Files OLE Type Library Visual C++ Type Library VAX Text Library Bubble Chamber Reference Table .TLC Swat Compiled Tood Command Language Source .TLD Trellix File .TLE NASA Two-Line Element Set .TLF Turnpike SCORE Link File Avant! Memory Compiler Memory Models Format File Gear Track List File (CD burning) (Used to be .CUE; just rename .CUE to .TLF) Short Message Service File (GSM phone messaging) .TLG Trellix WebGem .TLK Hand of Fate Archive [Dragon UnPACKer] Lands of Lore Archive [Dragon UnPACKer] .TLP MS Project Timeline File .TLS Timeless Time & Expense .TLT Trellix Web Design File TList Data File .TLX Telex Trellix Data File .TMA DCI TradeManager Catalog Archive .TMB Timbuktu Pro Connection Document (remote control software) .TMC DCI TradeManager Catalog Archive .TMF WordPerfect Tagged Font Metric File .TMG The Marketing Game File .TMO Zortech C++ Global Optimizer Output File .TMP Temporary File/Folder .TMQ TestMaster File .TMR Simpsons Cartoon Studio File .TMS Telemate Script .TN1 Tiny [XnView] .TN2 Tiny [XnView] .TN3 Tiny [XnView] .TNC SuperJPG ThumbNail Cache File .TNEF Transport Neutral Encapsulation Format File .TNF Transport Neutral Encapsulation Format File .TNK OMEGA Tank File (Origin Systems game no longer marketed) [Info] Nimbus 7 SAMS Data File (pre-launch calibration data) TrunkTrac Scanner Info .TNL Thumbnail [XnView] .TNY Tiny [XnView] .TOC Eudora Table Of Contents .TOL Kodak Photoenhancer .TOP INMOS Transputer Development System Occam Top Level File .TOS Atari Executable (TOS = The Operating System - Sometimes an archive) .TOT Telelogic Option Templates .TP Turbo Pascal Configuration File Turbo Profiler Session-state File EROSION 3D Relief Parameters [Format (pdf)] .TP3 Harvard Template (Harvard Graphics taken over by Serif) .TP4 RollerCoaster Tycoon Track Design Screenshot .TPB HiJaak PCL Soft Font File Backup .TPF HiJaak PCL Soft Font File .TPH Turbo Pascal Help File .TPI Visual Test Shell File (tests BACnet function of building automation equipment) [Also called EPICS (electronic protocol implementation conformance statement)] .TPJ TestStand Project .TPL Turbo Pascal Resident Units Harvard Template (Harvard Graphics taken over by Serif) fKey Template Designer Template File NoteTab Template CakeWalk Audio Template File DataCAD Template File Canvas 7 Template Timeslips TSImport Template Adobe Photoshop Tool Preset File MS Access Workflow Designer TextBridge Template .TPM TextPad Macro .TPP Turbo Pascal Protected Mode Units Teleport Pro Project (Web spider) TypePlus File .TPR GROMACS 3.0 Molecular Dynamics Simulator File Together Project Definition TMPEG Enc Video Conversion Project File .TPS Clarion for Windows Data File .TPU Turbo Pascal Unit VAXTPU Command File (VAXTPU is default OpenVMS editor) .TPW Turbo Pascal Unit Turbo Profiler Session-state File .TPZ Compressed File (short for .tar.gz) .TR Turbo Debugger Session-state Settings Manual Page Input to UNIX troff -man Command .TR2 Turbo Debugger Session-state Settings .TR5 Tree Professional File .TRC Power CTrace Debug Support File Oracle SQL*Net Trace Debug File True BASIC Compiled Code .TRE PC Tools Directory Tree VisiRex SDK Tree Function File Kith and Kin Export File (document/store family trees) TreeAge Decision Tree File Wing Commander Series Movie/Game File EA SPORTS File .TRF DocuMagix File .TRG Symantec LiveUpdate File .TRI Trigram File .TRK Kermit Script File Mixman Studio Track Train Dispatcher Railroad Centgralized Traffic Control Simulation .TRM Terminal Settings (various) TRiM High-compression Lossless 8 to 32 bit Truecolor Image File .TRN Quattro Translation Adobe Pagemaker File STN Express Transcript Text File (search science databases through STN®) MS SQL Server Transaction Backup TextBridge Training Data MKS Source Integrity Project Log .TRO Anti-Trojan File .TRP Tripmaker File .TRS Micrografx Executable File EROSION 3D Temporal Event File [Format (pdf)] .TRT Team Sports Scheduling System Report Template .TRU True BASIC Source Code TruSys System Comparison File .TRW Turbo Debugger Session-state Settings .TRX Emerald PC Authorize Batch Transaction File .TS Tune Smithy File .TSC Top Secret Crypto File .TSCE TextShield Zip-compressed .RTF File (TextShield Compression Engine) .TSK Skins (Themes) for Pocket PC PDAs PhotoImpact Quick Command .TSL Borland TeamSource File .TSP Windows Telephony Service Provider .TSR INMOS Transputer Development System Occam Program Source .TSS Team Sports Scheduling System Project File .TST WordPerfect Printer Test File TextShield Template Test File .TSW TestStand Workspace .TSX Team Sports Scheduling System XML Project File .TT ThinkTank Outliner (old Apple program) .TTC TrueType Compressed Font .TTF TrueType Font .TTK Alchemy Catalyst Translation Toolkit (purchased from Corel) .TTL Tera Term Macro File .TTO IBM Client Access File Transfer Description .TTP Telelogic Tau Project Atari TOS Executable With Parameters (TOS-Takes-Parameters) .TTR TeeTree Office File .TTW Telelogic Tau Workspace .TTX Crystal Report Data Connection File .TUB PaintShop Pro Tube File [XnView] .TUD Thumbs Plus Viewer Graphics .TUO Thumbs Plus Viewer Graphics .TUT Tutorial .TV Paradox Table View Settings .TV1 WordPerfect Overflow File Above Doc 1 Insert Point (can be 1-9) .TV4 TValue File (Amortization and time-value-of-money calculations) .TVM TVMconv .TVO TeveoLive (video recording) .TVS VectorMAX Streaming Video .TVT RealPlayer .TVVI InterVideo WInDVR .TWC Tripwire Configuration File (intrusion detection) .TWD Simtech MindMapper Mind Map .TWE ThinkWave Educator Data File .TWF TabWorks File Georeferenced Information File .TWG ThatWaltGuy Web Server File .TWP Toplevel Computing Fine Words (DOS Word Processor) Tripwire Policy File (intrusion detection) .TWR Tripwire Report File (intrusion detection) .TWS TextPad Workspace File Tripwire Schedule File (intrusion detection) .TWW Tagwrite Template .TX8 DOS Text File .TXB Descent/D2 Encoded Briefing File .TXC Urban Chaos Game File .TXF Compressed File (short for .tar.f) .TXI TeX Support File .TXL Genesis3D Texture File .TXM DATAIR Pension Reporter Data File .TXT Text File (open in Notepad, WordPad, Word, or many other programs) .TXW Yamaha TX16W Wave Files [Linux Player] .TXX DataPerfect Text Storage .TYM PageMaker Time Stamp .TZ Compressed File (short for .tar.z) Ingres Time Zone File .TZB Compressed File (short for .tar.z.btoa) .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .U Unreal System File .U2 Telelogic Tau UML Model .U2E Unreal Game Translation .U2P Telelogic Tau UML Program Text File .U8 Raw Unsigned 8-Bit Audio Data .U96 EasyZip Temporary File .UAP User Agent Wireless Telephony Profile .UAX Unreal Audio File .UB Audio File Raw Unsigned Byte (8-bit) Data .UC2 Compressed File .UCF Xilinx Foundation User Constraint File .UCM Urban Chaos Game File .UCN Compressed Archive .UCS Universal Classification Standard Database File .UDB PINO 3-Server File Win2000 Uniqueness Database File (used in setup--provides answers that override defaults for unattended installs) .UDC Acrobat Spelling File .UDF MS Excel User Defined Function Photostyler Image Filter .UDL MS Data Link .UDS Sierra Generations Family File (program no longer supported) .UDW Raw Unsigned DoubleWord (32-bit) Data .UE2 Encrypted Archive .UFO Ulead Object File .UG Drawing File (various) .UHA UHARC Compressed Archive [Download Link] .UHS Universal Hint System File .UHTM Unreal Tournament File .UI User Interface Geoworks UI Compiler Espire Source .UIF WordPerfect Long Prompts .UIH Geoworks UI Compiler Espire Header .UIS WindowBlinds Skin (changes the look and feel of WindowsXP) .UL uLAW Audio File .ULD Procomm Uploaded Files .ULP Peugeot Diag 2000 File (vehicle diagnostic equipment) .ULS Internet Location Service .ULT UltraTracker Music Module .ULW ULAW - Sun/NeXT .UMB MemMaker Backup Archive .UMI CDDB Database and PC Music Library in PlayCenter .UMOD Unreal Self-extracting MOD File Unreal Tournament .UMX Unreal Music File .UNI MikMod (UniMod) Format Forcast Pro Data File .UNL Informix Binary File Created by UNLOAD Command .UNQ Fax View File (unverified) .UNR Unreal Map File .UNX Text File (usually UNIX) .UNV BusinessObjects/WebIntelligence Universe File (End-user query analysis/reporting tool) .UOL PhotoImpact Object Library File .UPD dBase Update File ProUpdater Per/Directory Options Setting File Universal Print Driver (cross-platform) Updated Program Data (various) .UPI ULead Photo Impact Program File [XnView] .UPJ ULead Project File .UPO dBase Compiled Update File .UPR FileMaker User Spelling Dictionary .UPX ULead Photo Express Saved Image File .URF Radar ViewPoint Universal Radar Format .URL Internet Location .URT Utah Raster Image [XnView] .USA Unreal Saved Game File .USB D-Link FM Radio Update USB Protocol Analyzer Trace (USBChief, USBAdvisor, USBTracer) .USE MKS Source Integrity File .USERPROFILE Symantec Live Update User Profile .USL LaserJet Landscape Font .USP PageMaker Printer Font LaserJet Portrait Font .USR User Database (various) .UTF AOL Updating Files (found in TOD [Tools on Demand] folder) .UTL Sound File .UTP BinPatch Patch Data File .UTX Unreal Texture File Unicode File (editor: UniPad) .UU Compressed Archive File (UUENCODE) [Tutorial] .UUD Uudecoded [Tutorial] .UUE Uuencoded [Tutorial] .UV2 Jane's Combat Simulations F-15 .UVR Ulead Cool 360 Viewer File .UVW geoManager/geoInterface User View .UW Audio File Raw Unsigned Word (16-bit) Data Unitype GlobalWriter File .UWF UltraTracker Wave File .UWL WordPerfect User Word List .UZE Ultimate Zip Compresion Agent .UZR UZR 3D Streamable 3D File Format .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .V Verilog File [Icarus] ReaGeniX Code Generator Consistency Check Support File Vivid Main Input File .V$$ Cheyenne/Inoculan AntiVirus Temporary File (reboot then delete - product no longer supported) .V2D VersaCAD File .V3D Vecta3D Model File .V64 Nintento 64® Emulation ROM Image (to run search for the Nintendo emulator program of your choice) .V8 Covox 8-bit Audio .VAD Mapper Variant File (program for taking an adjudication from a diplomacy judge) .VAG Sony PlayStation ADPCM Sound File .VAL Paradox Validity Checks dBase Values .VAM Velazquez Application Map .VAN VistaPro Animation .VAP Annotated Speech .VAR Icon Author Variable Sterling Software Data Dictionary File Sterling merged with Computer Associates. .VB VBScript File or Any VisualBasic Source .VBA VBase File .VBD ActiveX File .VBDOC VBdocman Configuration File .VBDT VBdocman Documentation Template .VBE VBScript Encoded Script File .VBG Visual Basic Group Project .VBK VisualCADD Backup File [Support Group] .VBL User Control Licensing File .VBN Norton Corporate Anti-Virus Quarantined File (Caution: file may be infected) .VBOXLM Aladdin Knowledge Systems Vbox File (software distribution) .VBP Visual Basic Project .VBR Remote Automation Registration Files .VBS VBScript Script File .VBW Visual Basic Project Workplace .VBX Visual Basic Extension .VBZ Wizard Launch File .VC VisiCalc Spreadsheet File .VCC VersaCheck Style .VCD VisualCADD Drawing File [Support Group] Virtual CD-ROM .VCE Natural MicroSystems Voice File .VCF vCard File Vevi Configuration File VP HybridCAD Native Format .VCH Interlock Public Computer Utility .VCI VP HybridCAD Native Format Visicontrol Compressed Image File .VCL Roxio Video CD Layout .VCM Visual Component File .VCPREF Symantec Live Advisor Preferences .VCR ATI Video Recorder File (may require ATI video card to play) .VCS MS Outlook vCalendar File [Buy Office XP at Shop.Microsoft] Video Clipstream Video File .VCT FoxPro Class Library MindVision Installer Vise (creates software installers) .VCW MS Visual C++ Workbench Information File .VCX FoxPro Class Library Spreadsheet File .VDA Targa Bitmap CAD File (federation of the automobile industry surfaces interface file) Video Display Adapter [XnView] .VDB Norton AntiVirus Corporate Edition Update File PC-cillin Quarantined File .VDF AntiVir Virus Definition File Vexira Anti-virus Virus Definition File .VDO VDOScript File .VDR ComputerEasy Draw File .VDT VersaPro Variable Declaration Table .VDX XML for Visio Drawing File Vector Graphic File VMM32.VDX: system driver that checks duplicate .VXD files and switches to protected mode Virtual Device Driver (also see .VXD) .VEE HP VEE Project File (visual environment for microelectric circuits) .VEM Voice E-mail File [Free Player] VeePro Embroidery Software Format .VENUE VenueBench Data File (design/print reserved seating tickets) .VEW Clipper Viewfile Lotus Approach View File Novel Groupwise E-mail View File .VF Video Factory File (unverified) .VFB VForm Builder .VFF Sun TAAC File [XnView] .VFM Voter Voting Form .VFN Voter Customer Voting Form .VFW Video for Windows .VGA VGA Screen Driver Targa Bitmap .VGD Generic CADD VGA Driver .VGM Video Game Music File Format [VGM Tools] .VGR Ventura Graphic .VGS Virtual Game Station Memory Card Save .VHA Macromedia Sitespring File .VHD VHDL Design File (text file used in design projects) .VHDL VHDL Design File (text file used in design projects) .VI LabView File Jovian Logic VI Graphics [XnView] .VIB Chemsoft® Export/Import MSDS Data .VIC Vicar Picture File [XnView] .VICAR Vicar Picture File [XnView] .VID Monitor Control File Media Player Video Screen Driver Quicktime Video MS-DOS 5 Shell Monitor File Vidcom 64 [XnView] .VIF Khoros Visualization Image File [XnView] Verity [XnView] .VIFF Khoros Visualization Image File [XnView] .VIK Viking Picture File .VIM VIM (Vi IMproved) Editor File .VIR Virus Infected File (renamed by Symantec Anti-Virus) .VIS Picture File .VIT LabView File VITec [XnView] .VIV VivoActive Player Video File .VIZ Division dVS/dVISE File .VJS Quicktime Music File .VL2 Tribes 2 Game (actually a ZIP file) .VLB Corel Ventura Library .VLD DataFlex Variable Length Data File .VLM Vellum CAD Drawing Ashlar-Vellum File .VLT Darn! Passwords! Vault File .VM Geoworks Virtual Memory File .VM1 Panasonic SD Voice Editor File .VMC Acrobat Virtual Memory File .VMDC VMware Virtual Disk File .VMDK VMware Virtual Disk File .VMF Ventura Font Characteristics FaxWorks Audio File .VMI Dreamcast Download Info File (short file with download info in it) .VMO Siemens Sl45 Mobile Phone Voice File Virtools Behavioral Server Composition (Web-based Protected Format) Cosmopolitan Virtual Makeover File .VMP Logos Library System 2.x Verse Map .VMR VBMaximizer File .VMS Sega Dreamcast VMU Save File (download file --requires .VMI file to point to it) Sound File [Linux Player] .VMX VMware Configuration File VectorMAX Streaming Video .VMX2 VectorMAX Streaming Video .VMX3 VectorMAX Streaming Video .VNA JVC JLIP (controls transfer images from digital camcorders) .VNC Virtual Network Computing .VNS Visual Net Server File (Web and XML Application Server) .VO Vivid Include File .VOB DVD Video Movie File (MPEG-2 program streams with additional info) Vue d'esprit [XnView] .VOC Quartet Audio File Creative Labs Sound Sound File [Linux Player] .VOF VZ Programmer Object Folder .VOID Halflife Map Voids File .VOL Tribes 2 Game File Earth Siege 2 Archive [Dragon UnPACKer] Giants: Citizen Kabuto Archive [Dragon UnPACKer] Tribes Archive [Dragon UnPACKer] Tribes Extreme Archive [Dragon UnPACKer] .VOX Vox Audio Dialogic ADPCM Talking Technology Inc. File Natural MicroSystmes Voice File .VP Ventura Publisher File Freespace Archive [Dragon UnPACKer] Freespace 2 Archive [Dragon UnPACKer] .VPA Excite Chat Gestures File .VPB Quantel VPB Graphic [XnView] .VPD VitaGraph File (medical testing related) Virpet Performance Descriptor .VPG VPGraphics File .VPP Virtual Pool Game (unverified) Red Faction/Summoner Package File .VPS Visual Pinball Script (external file loaded by .VPT file) .VPT Visual Pinball Table .VQE Yamaha Sound-VQ Locator File .VQF Yamaha Sound-VQ File .VQL Yamaha Sound-VQ Locator File .VRC SATLOC VRC (Variable Rate Control) .VRD VRScape Virtual Reality Model Loader .VRF Oracle 7 Configuration File .VRM Quattro Pro Overlay File .VRO Panasonic DVD Recorder File .VRP Watcom Project File .VRS WordPerfect Graphics Driver .VS Vivid Include File (Surface definition) .VS2 Roland-Bass Transfer File .VSD Visio Drawing .VSDISCO SOAP Dynamic Discovery File (MS SOAP & .NET apps) .VSL GetRight Download List File .VSM VisSim Simulation Model .VSP Virtusales ASP Compiler Project File SPX Sprite .VSS Visio Stencil Shapeware Visio Smartshapes File .VST Visio Template Truevision Vista Graphic [XnView] Targa Bitmap .VSW Visio Workspace File .VSX XML for Visio Stencil File .VSY VNC Spy (VNC host connection manager) .VT Linux VT100 File (use cat command to view) .VTD Custom Virtual Device Driver (.VXD) .VTM Cold Fusion Studio Query .VTX XML for Visio Template File .VUE dBase or Foxpro View 3D Studio Animation .VVF ViVerify Fingerprint .VVP Visual Voice Project File .VVR ViVerify Repair .VVT VersaPro Variable View Table .VW Volkswriter Text File Lightscape View .VWF CADvance Drawing File .VWL MGI VideoWave Video Wave Library (MGI to be bought by Roxio) .VWR PC Tools File Viewer .VWT MGI VideoWave Video Wave Thumbnail (MGI to be bought by Roxio) .VX EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E] .VXD Virtual Device Driver (also see .VDX) .VXML VoiceXML Source File .VXS Voice Xpress User Profile .VYD VyperHelp (Hypertext/help editor and converter) .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .W Applause Word Chart Progress Database File .W?? Divided Compressed File (?? = 01 to 99; used when installs needed to be on individual floppy disks) .W14 Genesis 2000 File .W30 Ventura Printer Font .W31 Windows 3.1 Startup File .W3D Black Belt Systems Ray Trace Control File .W40 Win95 Backup File .W44 dBase Temporary File .W64 Sonic Foundry Video Editor Wave64 File .WAB MS Outlook Address Book [Buy Office XP at Shop.Microsoft] .WAD Doom Game File [WAD Editor] [Dragon UnPACKer] (Also used for other games) Gunman Chronicle Archive [Dragon UnPACKer] Half Life Archive [Dragon UnPACKer] Heretic Archive [Dragon UnPACKer] Hexen Archive [Dragon UnPACKer] Quake Archive [Dragon UnPACKer] Theme Park World Archive [Dragon UnPACKer] Half-Life Texture File .WAF Mayim's WAF Compiler File (3D content for display in Walkabout plug-in) .WAG Urban Chaos Saved Game File .WAL WalMaster Showlist File Quake 2 Texture File [XnView] .WAR Archived Konqeror (KDE) HTML Page Java Web Archive .WAS Procomm Plus Script Source Code File .WAV Waveform Audio (PCM Wave) [IrfanView] SHARP MZ-series Emulator File .WAX Procomm Plus Compiled Script File Metafile (points to Windows Media Video [.WMA] file) .WB Dictionary Project Data File .WB1 QuattroPro for Windows .WB2 QuattroPro for Windows .WB3 QuattroPro for Windows .WBA Winace Zip File WindowBlinds Compressed Skin (changes the look and feel of WindowsXP) .WBC Webshots Picture Collection (library) .WBD Webshots Graphic Format .WBF Windows Batch File .WBI White Blotter, Inc. Advanced Code Editor .WBK Word Backup [Buy Office XP at Shop.Microsoft] WordPerfect Workbook .WBL Argo WebLoad II Upload File .WBM Webmin Module (Linux) WinBatch File Wireless Bitmap File (WML-related file) [Tutorial] Macromedia Fireworks File .WBMP Wireless Bitmap File (WML-related file) [Tutorial] Macromedia Fireworks File .WBR Crick WordBar File .WBS WebExpress Website File WinBot IRC Client Script Webshots Screensaver .WBT WinBatch Script Crick Wordbar Template .WBX Webigger File .WBZ WebShots File .WCD WordPerfect Macro Token List .WCFG WildTangent Configuration .WCI Catalog File Maintained by MS Indexing Service (CATALOG.WCI) .WCM Works File Transmission WordPerfect Macro .WCP WordPerfect Product Info .WCS Website Content Source .WCT WorldCast Project .WD2 WordExpress Document Info Select for Palm Organizer File .WDA RUMBA® OFFICE 95/N Configuration File .WDAT WildTangent Data File .WDB Works Database .WDF Workshare DeltaView DeltaFile (difference between two documents) .WDK WhizFolder Desktop File .WDL Windows XP Watchdog Log File 3D Game Studio Window Definition File (this one is free) 3D GameStudio World Definition Language File (this one you pay for) .WDR Star Wars - Tie Fighter Media .WEB Web Vector Graphic File Corel Xara Web Document XaraX Web Document .WEBPNP MS Support for Internet Printing .WF1 EViews Workfile (Econometric software) .WFA WinFax Pro Archive .WFB Turtle Beach WaveFront Bank .WFD Turtle Beach WaveFront Drum Set .WFL Ultimus Workflow Suite Workflow File .WFM dBase Form Designer Form Object .WFN Corel Symbols and Fonts .WFP Turtle Beach WaveFront Program .WFS Windows Installation Script .WFX Winfax Data File .WG1 Lotus 1-2-3 Worksheet .WG2 Lotus 1-2-3 Worksheet .WGF WaterGuide File (Decision Support System Water Reuse) .WGP Wild Board Games File .WGS WGS File Generator Web Segment File .WGT Worms Armageddon Teams File .WHT MS NetMeeting Old Whiteboard Document .WI Wavelet Image (different compression for JPEG) [Info resource] .WIC wIntegrate File J Wavelet Image Codec [XnView] .WID Ventura Width Table .WIF Weaving Information Format Wavelet Image File Wang Image File (fax related usually) .WIL Windows Interface Language Script WinImage File (Floppy and disk imager) .WIN dBase or Foxpro Window Wonderware InTouch Window Windows Backup File Normalised Extinction Corrected Differential Photometry with Tapered Ends .WINI WildTangent Configuration File .WINWARE WinWare Windows Applet (general purpose mini-applications) .WIP Windows Installer Project (opens with MS Visual Studio Installer) .WIRE Alias Wavefront Studio Wireframe .WIS wIntegrate Basic Script File .WIZ Wizard File [MS Publisher and Word] .WJP WildTangent Branded .JPG File .WK! Lotus Spreadsheet File .WK1 Lotus Spreadsheet File .WK3 Lotus Spreadsheet File .WK4 Lotus Spreadsheet File .WKB WordPerfect Document .WKB Workbook .WKE Lotus Educational Version Spreadsheet File .WKQ Quattro Spreadsheet .WKS Lotus Spreadsheet File XLISP Workspace MS Works Spreadsheet .WKZ Compressed Spreadsheet .WL WISCO Word Power (Vocabulary Activities) .WL1 File for Shareware Version of Wolfenstein 3D .WL6 File for Registered Version of Wolfenstein 3D .WLD REND386/AVRIL File .WLF Argo WebLoad I Upload File .WLG Dr. Watson Log .WLK Virtus Walkthrough Graphics .WLL Word Add-in [Buy Office XP at Shop.Microsoft] The Sims (Maxis) Wall Texture File .WLM CompW [XnView] .WLR VRML Page .WLS 602 pro PC SUITE Worksheet File .WLT eWallet File WaveL Wavelet Compressed Graphic Words of Worship Liturgy (song projection software) .WLV Web Link Validator File .WLZ WinImage File (Floppy and disk imager) .WM Windows Media A/V File .WMA Windows Media File (contains audio) .WMC WordPerfect Macro Wordmarc Text File Windows MathCad Startup File Backup .WMD Windows Media Download File (compatible with Windows Media Player 7 or later) .WMF Windows Metafile [IrfanView] .WML Wireless Markup Language File (HTML file for wireless devices) .WMN DART Pro 98 Playlist .WMP MS JScript Proxy Auto-Configuration Windows Media Player File .WMS Windows Media Skin File (compatible with Windows Media Player 7 or later) [Also see] .WMV Windows Media File (contains both video and audio) .WMX Audio Playlist Windows Media Player A/V Shortcut .WMZ Windows Media Compressed Skin File (compatible with Windows Media Player 7 or later) [Also see] .WN Write Now Text File .WNF Corel Outline Font .WNS PrintShop Newsletter .WO4 STABCAL (stability calculation for aqueous systems) File .WO7 STABCAL (stability calculation for aqueous systems) File .WOA Windows Swap File .WOC Windows OrgChart Organization .WOR MapInfo Workspace STABCAL (stability calculation for aqueous systems) File .WOS Words of Worship Output Settings (song projection software) .WOT WebEx Saved Meeting Movie .WOV Cakewalk Home Studio Picture Cache Clip File .WOW Grave Composer Music Module .WP WordPerfect Document File .WP4 WordPerfect Document File .WP5 WordPerfect Document File .WP6 WordPerfect Document File .WPA ACT! Word Processor File (.WPA and .WPD used for different versions) .WPD WordPerfect Screen Driver or Document 602 pro PC SUITE Document File ACT! Word Processor File (.WPA and .WPD used for different versions) .WPF WordPerfect Text File Enable Document WorldPort Fax .WPG WordPerfect/Drawperfect Graphics WildTangent Branded .PNG File .WPI WCPUID Plug-in (WCPUID confirms reliability of presentation data by CRC code) .WPJ W32Dasm Project File .WPK Keyboard WordPerfect Macros .WPL Words of Worship Playlist (song projection software) .WPM WordPerfect Macro .WPS Works Text Document .WPT WordPerfect Template 602 pro PC SUITE Template Document File .WPW PerfectWorks Document WordPerfect Document .WPX Adobe printer Information File (Usually found in C:\Windows) .WQ! Compressed Quattro Pro Spreadsheet .WQ1 Quattro Pro Spreadsheet .WQ2 Quattro Pro Spreadsheet .WR! Compressed Lotus Spreadsheet .WR1 Symphony Spreadsheet File .WRAP MediaForge Runtime Player .WRD Charisma Template .WRF WebEx Recording (MS Office add-in for meetings, etc.) .WRI Write Document (Use WordPad to open) .WRK Spreadsheet File Cakewalk Music Project File .WRL Plain Text VRML File [VRML] .WRML Plain Text VRML File [VRML] .WRP Amiga Compressed Archive File .WRS WordPerfect Windows Printer Driver .WRT IBM Writing Assistant File (DOS Application) .WRX Progress Database File .WRZ GNUZIP Compressed VRML File [VRML] .WS WordStar Document SmartWare Worksheet (requires login) Hummingbird Exceed File IBM iSeries Client Access File .WS1 WordStar for Windows 1 Document .WS2 WordStar for Windows 2 Document .WS3 WordStar for Windows 3 Document .WS4 WordStar for Windows 4 Document .WS5 WordStar for Windows 5 Document .WS6 WordStar for Windows 6 Document .WS7 WordStar for Windows 7 Document .WSA Animation Shop Workspace .WSAD WildTangent Actor Definition .WSBM WildTangent Material File .WSC Windows Script Component .WSD WordStar Data File EROSION 3D Watershed [Format (pdf)] .WSDL Web Services Description Language File (used by XML applications) .WSE Wise File .WSF Windows Script File [WinForce] .WSG Words of Worship Song (song projection software) .WSGO WildTangent Mesh and UVW Mapping File .WSH Windows Script Host Settings File .WSM SMS Installer Working File .WSMO WildTangent Motion File .WSP Chromeleon Wordspace Paint Shop Pro Workspace Fortran PowerStation Workspace [FORTRAN] Whisper 32 Password Manager .WSQ Wavelet-packet Scalar Quantization .WSR FirstStop WebSearch File .WST WordStar Text File .WSX WinMX Filesharing Program .WSZ WinAmp Skin Zip File .WT WildTangent Branded .X 3D Model .WT2 WordExpress Document Template .WTX ASCII Text File .WTXT WildTangent Branded .TXT File .WV WavPack Lossless Audio Compression .WVE Component of a DIVX Movie Conversion Psion Series 3a/3c/3mx Waveform Sound File [Player] .WVL Wavelet Compressed Bitmap .WVX Metafile (points to Windows Media Video [.WMV] file) .WWB WordPerfect Button Bar .WWK WordPerfect Keyboard Layout .WWL Word Add-in File .WWP Worms World Party Teams File .WWS AutoRoute User Information .WWV WildTangent Branded .WAV File .WXB EXP: The Scientific Word Processor .WXP EXP: The Scientific Word Processor Document .WXS Easy Cross File (cross stitch design) .WZB Librarian of OZ Sharp Book Viewer Add-on .WZD Sharp Organizer Program or Data File .WZG WZebra File .WZN WhizFolder Document .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .X LEX Program File Amapi 3D Modeling (prior to version 4) Stardent AVS X Image [XnView] Xview Object (create DirectX 3D scenes) .X01 Paradox Secondary Index (can be 01 to 09) .X16 Macromedia Program Extension (16-bit) .X32 Macromedia Program Extension (32-bit) .X3D Xara 3D Project File .X4M TeamLinks Mail File Data .X5 Rockwell Software Logix 5 File .X_T Parasolid CAD File .XA Extended Architecture File The Sims (Maxis) Extensive Audio File on PSX Disc Gear CD Suite File .XAB Xenis Mail Address Book .XAN XANIA® Browser xyALGEBRA File .XAR Xara X Vector Drawing Corel Xara Drawing (old) .XBF Emperor Battle for Dune [Format] .XBM X Bitmap Graphic [IrfanView] .XBS ETAK MapBase .XCF GIMP Image File [GIMP] [XnView] .XDF Workshare Synergy File Milnta APL Transfer Function (Dyalog APL File) .XDP UNIX File (unverified) .XDS OpenGL Performer Script .XDW Fujixerox DocuWorks File [Viewer (in Japanese)] [Viewer (in English)] Milnta APL Transfer Function (Dyalog APL Workspace) .XFD XML Form in XFDL Format [Viewer] .XFDF Acrobat Forms Document .XFM OmniForm XML Format .XFN Ventura Printer Font .XFR Symantec Norton Anti-Virus Corporate Version Failed Update .XFT Chiwriter 24 Pin Printer Font .XFX Fax File (various) .XG1 Techno Toys XG-909 MIDI Drum Machine File .XG9 Techno Toys XG-909 MIDI Drum Machine File .XGM Techno Toys XG-909 MIDI Drum Machine File .XGO LogMate for Windows File GeoConcept File .XGR MS Graph Edit XML Graph .XI Fast Tracker 2 Instrument ScreamTracker Instrument File .XIF Wang Image File Often a Fax Image (TIFF) File [IrfanView] ScanSoft Pagis XIF Extended Image Format (FAX) Xerox Image File .XIP Hotbar Image Compression Format .XJS WinExplorer Java Script .XJT Compressed GIMP Image with Properties of GIMP (.XJT is plain tar file) .XJTGZ Compressed GIMP Image with Properties of GIMP (gzip compressed tar file) .XJTZ2 Compressed GIMP Image with Properties of GIMP (bzip2 compressed tar file) .XL Old Amiga Movie Format .XLA Excel Add-in [Buy Office XP at Shop.Microsoft] Xlib Archive .XLB Excel File [Buy Office XP at Shop.Microsoft] .XLC Excel Chart [Buy Office XP at Shop.Microsoft] .XLD Excel Dialog [Buy Office XP at Shop.Microsoft] .XLG Xnetech Engraving Logo File .XLK Excel Backup [Buy Office XP at Shop.Microsoft] .XLL Excel Add-in (Dynamic Link Library) [Buy Office XP at Shop.Microsoft] .XLM Excel Macro [Buy Office XP at Shop.Microsoft] .XLR MS Works File .XLS Excel Worksheet [Buy Office XP at Shop.Microsoft] (also MS Works spreadsheet) DATAIR Data Import Specification Translation File .XLSHTML Excel HTML Document [Buy Office XP at Shop.Microsoft] .XLSMHTML Excel Archived HTML Document [Buy Office XP at Shop.Microsoft] .XLT Excel Template [Buy Office XP at Shop.Microsoft] Procomm Plus Translation Table Lotus Translation Table .XLTHTML Excel HTML Template [Buy Office XP at Shop.Microsoft] .XLV Excel VBA [Buy Office XP at Shop.Microsoft] .XLW Excel Workspace [Buy Office XP at Shop.Microsoft] .XM Sound File Fast Tracker 2 Extended Module .XMAP File That Controls How XML/XSL Gets Served (SITEMAP.XMAP Info) [ASCII Text File] .XMB X-Wing Mission Briefing File .XMF Milnta APL Transfer Function (Mainframe (SAM) File) .XMFG MediaForge Runtime Player .XMI Winamp Extended Midi File EverQuest File .XML Extensible Markup Language File [XML] .XMP Graphic File .XMS ViewCafé XML Markup Session .XMT_TXT Parasolid CAD File .XMV Milnta APL Transfer Function (Mainframe (SAM) Workspace) .XMX Character Set File AutoCAD External Message Compiled File .XNF Standard Network File Form .XNG OM2 911 Xchange Version 6 Document .XNK Exchange Shortcut .XOT Xnetech Job Output File .XP WinXP Theme (unverified) .XPI Mozilla Browser Archive (open with any ZIP utility) .XPL Music File WinExplorer Simple Script .XPM X Picsmap Graphic [IrfanView] .XPO Omega Research ProSuite .XPTHEME Winstyles Theme (customizes the Windows Desktop) .XPW Screen-Fillable Surfer Version of a Form Leading Market Technologies EXPO (professional investment charting/analysis) .XPY MarketBrowser (investment charting/analysis) .XQT SuperCalc Macro Sheet Waffle Executable File .XRF Cross Reference .XR1 Epic MegaGames Xargon File .XRF Crossreference File .XS Hummingbird Exceed File .XSD XML Schema File [XML] (read in text editor) .XSF Milnta APL Transfer Function (APL+Win File (former STSC)) .XSI Softimage XSI .XSL XML Stylesheet (eXtensible Style sheet Language for Transformations (XSLT)) [XML] (read in text editor) FileMaker Database Design Report Template .XSM LEXIS-NEXIS Tracker .XSN xyALGEBRA File .XSW Milnta APL Transfer Function (APL+Win Workspace (former STSC)) .XT* Crosstalk Related File .XTB LocoScript External Translation Table .XTG Quark Xpress Tags File .XTR RealArcade Compressed Data File .XTS CSPro File (combined IMPS and ISSA Census Processing System) Babya Desktop Shell System Software Extension .XUF Milnta APL Transfer Function (Unix (SAX) File) .XUL XML User Interface Language .XUW Milnta APL Transfer Function (Unix (SAX) Workspace) .XV Khoros Visualization Image File [XnView] .XVB WinExplorer VB Script .XVP Xview Package File (create DirectX 3D scenes) .XVS Xview Scene Package File (create DirectX 3D scenes) .XVU BOClean Database File .XWD X Windows Dump Crossdown Puzzle File .XWF Yamaha XG Works File .XWI X-Wing Mission File .XWK Crosstalk Keyboard Mapping .XWP Crosstalk Session XMLwriter XML Editor File Xerox Writer Text File .XX Xxencoded File Arcedit Temporary File .XXE Xxencoded File .XXX Singer Sewing Machine Professional SewWare File Embroidery Design File [possibly read with Melco Sizer Software] .XXY SPARC Executable Script File (e.g., /etc/hostname.xxy identifies network interface on local host) .XY XYWrite Text File .XY3 XYWrite Text File .XY4 XYWrite IV Document .XYP XYWrite III Plus Document .XYW XYWrite Windows 4.0 Document .XYZ XMol XYZ (MIME type chemical/x-xyz) .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .Y Amiga Yabba Compressed Archive File Yaac Grammar File Desktop Color Separation Specification Yellow Layer (usually an EPS file) .Y01 Paradox Secondary Index (can be 01 to 09) .Y64 Commandos 2 Game Mission .YAB YaBasic Source .YAL Arts & Letters Clipart .YBK Encarta Yearbook .YDK Yusuf Data Recovery (unverified) .YENC yEnc Encoded File (usually on usenet) .YLT TheWord & Bible Companion Young's Literal Translation Bible .YMAP Ygnius Computer Aided Thinking File .YMG Yahoo! Messenger File .YNC yEnc Encoded File (usually on usenet) .YPS Yahoo! Messenger File .YSP Bitmap Graphic (unconfirmed) .YUV Color Space Pixel Format .YZ Yac Compressed Archive File .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .Z Compressed Archive File .Z?? WinZip Split Compressed Archive (?? is a number from 01 upward) .Z# Frotz Z-Code Game .Z0 ZoneAlarm File .Z1 ZoneAlarm File .Z3 Infocom Game Module .Z64 Nintendo 64 Emulator .Z80 ZX Spectrum Emulator Z80 Snapshot [Format] .ZA? (? = A, B, C,...) Output of the UNIX SPLIT Utility (portions of a file) .ZAP FileWrangler Compressed File (only used in beta) MS Windows Software Installation Settings .ZARGO Poseidon UML CE/SE Diagram .ZAX Z-Axis 3-D Office Design Software .ZBA Compressed File Run Through UNIX COMPRESS and BTOA Utilities .ZBD MechWarrior 3 Snow Fields File Canon ZoomBrowser Database File Zebedee Encrypted File .ZBF Z-Buffer Radiance File .ZC Zipkey Configuration File .ZCH ZIG File (ZIG Game Construction Kit) .ZDB Wonder Word Data File .ZDF Z-Firm Document Folder .ZDG ZView Compressed Document .ZDP ZDNet Password Pro 32 (My Passwords.zdp) .ZEI ANNO 1602 Game .ZER Zerberus File .ZFS C++ Assembly Source Z-Firm File Stub Interstate '76 Archive [Dragon UnPACKer] Interstate '82 Archive [Dragon UnPACKer] .ZFSENDTOTARGET Compressed Folder SendTo Target File .ZGM ZenoGraphics File .ZHP Zipped SwiftView File .ZID Z-Firm ID .ZIG ZIG Game File (ZIG Game Construction Kit) .ZIM PagePath Technologies Compressed Mac File .ZIP Compressed Archive File .ZL? ZoneAlarm Mailsafe Renamed File ZoneAlarm Mailsafe will quarantine mail attachments and changes their extension. The conversions are: .ADE to .ZL0, .ADP to .ZL1 .BAS to .ZL2, .BAT to .ZL3, .CHM to .ZL4, .CMD to .ZL5, .COM to .ZL6, .CPL to .ZL7, .CRT to .ZL8, .EXE to .ZL9, .HLP to .ZLA, .HTA to .ZLB, .INF to .ZLC, .INS to .ZLD, .ISP to .ZLE, .JS to Z0, .JSE to .ZLF, .LNK to .ZLG, .MDB to .ZLH, .MDE to .ZLI, .MSC to .ZLJ, .MSI to .ZLK, .MSP to .ZLL, .MST to .ZLM, .PCD to .ZLN, .PIF to .ZLO, .REG to .ZLP, .SCR to .ZLQ, .SCT to .ZLR, .SHS to .ZLS, .URL/.ASP to .ZLT, .VB to .Z1, .VBE to .ZLU, .VBS to .ZLV, .WSC to .ZLW, .WSF to .ZLX, .WSH to .ZLY [Documentation] .ZLX Atlantis Ocean Mind Word Processing File .ZM? ZSNES Movie (? = number of the movie) .ZMF Zoner Draw File .ZMK Z-Up Maker Project File .ZMV ZSNES Movie File .ZOM Amiga Compressed Archive File .ZOO Compressed Archive File Zoo Tycoon Game File .ZPK Z-Firm Package .ZPL ZIG File (ZIG Game Construction Kit) .ZRS MS Hearts Game File .ZSK Embroidery Machine Stitch File (VeePro) [possibly read with Melco Sizer Software] .ZSR Form*Z Temporary Save File ($$$FMZ$$$.ZSR) .ZTE E-Tabs Reader File .ZVD ZyXEL Voice File .ZW Chinese .ZX KGB Shapshot [Format] .ZX82 Speculator '97 Shapshot [Format] .ZXS ZX32 Shapshot (unrelated to ZXS tape format) [Format] .ZZT ZZT Game Creation System [File Format] .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .? Multi-part Super Nintendo Game-console ROM Image (? = 1, 2, 3, etc.) [See ZNES or SNES9x] .0 Inno Setup Binary File .000 (000-999) Sequentially Numbered Backup Files (000-600) Paperport Scanned Image (.000 is desktop, .100-.600 images - number may include hex "a" to "f") (000-999) ARJ Multi-volume Compressed Archive (also see .A00) MS Doublespace Compressed Data File Geoworks Data File .00B PenSoft Payroll Backup File .001 (001-999) HJSplit File (file splitter for large files) Fax Data File (various) [XnView] Tagged Image Format File [IrfanView] [SwiftView] .01B PenSoft Payroll Backup File .075 Ventura Publisher 75dpi Screen Characters .085 Ventura Publisher 85dpi Screen Characters .091 Ventura Publisher 91dpi Screen Characters .096 Ventura Publisher 96dpi Screen Characters .0B PageMaker Printer Font LineDraw Characters .1 Inno Setup Binary File Roff/nroff/troff/groff Manual Source (UNIX) .10X Gemini Bitmap Printer Graphics File .113 Iomega Backup File .123 Lotus File .12M Lotus Smartmaster File .12U PageMaker Font File .15U PageMaker Printer Font .196 Computer Snooper Log File .1PE TurboTax Form File .1ST Information (e.g., README.1ST) .1TX 1toX File (Logipole) .22 Clipstream 20 Kb Stream .24B 24-bit Graphic File .286 Windows Standard Mode Driver .2BP Pocket PC Bitmap [XnView] .2D 2D VersaCAD Drawing File Amapi [XnView] .2GR Windows EGA/VGA Screen Grabber [EGA] [VGA] .3 Solaris Device Configuration Assistant Boot Diskette .301 Brooktrout Fax-Mail File [XnView] .303 Seq-303 Settings .320 Chromelion Demo Data File .323 H.323 Internet Telephony .340 Chromelion Demo Data File .386 Windows Enhanced Mode Driver or Swap File .3A3 STABCAL (stability calculation for aqueous systems) File .3A5 STABCAL (stability calculation for aqueous systems) File .3B3 STABCAL (stability calculation for aqueous systems) File .3B5 STABCAL (stability calculation for aqueous systems) File .3C3 STABCAL (stability calculation for aqueous systems) File .3C5 STABCAL (stability calculation for aqueous systems) File .3D VersaCAD 3D Drawing File .3DB 3D Mark Database (system testing - unverified) .3DM 3D Modeler File .3DMF QuickDraw 3D Metafile .3DML Rover 3D Modeling .3DP Serif 3D Plus .3DS 3D Studio Graphic .3DV Visual Component File .3DZ Easy 3D Creator Project File .3FX Corel Chart 3D Effect .3GR Windows SVGA/XVGA Screen Grabber [SVGA] .3IN MSN Setup Information .3O3 STABCAL (stability calculation for aqueous systems) File .3O5 STABCAL (stability calculation for aqueous systems) File .3T4 Binary to ASCII Conversion .3TA Triple-T Animation .3TP Triple-T Plug-in .3XE 3DLinX Entity (3D drawing tool) .411 Sony Mavica Data File [XnView] .44 Clipstream 32 Kb Stream .4A3 STABCAL (stability calculation for aqueous systems) File .4A5 STABCAL (stability calculation for aqueous systems) File .4B3 STABCAL (stability calculation for aqueous systems) File .4B5 STABCAL (stability calculation for aqueous systems) File .4BIT GoDot [XnView] .4BT GoDot [XnView] .4C$ 4Cast/2 Data .4C3 STABCAL (stability calculation for aqueous systems) File .4C5 STABCAL (stability calculation for aqueous systems) File .4DB 4D Database Structure File (data fork - .RSR for resource fork) .4DD 4D Database Data File (data fork - .4DR for resource fork) .4DF 4D Database Windows Search Document .4DL 4D Database Windows Log File .4DR 4D Database Data File (resource fork - .4DD for data fork) .4DS 4D Database Windows Data Segment .4DX 4D Database Plug-in (data fork - .RSR for resource fork) .4FI 4D Database Windows ASCII Map .4FR 4D Database Windows Apply Formula Document .4GE Informix 4GL Compiled Code .4GL Informix 4GL Source .4H3 STABCAL (stability calculation for aqueous systems) File .4LB 4D Database Windows Label .4LK 4D Database Windows Hot Link File .4O3 STABCAL (stability calculation for aqueous systems) File .4O5 STABCAL (stability calculation for aqueous systems) File .4QR 4D Database Windows Quick Report .4ST 4D Database Windows Saved Set .4SW 4DOS Swap File .4TH FORTH Program .4UG 4D Database Windows User/Groups Set .4V Quartet Music File .4VR 4D Database Windows Saved Variable .521 Murray State University Trojan Ring Configuration File .602 T602 Text File .608W Audiogalaxy Music File (unverified) .669 669 Tracker Module Unis Composer Music File .6AM Haltech ECU Fuel and Ignition Map .6CM Triton FastTracker 6-Channel Music .710 Korg Triton Music Workstation .73? TI-Graph Link File .73I TI Bitmap [XnView] .7Z 7-Zip Compressed File .8 A86 Assembler Program File .82B TI-82 Graph Link Backup .82G TI-82 Graph Link Group .82I TI Bitmap [XnView] .82P TI-82 Graph Link Program .83I TI Bitmap [XnView] .83P TI-Graph Link (TI-83 Program) .85I TI Bitmap [XnView] .86I TI Bitmap [XnView] .86P TI-86 Calculator File (mainly a game file) .8BA Adobe PhotoDeluxe Plugin (also ends in E, F, I, X, & Y) .8BF Filter Factory File [Added] [IrfanView] .8CM Triton FastTracker 8-Channel Music .8M PageMaker Math 8 Printer Font .8SVX Sound File [Linux Player] .8U PageMaker Roman 8 Printer Font .8XU TI-83 Program .83? TI-Graph Link File .89? TI-Graph Link File .89I TI Bitmap [XnView] .906 Calcomp Plotter File .917 Trend Antivirus File .92G TI-92 Graph Link Group .92I TI Bitmap [XnView] .92P TI-92 Graph Link Program .92T TI-92 Graph Link Text .999 Multipass Security File .9XK TI-92 Circuit Analysis File .??_ Files ending in "_" are often compressed install files of the same name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.) .### Temporary File .#24 Locoscript 24-pin Printer Data File .#IB Locoscript Dot Matrix Data File .#SC Locoscript Dot Matrix Data File .#ST Locoscript Dot Matrix Printer Definition File .$$$ Temporary File (various) .$00 DOS Pipe File (could also be .$01) .$$A OS/2 .$$F OS/2 Database .$$P OS/2 Notes .$$S OS/2 Spreadsheet .$D$ OS/2 Planner Data File .$DB dBase Temp File .$ED MS C/C++ Temporary Editor File .$LN Borland C++ TLink Response File .$VM MS Windows Virtual Manager Temp File .$#! Cryptext .(D) pcAnywhere Temporary File .@@@ Screen Files (shown during various installations) .@HA ImsiSoft E-mail Animator ._DD Norton Disk Doctor Recovered File ._DM Nuts n Bolts Disk Minder Recovered File (Helix Software now part of McAfee) ._MP InstallShield Temporary Installer File .?q? Squeeze .??? ANY three character audio file: May be a dictation file where the extension is the dictator's initials; playable by BCB Voice Systems software. This could likewise be a dictation file in TrueSpeech format. Use Windows Sound Recorder and/or Media Player to pay these back. .~ Temporary File .~AP Borland C++ AppExpert Project Database File .~DE Borland C++ Project Backup File .~DF Borland Delphi Backup File .~DP Borland Delphi Backup File .~DR ARKEY Drawing Backup File .~MN Norton Menu Backup .~NT NT Install Files (Used between first & second reboot) .~PA Borland Delphi Backup File .~PR Terramodel Project Backup .~SG TapCIS Message Index File .~$~ 1st Reader Temporary File