Filename Extensions


Generated 22 February 1999 from Filex database with 3240 items.
! # $ & ) 0 1 2 3 4 6 7 8 9 @ S Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z ~

!

.!!!Usually README file

#

.###Compressed volume file (DoubleSpace)
.###Temp file (QTIC)
.#24Printer data file for 24 pin matrix printer (LocoScript)
.#gfFont file (MetaFont)
.#ibPrinter data file (LocoScript)
.#scPrinter data file (LocoScript)
.#stStandard mode printer definitions (LocoScript)

$

.$$$Temporary file
.$$fDatabase (OS/2)
.$$pNotes (OS/2)
.$$sSpreadsheet (OS/2)
.$00Pipe file (DOS)
.$1ZX Spectrum file in HOBETA format
.$d$Data (OS/2 Planner)
.$dbTemporary file (dBASE IV)
.$edEditor temporary file (MS C)
.$lnTLink response file (Borland C++)
.$o1Pipe file (DOS)
.$vmVirtual manager temporary file (Windows 3.x)

&

.&&&Temporary file

)

.)2(LHA archiver temporary file (LHA)

0

.0Compressed harddisk data (DoubleSpace)
.000Common filename extension (GEOS)
.000Compressed harddisk data (DoubleSpace)
.001Fax (Hayes JT FAX) (many)
.07575x75 dpi display font (Ventura Publisher)
.08585x85 dpi display font (Ventura Publisher)
.09191x91 dpi display font (Ventura Publisher)
.09696x96 dpi display font (Ventura Publisher)
.0bPrinter font with lineDraw extended character set (PageMaker)

1

.1Unformatted manual page (Roff/nroff/troff/groff)
.10xBitmap graphics (Gemini 10x printer graphics file)
.123Data (Lotus123 97)
.12mSmartmaster file (Lotus123 97)
.15uPrinter font with PI font set (PageMaker)
.1stUsually README.1ST text

2

.24bBitmap graphics (24bit data)
.286Virtual device driver (Windows standard mode)
.2grVGA graphics driver (Windows Video grabber)

3

.301Fax (Super FAX 2000 - Fax-Mail 96))
.386Virtual device driver (Windows 386 enhanced mode)
.3d23D data (Atari Stereo CAD-3D 2.0)
.3dmQuickDraw 3D Metafile (QuickDraw)
.3dmfQuickDraw 3D Metafile (QuickDraw)
.3dsGraphics (Autodesk 3D Studio)
.3fx3D effects (CorelChart)
.3grVGA graphics driver (Windows Video grabber)
.3t4Binary file converter to ascii (Util3)

4

.4c$Datafile (4Cast/2)
.4geCompiled source code (Informix 4GL)
.4glInformix 4GL language source code file
.4mdMusical file
.4swSwap file (4DOS)
.4thForth language source code file (ForthCMP - LMI Forth)

6

.668Music (the mixing is always at 12048Hz)
.669Music (8 channels MOD) (669 Composer)
.6cmMusic (6 Channel Module) (Triton FastTracker)

7

.7575x75 dpi display font (Ventura Publisher)
.777Compressed file archiver (777)

8

.8Assembly language source code file (A86)
.8585x85 dpi display font (Ventura Publisher)
.8cmMusic (8 Channel Module) (Triton FastTracker)
.8mMath 8 extended character set printer font (PageMaker)
.8medMusic (Amiga OctaMed)
.8svxSound (Amiga 8-bit)
.8uRoman 8 extended character set printer font (PageMaker)

9

.9191x91 dpi display font (Ventura Publisher)
.9696x96 dpi display font (Ventura Publisher)

@

.@@@Screen files used in installation or instructions

S

.SAssembly language source code file.S for cpp (Unix)

Z

.ZCompressed file archive.Z (ascii) (compress)

_

.___Table (Adinf)

a

.aAda language source code file
.aAssembly source code (Macintosh)
.aObject library (unix)
.a11Graphics (AIIM)
.a8Alpha channel image data (24bit 3D animation) (Cubicomp PictureMaker)
.a86Assembly language source code file (A86)
.ab6Datafile (ABStat)
.ab8Datafile (ABStat)
.abcDocument (ABC FlowCharter 1.0)
.abcGeneral filename extension (ABC programming language)
.abcMusical notation language file (folk melodies)
.abfAdobe Binary Screen Font (Adobe Software)
.abkAutomatic backup (CorelDraw)
.abkAvigo Backup (Avigo)
.abmAlbum (Image PALS, PhotoPlus)
.abrAdobe Brush file (Adobe PhotoShop)
.absAbstracts (info file)
.absData file (Abscissa)
.ac$Spooled plot file (AutoCAD AutoSpool)
.acaProject (Project Manager Workbench)
.acadAutoCAD database file
.acbCompressed file archive (ACB)
.acbGraphics (ACMB)
.accProgram (DR-DOS - ViewMax) (GEM / resident)
.aceCompressed file archive (ACE, WinACE)
.acfAdobe Custom Filter (Adobe PhotoShop)
.acgiACGI Script (WWW)
.aclKeyboard accelerator (Corel Draw 6)
.acmAudio Compression Module add-on (Windows)
.acmGraphics file (ACMB format)
.acmbGraphics file (ACMB format)
.acoAdobe Color Palette
.acpAssistant preview file (Ms Office)
.acpCompressed file archive (ACB)
.acrBitmap graphics (ACR-NEMA medical image file)
.actActor source code file (Graphics cell) (Animation Works)
.actAssistant actor (MS Office)
.actColor table (Adobe Photoshop)
.actFoxdoc Action Diagrams (FoxPro)
.actPresentation (Action!)
.acvCompress and decompress audio data (OS/2 driver)
.adScreensaver (AfterDark)
.ad2ADPCM 2-bit compressed voice file (ZFAX)
.ad3ADPCM 3-bit compressed voice file (ZFAX)
.adaAda language source code file
.adbAda Package Body
.adbAppointment database (HP 100LX organizer)
.adcBitmap graphics (16 colors) (ScanStudio)
.adcDictionary (Lingvo)
.adcSound (TI/MIT ADC format)
.addAdapter Device Driver (OS/2)
.adexBitmap graphics (ADEX Corp. image file)
.adfAdministration configuration file
.adfAmiga Disk File
.adiGraphics (AutoCAD Device-Independent binary plotter image)
.adlMca adapter description library (QEMM)
.admMultiModule screensaver (AfterDark)
.adnAdd-in (Lotus 1-2-3)
.adpDynamite file (Astound)
.adpSetup file for fax modem interaction (FaxWorks)
.adpcmSound (Intel/DVI Adaptive Differential Pulse Code Modulation format)
.adrRandomizer screensaver (AfterDark)
.adsAda Package Specification
.adtDatafile for cardfile application (HP NewWave)
.adtDictionary (Lingvo)
.adtFax (AdTech)
.advGUS device driver (Gf166.com)
.adxDocument (Archetype Designer)
.adxIndex (Approach)
.aexAlpha linked executable file
.aexArmored extracted public key (PGP)
.aexpkArmored extracted public key (PGP)
.af2Flowchart (ABC FlowCharter 2.0)
.af3Flowchart (ABC FlowCharter 3.0)
.afcApple sound
.afiBitmap graphics (Truevision)
.aflFont file (for Allways) (Lotus 1-2-3)
.aflRubberFlex animation (AnimaFlex)
.afmAdobe Font Metrics (Type 1 font metrics for font installers)
.afmDatafile for cardfile application (HP NewWave)
.afpShape palette (ABC FlowCharter)
.aftTemplate (ABC FlowCharter 3.0)
.afwWorkspace (ABC FlowCharter 3.0)
.agnAgenda (Psion Series 3)
.aiVector graphics (Adobe Illustrator)
.aifAIFF sound (Apple Audio Interchange Format File)
.aifApplication information file (EPOC)
.aifSetup information (ADW Knowledge Ware)
.aifcAIFF-C sound (Apple Audio Interchange Format File with Compression)
.aiffAIFF sound (Apple Audio Interchange Format File)
.aimAOL Instant Message Launch (Netscape)
.aimAsm Text Mode Image File (The Ultimate Draw)
.ainCompressed file archive (Ain)
.aioAPL file transfer format file
.airAutomatic image registration
.aisGraphics (Array of Intensity Samples) (Xerox)
.aisImage sequence file (ACDSee)
.aixDatafile for cardfile application (HP NewWave)
.alSound (ALAW format)
.albGraphics album (JASC Image Commander)
.algActivity Log (ARCSOLO)
.aliasBitmap graphics (24bit RGB RLE) (Alias image file)
.allArts & Letters Library (Symbol and font files)
.allFilelist of all files (FRQView)
.allFormat file for working pages (Always)
.allGeneral printer information (WordPerfect for Win)
.aloAlmanac support file
.alphaBitmap graphics (raw alpha bytes)
.alsBitmap graphics (24bit RLE) (Alias - Vivid RayTracer)
.altMenu file (WordPerfect Library)
.amfMusic (Advanced Module Format)
.amgCompressed file archive (AMGC)
.amgSystem image file (Actor)
.amsAdobe Monitor Setup calibration file (Adobe PhotoShop)
.amsMusic (Velvert Studio MOD)
.ancList of pattern colors (Canon Computer Pattern Maker)
.aniAnimated cursor (Windows 95/NT)
.aniAnimation (Presidio - many)
.anmAnimation (Deluxe Paint Animator)
.annHelp annotations (Windows 3.x)
.ansAnimation (graphics or text)
.ansAscii text with ANSI character set (NewWave Write)
.antGame data (SimAnt)
.aolAmerica On-Line related file
.aosInstallable program (Nokia Communicator add-on software)
.apCompressed Amiga file archive (Whap)
.apDatafile (Datalex EntryPoint 90)
.apcPrinter driver characters (Lotus 1-2-3)
.apdAldus Printer Description (Aldus PageMaker)
.apdPrinter driver (Lotus 1-2-3)
.apfPrinter driver fonts (Lotus 1-2-3)
.apiAdobe Printer Ink file (Adobe PhotoShop)
.apiApplication Program Interface file (Adobe Acrobat)
.apiPassed parameter file (1st Reader)
.apiPrinter driver (Lotus 1-2-3)
.aplAPL work space
.aplSupport module (Manugraphics APL products)
.appAdd-in application file (Symphony)
.appApplication object file (dBASE Application Generator)
.appExecutable application file (DR-DOS - NeXTstep - Atari - EPOC)
.appGenerated application (FoxPro)
.aprData (Lotus Approach 97)
.aprEmployee performance review (Employee Appraiser)
.apxAppExpert database file (Borland C++ 4.5)
.arcCompressed file archive (ARC - PKARC - QUARK - SQUASH)
.arfAutomatic Response File
.arhArchivers definitions file (DN)
.ariAudio (Aristotle)
.ariCompressed file archive (ARI)
.arjCompressed file archive (Robert Jung's ARJ)
.arkARC archive (CP/M port of ARC file archiver)
.arkArchive (Managing your Money)
.arkCompressed file archive (QUARK)
.arrArrangement (Atari Cubase)
.arrBitmap graphics (Amber ARR image)
.artBitmap graphics (B&W) (many - First Publisher - Xara Studio)
.artGraphics (Another Ray Tracer - Vort)
.arxCompressed file archive (ARX)
.ascArmored encrypted file (Pretty Good Privacy)
.ascAscii text
.ascBitmap graphics B&W ASCII (GROB Graphic Object) (HP-48sx calculator)
.asdAutosave file (Word for Windows)
.asdPresentation (Astound)
.asdScreen driver (Lotus 1-2-3)
.asfDatafile (STATGRAPHICS)
.asfScreen font (Lotus 1-2-3)
.asfVideo (Advanced Streaming Format) (WWW)
.ashAssembly language header file (TASM 3.0)
.asiAssembler include file (Turbo C - Borland C++)
.asicASIC language source code file (ASIC)
.asmAssembly language source code file
.asoAssembler object (object orientated) file (Turbo Assembler)
.asoAstound Dynamite Objects
.aspActive Server Page (HTML file with Microsoft IIS script)
.aspAspect language script file (Procomm Plus)
.aspAssociation of Shareware Professionals note
.astAdobe Color Separtion table (Adobe PhotoShop)
.astAssistant file (Claris Works)
.astAstound multimedia file
.asxCheyenne Backup script
.asxVideo (Advanced Streaming Format) (WWW)
.at2Auto template (Aldus Persuasion 2.0)
.atkBitmap graphics (Andrew Toolkit Raster Object file)
.atmAdobe Type Manager related file
.attBitmap graphics (AT&T Group 4)
.auSound - basic 8bit ulaw compressed audio file (Sun Audio File format)
.autAutomation (IPIX)
.auxAuxiliary dictionary (ChiWriter)
.auxAuxillary references (TeX/LaTeX)
.avaPublication (Avagio)
.avbAntiViral Toolkit Pro Bases
.aviAudio Video Interleaved (movie) (Video for Windows)
.avrSound (Audio Visual Research file format)
.avsApplication Visualization System (animation)
.avsBitmap graphics (AVS X image file)
.avtAvatar-coding files (A3E)
.awText document (HP AdvanceWrite)
.awaAnimation Works Accelerated movie (Animation Works)
.awdDocument (FaxView - Microsoft Fax At Work)
.awkAWK language source code file
.awmAnimations Works Movie (Animation Works)
.awsData (STATGRAPHICS)
.awxCustom application wizard
.axLinker information for libraries (Modula-3)

b

.bBASIC language source code file
.bBase program (Modula-3)
.bBatch list (APPLAUSE)
.b&wBitmap graphics (Mono binary screen image) (1st Reader)
.b&wBitmap graphics (black and white) (atari - mac)
.b1nBitmap graphics (both mono and color binary screen image) (1st Reader)
.b30Printer font (JLaser - Cordata) (Ventura Publisher)
.b4Nuts and Bolts file (Helix)
.b64Encoded file archive (ascii) (base64 MIME)
.b8Bitmap graphics (one byte per pixel) plane two (PicLab)
.b8Red channel image data (24bit 3D animation) (Cubicomp PictureMaker)
.b_wBitmap graphics (black and white) (atari - mac)
.bacBackup
.badBad file (Oracle)
.bakBackup
.balMusic score (Ballade)
.barCompressed file archive (Unix BAR archive)
.barHorizontal bar menu object file (dBASE Application Generator)
.basBASIC language source code file (QuickBASIC - GW-BASIC)
.batBatch file (DOS)
.bbDatabase backup (Papyrus)
.bblBibliographic reference (TeX/BibTeX)
.bbmBrush (Deluxe Paint)
.bbnngBitmap graphics (BBN BitGraph terminal Display Pixel Data (DPD) sequence)
.bbpBezier surface file
.bbsBulletin Board System announce or text info
.bbsHudson-style messagebase (FTN software)
.bchBatch process object file (dBASE Application Generator)
.bchDatafile (Datalex EntryPoint 90)
.bckBackup (VMS/VAX)
.bcmComms script backup (MS Works)
.bcoOutline font description (Bitstream)
.bcpMakefile (Borland C++)
.bcsBrowse information (Windows95)
.bctBackup dictionary (Clarion)
.bcwWorkspace (Environment settings) (Borland C++ 4.5)
.bdbDatabase backup (MS Works)
.bdcDictionary (Lingvo)
.bdfBinary update file (BUpdate)
.bdfBitmap Distribution Format file (font - glyph) (Adobe - X11)
.bdfDatafile (Egret)
.bdrBorder (MS Publisher)
.bdtDictionary (Lingvo)
.bexBinary extracted public key (PGP)
.bexpkBinary extracted public key (PGP)
.bezBezier surface file
.bezOutline font description (Bitstream)
.bf2Bradford 2 font
.bfcBriefcase (Windows 95)
.bfmFont metrics (unix/Frame)
.bfxFax (BitFax)
.bgGame (Backgammon for Windows)
.bgaBitmap graphics (OS/2)
.bgiDevice driver (Borland Graphics Interface)
.bhxCompressed file ascii archive (BinHex)
.biBASIC source code include file (Visual Basic)
.bibBibliography (ascii)
.bibDatabase - not compatible with TeX format (Papyrus)
.bibLiterature database (TeX/BibTeX)
.bifBinary Information File (ASCII file describing image)
.bifBitmap graphics (b&w Binary Image Format) (Image Capture board)
.bifInitialization file (GroupWise)
.biffXLITE 3D file
.bigChinese text (old version)
.big5Chinese text (old version)
.bilSatellite image (8bit GIS tape format) (SPOT image)
.binBinary file
.binSGI Powerflip
.bioBIOS (OS/2)
.bitBitmap graphics (X11)
.bixCompressed file archive (BIX)
.bkFaxbook (JetFax)
.bk!Document backup (WordPerfect for Win)
.bk1Timed backup file for document window 1 (WordPerfect for Win)
.bk2Timed backup file for document window 2 (WordPerfect for Win)
.bk3Timed backup file for document window 3 (WordPerfect for Win)
.bk4Timed backup file for document window 4 (WordPerfect for Win)
.bk5Timed backup file for document window 5 (WordPerfect for Win)
.bk6Timed backup file for document window 6 (WordPerfect for Win)
.bk7Timed backup file for document window 7 (WordPerfect for Win)
.bk8Timed backup file for document window 8 (WordPerfect for Win)
.bk9Timed backup file for document window 9 (WordPerfect for Win)
.bkiBackup index (IBM BookManager)
.bkpBackup file (Write - TurboVidion DialogDesigner)
.bksBookself (IBM BookManager)
.bksWorksheet backup (MS Works)
.bkwMirror image of font set (FontEdit)
.bldBloadable picture (BASIC)
.blgBackup Log (ARCSOLO)
.blgBibTex log
.blkTemporary file (WordPerfect for Win)
.bmBitmap graphics (1bit text) (X Window BitMap)
.bm1Game data (Apogee BioMenace)
.bmfGraphics (Binary Material Format) (Corel)
.bmkBookmark file (Windows)
.bmpBitmap graphics (PC Paintbrush - many)
.bmtAmi Pro Button (Ami Pro)
.bnkAdlib instrument bank file
.bnrGraphics Banner (Banner - Poster)
.bobBitmap graphics (BOB Image file)
.booBook (IBM BookManager)
.booBootstrap (Kermit protocol binary file)
.booEncoded file archive (ascii) (Boo)
.bookBook (Adobe FrameMaker)
.bozCompressed file archive (bzip over zip)
.bpcChart (Business Plan Toolkit)
.bppBackup application (Clarion)
.bpsText document backup (MS Works)
.bptBitmap master file (CorelDraw)
.brData (Omnis7)
.brScript (Bridge)
.brdEagle Layout File
.brkFax (Brooktrout Fax-Mail)
.brkMailer REXX script (The Brake!)
.brl-cadBallistic Research Laboratory CAD
.brushBitmap graphics (Xerox Doodle Brush file)
.brxA file for browsing an index of multimedia options
.bs1Game data (Apogee Blake Stone)
.bs2Archive (BS2)
.bsaCompressed file archive (BSArc)
.bscBrowser information (MS Developer Studio)
.bscCompressed Apple II file archive (BINSCII)
.bscDatabase (Source Browser)
.bscPwbrmake object file (MS Fortran)
.bspMap (Quake)
.bstBiblioTex Style (BibTeX)
.bsyBusy flag (FTN soft)
.btlInmos bootable file
.btmBatch file (Batch To Memory) (4DOS - NDOS)
.btnButton file (Makeover)
.bubPhotobubble (IPIX)
.bufrBinary Universal Form for the Representation
.bufrMeteorological Data
.bugBugs and Problems
.bunBundle file (CakeWalk Audio)
.bupBackup
.butButton definitions (Buttons!)
.bv1Overflow file below insert point in Doc 1 (WordPerfect for Win)
.bv2Overflow file below insert point in Doc 2 (WordPerfect for Win)
.bv3Overflow file below insert point in Doc 3 (WordPerfect for Win)
.bv4Overflow file below insert point in Doc 4 (WordPerfect for Win)
.bv5Overflow file below insert point in Doc 5 (WordPerfect for Win)
.bv6Overflow file below insert point in Doc 6 (WordPerfect for Win)
.bv7Overflow file below insert point in Doc 7 (WordPerfect for Win)
.bv8Overflow file below insert point in Doc 8 (WordPerfect for Win)
.bv9Overflow file below insert point in Doc 9 (WordPerfect for Win)
.bwBitmap graphics (SGI image)
.bwbSpreadsheet application (Visual Baler)
.bwrBeware (buglist) (Kermit)
.byuBitmap graphics (Movie BYU format)
.bzCompressed file archive (bzip)
.bz2Compressed file archive (bzip2)

c

.cC language source code file
.cCompressed unix file archive (compact)
.c++C++ language source code file
.c--C-- language source code file (Sphinx C--)
.c00Print file (Ventura Publisher)
.c4Bitmap graphics (1bit) (JEDMICS CCITT4 format)
.c64Bitmap graphics (Commodore 64 image file)
.c86C language source code file (Computer Innovation C86)
.caInitial cache data for root domain servers (Telnet)
.ca0Packed and splitted file (Borland Installer)
.ca7Job file (Beta 44)
.cabCompressed Cabinet file (Microsoft)
.cacdBASE IV executable when caching on/off (see cachedb.bat)
.cadDocument (Drafix Windows CAD)
.calBitmap graphics B&W (Computer-aided Acquisition and Logistics Support)
.calCalendar file (Windows 3.x)
.calSpreadsheet (SuperCalc)
.calsBitmap graphics (Computer Aided Acquisition and Logistics Support)
.camGraphics (Casio QV Digital Camera)
.canFax (Navigator Fax)
.capCaption (Ventura Publisher)
.capCompressed music file
.capSession capture file (ProComm - Telix)
.casC + ASM language source (Turbo C)
.catCatalog (CP Backup - dBASE IV)
.catIntelliCharge categorization file (Quicken)
.catLogical package (Rational Rose)
.cbMicrosoft clean boot file
.cbcFuzzy logic system (CubiCalc)
.cblCobol language source code file
.cbmCompiled bitmap graphics (XLib)
.cbsButton bar configuration file (MasterWord)
.cbtComputer Based Training (many)
.ccC++ language source code file (gcc)
.ccCC language source code file (cc)
.ccaData (cc:Mail)
.ccadData (ClarisCAD)
.ccbAnimated Button configuration (Visual Basic)
.cccBitmap graphics (native format) (Curtain Call)
.ccfCommunications configuration file (Symphony)
.ccfConfiguration file (OS/2 Multimedia Viewer)
.cchChart (CorelChart)
.cciCCITT Group 3 and Group 4 Encoding
.ccittCCITT Group 3 and Group 4 Encoding
.cclCommunication Command Language file (Intalk)
.ccmMailbox (Lotus CC:Mail)
.ccoBtx Graphics file (XBTX)
.ccoData (CyberChat)
.ccrfBitmap graphics (Calcomp Raster File) (B&W or 1bit CMYK for printers)
.cctShockwave cast (Macromedia Director)
.cdCD description (DN)
.cdaCD audio track
.cdbCard database (CardScan)
.cdbMain database (Turbo C Utilities)
.cdfChannel Definition Format (Microsoft)
.cdfCommon Data Format (multi-dimensional data sets)
.cdfCyberspace Description Format
.cdfGraphics (Unidata netCDF)
.cdiCompact Disk Interactive (Phillips CD-I IFF file)
.cdkDocument (Atari Calamus)
.cdlCAD language file (CADKey)
.cdmDisk Drivers NPA (Novell NetWare)
.cdmMusic format (compressed)
.cdrVector graphics (CorelDraw format)
.cdtTemplate (CorelDraw)
.cdxCompound index (FoxPro)
.cdxCompressed drawing (Corel Draw)
.ceComputer Eyes (Digital Vision IFF bitmap)
.cefWorkbench application (CA Clipper)
.cegBitmap graphics (Tempra Show - Edsun Continuous Edge Graphics)
.celAnimation (Autodesk Animator - 3D Studio)
.celBitmap graphics (15/32bit) (Lumena CEL file) (Time Arts software)
.celCIMFast Event Language file
.cerCompilation error messages (Lahey Fortran)
.cerSecurity certificate
.cfConfiguration (imake)
.cfbComptons Multimedia file
.cfbInmos binary configuration file
.cfgConfiguration
.cflChart (CorelFLOW)
.cfmTemplate (Cold Fusion)
.cfnFont data (Atari Calamus)
.cfoC Form Object file (Turbo C Utilities)
.cfpFax (The Complete Fax Portable)
.cfrCFR Guidance (NRC Inspection Manual)
.cfsInmos configuration file
.cftCFast graphics file (Disney Animation Studio)
.cgaCGA display font (Ventura Publisher)
.cgiCommon Gateway Interface script (WWW)
.cglError log (CodeGuard)
.cgmVector graphics (Computer Graphics Metafile format)
.chConfiguration file (OS/2)
.chHeader file (CA Clipper)
.ch3Chart (Harvard Graphics 3.0)
.ch4Presentation (Charisma 4.0)
.chaChat (IRC data)
.chatChat (IRC data)
.chdFont descriptor (FontChameleon)
.chiDocument (ChiWriter)
.chkRecovered data (ChkDsk, ScanDisk)
.chkTemporary file (WordPerfect for Win)
.chlConfiguration History Log
.chmCompiled HTML file
.chnData (Ethnograph 3)
.chpChapter file (Ventura Publisher)
.chrCharacter set (Turbo C - Turbo Pascal)
.chtChart (Harvard Graphics 2.0 - SoftCraft Presenter)
.chtInterface file for ChartMaster (dBASE)
.chzCompressed file archive (CHARC)
.cifCD Image File (Easy CD Creator)
.cifChapter information (Ventura Publisher)
.cifGraphics (Caltech Intermediate Format)
.cifIUCr Crystallographic Information File
.cilClip gallery download package (Art Gallery)
.cimC Text Mode Image File (The Ultimate Draw)
.cimGame data (SimCity 2000)
.cinINI file change control file (OS/2)
.cixDatabase index (Turbo C Utilities)
.ck1Game data (iD/Apogee Commander Keen 1)
.ck2Game data (iD/Apogee Commander Keen 2)
.ck3Game data (iD/Apogee Commander Keen 3)
.ck4Game data (iD/Apogee Commander Keen 4)
.ck5Game data (iD/Apogee Commander Keen 5)
.ck6Game data (iD/Apogee Commander Keen 6)
.ckbKeyboard mapping (Borland C++ 4.x)
.clCommon LISP language source code file
.claSource (Clarion)
.classJava bytecode (compiled class - application)
.clbClipbook template (Super NoteTab)
.cldClipper debugger configuration file (CA Clipper)
.clpBitmap graphics (Clip art) (PCPaint - Pictor - Quattro Pro)
.clpClipboard file (Windows 3.x)
.clpCompiler responce file (CA Clipper)
.clrColor binary screen image (1st Reader)
.clrColor definitions (Photostyler)
.clrColor scheme (Boxer/2)
.clsClass definition file (C++, Visual Basic)
.clsClass module (Visual Basic)
.clwMFC Class Wizard information (MS VC++)
.cmBitmap graphics (8bit) (Unix Puzzle)
.cmData (CraftMan)
.cmbXtree for Windows Button Bar file
.cmdBatch file (REXX) (OS/2)
.cmdCommand file (dBASE - Waffle)
.cmdExternal command menu (1st Reader)
.cmfCorel Metafile
.cmfFM-music file (Creative Music File)
.cmkCard (Card Shop Plus)
.cmlCML document (Chemical Markup Language)
.cmmCmm script (CEnvi)
.cmpBitmap graphics (Lead CMP compression)
.cmpCalibration map (Photofinish)
.cmpCompressed data (PKWare compression library)
.cmpData (CraftMan)
.cmpHeader file for PostScript printer files (CorelDraw)
.cmpUser dictionary (MS Word for DOS)
.cmrtData (CraftMan)
.cmuBitmap graphics (Carnegie Mellon University (CMU) Window Manager bitmap Formats)
.cmuwmBitmap graphics (Carnegie Mellon University (CMU) Window Manager bitmap Formats)
.cmvAnimation (CorelMove - CorelDraw 4.0)
.cmxVector graphics (CorelDraw)
.cmykBitmap graphics (raw cyan magenta yellow and black bytes)
.cncCNC general program data
.cnfConfiguration (program - printer setup)
.cnmWindows application menu options and setup file
.cnqShop file (Compuworks Design)
.cntContents tab file (Rational Rose 98)
.cnvData conversion support file (Word for Windows)
.cnvTemporary file (WordPerfect for Win)
.cobCobol language source code file
.cobGraphics (Calgari trueSpace2 File Format)
.codCode definition table (UUPC)
.codDatafile (Forecast Plus - MS Multiplan - StatPac Gold)
.codPrinter code definition file (Boxer/2)
.codProgram compiled code (FORTRAN)
.codSource code in assembler with original C code as comments (MS C)
.codTemplate source file (dBASE Application Generator)
.codVideotext file
.colColor palette (Autodesk Animator - many)
.colSpreadsheet (MS Multiplan)
.comCommand (memory image of executable program) (DOS)
.conConfiguration file (Simdir)
.confConfiguration information (Unix)
.cooCookie file
.coreBitmap graphics (Core Software Tech CORE IDC file)
.cpcCompressed image (Cartesian Perceptual Compression)
.cpdFax Cover document
.cpdScript (Complaints Desk)
.cpeFax Cover document
.cpfFax (The Complete Fax)
.cpiBitmap graphics (Colorlab Processed Image)
.cpiCode Page Information file (DOS)
.cpjCeQuadrat CD ProJect file
.cplColour palette (Corel)
.cplControl panel extension (Windows)
.cplPresentation (Compel)
.cppC++ language source code file
.cppPresentation (CA-Cricket Presents)
.cprPresentation (Corel Presents)
.cpsBackup of startup files (QEMM)
.cpsColor PostScript
.cptBitmap graphics (Corel Photo-Paint)
.cptCompressed Macintosh file archive (Compact Pro)
.cptEncrypted memo file (dBASE)
.cptTemplate (CA-Cricket Presents)
.cpxCompressed drawing (Corel Presentation Exchange)
.cpzMusic text file (COMPOZ)
.craAdvanced crack file (usually text)
.crdCardfile (Windows 3.x - YourWay)
.crfBitmap graphics (Calcomp Raster File) (B&W or 1bit CMYK for printers)
.crfCross-reference (MASM - Zortech C++)
.crkCrack file (usually text)
.crpEncrypted database (dBASE IV)
.crpRun-time presentation (Corel Presents)
.crsFile Conversion Resource (WordPerfect 5.1)
.crtInternet security certificate
.crtTerminal settings information (Oracle)
.cruCompressed file archive (CRUSH)
.cscCorel Script
.csgGraph (Statistica/w)
.cslmBitmap graphics (Zeiss CSLM file)
.csmPrecompiled headers (Borland C++ 4.5)
.cspScreen Image (PC Emcee)
.cssCascading Style Sheet (WWW)
.cssDatafile (CSS - Stats+ - Statistica)
.csvAdjusted EGA/VGA palette (CompuShow)
.csvData file (Comma Separated Values format)
.csyPolymorphic DLL (EPOC)
.ctBitmap graphics (32bit CMYK) (Scitex CT Bitmap) (Scitex scanners)
.ctBitmap graphics (32bit) (Iris CT format) (Iris printers)
.ctcControl file (PC Installer)
.ctfCharacter code translation file (Symphony)
.ctlControl file (dBASE IV - Aldus Setup)
.ctsPermanent location contents (ABC programming language)
.ctxCiphertext file (PGP)
.ctxCourse TeXt file (Microsoft online guides)
.cubeBitmap graphics (Cubicomp/Vertigo image file) (Cubicomp PictureMaker)
.cubiBitmap graphics (Cubicomp/Vertigo image file) (Cubicomp PictureMaker)
.cueMicrosoft Cue Cards data
.cufC Utilities Form definition (Turbo C Utilities)
.curCursor image resource (Resource Workshop - Watcom Resource Editor)
.cursorCursor (Sun Cursor file)
.cutBitmap graphics (Media Cybernetic's Dr.Halo graphics format)
.cvArchive (Corel Versions)
.cvInformation screen (Microsoft CodeView)
.cv4Color file (CodeView)
.cvfCompressed volume (SuperStor)
.cvpCover page (WinFax)
.cvsBitmap graphics (Canvas drawing)
.cvtBackup file for CONVERTed database file (dBASE IV)
.cvwColor file (CodeView)
.cwebC Web
.cwkDocument (ClarisWorks)
.cwlLibrary (ClarisWOrks)
.cwsStationery (ClarisWorks)
.cxScript (CodeMapper)
.cxxC++ language source code file (Zortech C++, gcc)

d

.d63Commodore 64 emulator disk file
.dacSound (TI/MIT DAC format) (byte reversed ADC file)
.datData file (ASCII or binary - many)
.datMerge data (WordPerfect)
.dbConfiguration (dBASE IV - dBFast - MultiEdit)
.dbDatabase (dbVista - Paradox - Smartware - XTreeGold)
.db$Temporary file (dBASE - Modula2)
.db2Database (dBASE II)
.db3Database (dBASE III)
.dbaDatabase (Turbo Prolog - DataEase)
.dbdBusiness data (Business Insight)
.dbdDebug info (Clarion Modula-2)
.dbfDatabase file (dBASE III/IV - FoxPro - dBFast - DataBoss)
.dbgDebugger script (DOS debug - Watcom debuger)
.dbgSymbolic debugging information (MS C/C++)
.dbkDatabase backup (dBASE IV)
.dbmDatafile (DataEase)
.dbmMenu template (DataBoss)
.dboCompiled program (dBASE IV)
.dbsDatafile (Managing Your Money - ProDas - SQL Windows)
.dbsPrinter description file (MS Word - Works)
.dbtDatabase text (Clipper)
.dbtFoxbase+ style memo (FoxPro)
.dbtMemo file for database w/same name (dBASE IV - dBFast)
.dbwWindows file (DataBoss)
.dbxGraphics (DataBeam image)
.dcaDocument Content Architecture text file (IBM DisplayWrite)
.dcfDisk image file
.dclDelphi Component Library (Borland Delphi)
.dcpData CodePage (OS/2)
.dcpDevice code page (OS/2)
.dcrData (Shockwave - Macromedia Director)
.dcsBitmap graphics (Quark Desktop Color Separation EPS file) (QuarkXPress)
.dcsDatafile (ACT! Activity Files)
.dcsDesktop Color Separation file
.dctDatabase dictionary (Clarion Database Developer)
.dctSpell checking dictionary (Clarion - Harvard Graphics 3.0 - Symphony)
.dcuDelphi unit (compiled) (Borland Delphi)
.dcxBitmap graphics (Multipage PCX - many faxes)
.ddCompressed Macintosh file archive (DiskDoubler)
.ddbBitmap graphics
.ddeDynamic Data Exchange (binary)
.ddfDatabase (BTRIEVE)
.ddiDisk image (DiskDupe)
.ddifBitmap graphics (DEC DDIF file)
.ddpDevice Driver Profile file (OS/2)
.debDebug script (DOS Debug)
.decDecoded file
.defAssembly header file (Geoworks Esp)
.defData (SmartWare II)
.defDefaults - definitions
.defLinker definition file (TLink - WLink...)
.demDemo
.demDigital Elevation Model
.demGraphics (VistaPro)
.derInternet security certificate
.desDescription
.descDescription
.devDevice driver
.dfBitmap graphics (Hierarchical Data File) (NCSA)
.dfdData Flow Diagram graphic (Prosa)
.dfdDyadic functions (ABC programming language)
.dfiOutline font description (Digifont)
.dflDefault program settings (Signature)
.dfmData Flow Diagram model file (Prosa)
.dfmForm file (Borland Delphi - C++ Builder)
.dfsDelight Sound File
.dfvPrinting form (MS Word)
.dfxMicrografx Effects DLL
.dgnCAD drawing (vector) (MicroStation)
.dgsDiagnostics
.dhDependency information for .ph (Geoworks)
.dhpBitmap graphics (Dr. Halo PIC)
.dhtDatafile (Gauss)
.diaDiagraph graphics (Computer Support Corporation)
.dibBitmap graphics (Device Independent Bitmap)
.dicDictionary
.difDatabase (Data Interchange Format) (Visicalc)
.difDifference data file (Patch script)
.difDisplay Information File (OS/2)
.diffDifference data file (Patch script)
.dipDebug info processor (Watcom Debugger)
.dirDialing directory file (Procomm Plus)
.dirDirectory file (VAX - CPS Backup)
.dirMovie format (MacroMind Director 4.x)
.disDistribution list (VAX Mail)
.disThesaurus (CorelDraw)
.dizDescription file (Description In Zip)
.dkbRaytraced graphics (DKBTrace)
.dlAnimation (Display - DL Viewer)
.dldData (Lotus 1-2-3)
.dlgDialog resource script file (MS Windows SDK)
.dlgDialog resources (DN)
.dlgDigital Line Graph
.dllDynamic Link Library (Windows 3.x - OS/2)
.dlmData (FileMaker Pro)
.dlsSetup (Norton Disklock)
.dmfMusic format (Delusion Digital Music File) (Delusion)
.dmoDemo (Derive)
.dmpDump file (eg. screen or memory)
.dmsCompressed Amiga file archive (DiskMasher)
.docText document (binary file)
.dogScreen file (Laughing Dog Screen Maker)
.dohDependency information for .poh (Geoworks)
.dosDOS related file (Win95)
.dosExternal command file (1st Reader)
.dotDocument template (MS Word)
.dotLine-type definition file (CorelDraw)
.doxText document (MultiMate 4.0 - MS Word)
.dozDescription Out of Zip (VENDINFO)
.dpCalendar file (Daily Planner)
.dpData file (DataPhile)
.dpPrimary data file (THOR database)
.dpdDyadic predicates (ABC programming language)
.dpjProject (Borland Delphi)
.dprDefault project- and state-related information (Borland C++ - Delphi)
.dpxBitmap graphics (Digital Moving Picture Exchange) (Cineon DPX file)
.drsDisplay Resource (WordPerfect for Win)
.drvDevice driver (for hardware)
.drwVector graphics (Micrografx Designer format)
.ds4Vector graphics (Micrografx Designer 4.x)
.dscDescription file
.dscDiscard file (Oracle)
.dsdDatabase (DataShaper)
.dsfDelusion Digital Sound File (Delusion)
.dskDisk Drivers (Novell NetWare)
.dskProject desktop (Borland C++)
.dsmDigital sound module (DSI)
.dsmMacro (MS Developer Studio)
.dsnDesign (Object System Designer)
.dsnODBC data source
.dspDisplay parameters (Signature)
.dspDynamic Studio Professional Module (Dynamic Studio)
.dspGraphics display driver (Dr.Halo)
.dspProject (MS Developer Studio)
.dsqQuery file (Corel)
.dsrDriver Resource (WordPerfect for Win)
.dssScreensaver file (DCC)
.dssSound (Digital Soup)
.dstWAIN (Scanner spec) data source DLL (Win)
.dswProject workspace (Borland C++ - MS Developer Studio)
.dt_Data fork of a Macintosh file (Mac-ette)
.dtaData file (Turbo Pascal - PC-File - Stata)
.dtdDocument Type Definition
.dtfDatabase file (PFS - Q&A)
.dtpPublication (PageMagic - Publish-It! - Publisher3)
.dvcData (Lotus 1-2-3)
.dviText document (TeX Device Independent File Format) (TeX)
.dvpDevice parameter file (AutoCAD)
.dvpProgram information file (DESQview)
.dw2Drawing (DesignCAD for windows)
.dwbWorkbench (Coryphaeus Software Designer)
.dwcCompressed file archive (DWC)
.dwdDiamondWare digitized sound
.dwfVector graphics (CAD programs)
.dwgDrawing database (vector) (AutoCAD - Drafix) (CAD programs)
.dxCross-reference data (THOR database)
.dxDocument (Data explorer)
.dxText file (DEC WPS/DX format - DEC WPS Plus)
.dxbDrawing binary exchange format (vector) (AutoCAD)
.dxfVector graphics (Drawing Exchange Format) (AutoCAD) (CAD programs)
.dxnFax (Fujitsu dexNET)
.dy22Sound (Dyaxis format) (sampling rate 22k)
.dy44Sound (Dyaxis format) (sampling rate 44k)
.dylDynamic link library (EPOC16)
.dynData (Lotus 1-2-3)

e

.easExtended file attributes (OS/2)
.ebjError-checking object file (Geoworks)
.ebsScript source (Rational Rose 98)
.ebxCompiled script (Rational Rose 98)
.ecPreprosessed GOC source code file (error-checking version) (Geoworks)
.ecgPreprosessed GOC source code file (error-checking version) (Geoworks)
.edtDefault settings (VAX EDT editor)
.edtExternal editors definitions (DN)
.eebEquation editor button bar (WordPerfect for Win)
.eerExecution error messages (Lahey Fortran)
.efsFlowchart (EasyFlow)
.eftHigh resolution screen font (ChiWriter)
.efxFax (Everex EFax)
.egaEGA display font (Ventura Publisher)
.eidiBitmap graphics (Electric Image EIDI file)
.ekaInternal data files (Borland's Eureka)
.elElisp language source code file (Emacs lisp)
.elcCompiled ELISP code (Emacs lisp)
.eliCompressed file archive (ELI)
.eltEvent list (Prosa)
.emfVector graphics (Enhanced Metafile)
.emuTerminal emulation data (BITCOM)
.encEncoded file - UUENCODEd file (Lotus 1-2-3 - uuencode)
.encMusic (Encore)
.endArrow-head definition file (CorelDraw)
.enffExtended Neutral File Format
.engDictionary engine (Sprint)
.engEngine routines (Matlab)
.engEnglish documentation
.engGraphics (charting) (EnerGraphics)
.envData (Novell Envoy)
.envEnveloper macro (WOPR)
.envEnvironment file (WordPerfect for Win)
.eobjObject code (error-checking version) (Geoworks)
.epdPublication (Express Publisher)
.epiEncapsulated PostScript (text and graphics) (Express Publisher)
.epsEncapsulated PostScript (text and graphics) (Adobe Illustrator)
.epsPrinter font (Epson - Xerox...) (Ventura Publisher)
.epsfEncapsulated PostScript file (text and graphics)
.epsiEncapsulated PostScript style preview file
.epsonEpson printer graphics file
.eqfEqualizer Settings file (WinAmp)
.eqnEquation (WordPerfect for Win)
.er1Data (ERWin)
.erdEntity Relationship Diagram graphic file (Prosa)
.ermBitmap graphics
.ermEntity Relationship Diagram model file (Prosa)
.errError log
.errError messages for command line compilers
.ersSatellite image header (ER Mapper file) (Earth Resource Mapping)
.erxData (ERWin)
.eshExtended Shell batch file
.ethDocument (Ethnograph 3)
.etxStructure Enhanced (setext) text
.eucJapanese text (Kanji)
.evpSound envelope (general purpose data curves stored as doubles) (mxv)
.evtEvent descriptions
.evtEvent log
.evyDocument (WordPerfect Envoy)
.ewdDocument (Express Publisher for Windows)
.ewlDocument (Microsoft Encarta)
.ex3Device driver (Harvard Graphics 3.0)
.excExclude file for Optimize (do not process) (QEMM)
.excRexx language source code file (VM/CMS)
.excText document
.exeDirectly executable program (MSDOS)
.exmMsdos executable system-manager compliant (HP calculator)
.expExpress schema (STEP)
.expProtected mode executable program (PharLap)
.extExtension file (Norton Commander)
.exxIntermediate file by MsgPut (IBM LinkWay)
.ezfFax (Calculus EZ-Fax)

f

.fCompressed file archive (Freeze)
.fFortran language source code file (fixed form)
.f01Fax (perfectfax)
.f06Dos screen text font - height 6 pixels (fntcol13.zip)
.f07Dos screen text font - height 7 pixels (fntcol13.zip)
.f08Dos screen text font - height 8 pixels (fntcol13.zip)
.f09Dos screen text font - height 9 pixels (fntcol13.zip)
.f10Dos screen text font - height 10 pixels (fntcol13.zip)
.f11Dos screen text font - height 11 pixels (fntcol13.zip)
.f12Dos screen text font - height 12 pixels (fntcol13.zip)
.f13Dos screen text font - height 13 pixels (fntcol13.zip)
.f14Dos screen text font - height 14 pixels (fntcol13.zip)
.f16Dos screen text font - height 16 pixels (fntcol13.zip)
.f2rMusic (Farandole Linear Module format)
.f3rMusic (Farandole blocked linear module format)
.f77Fortran 77 language source code file
.f90Fortran 90 language source code file (free form)
.f96Fax (Frecom FAX96)
.facBitmap graphics (UNIX Faceserver image file) (Usenix FACE)
.faceBitmap graphics (UNIX Faceserver image file) (Usenix FACE)
.falBitmap graphics (image header information) (Q0 format)
.faqFrequently Asked Questions (text file)
.farMusic (Farandole Composer Module)
.fasCompiled program (Macsyma)
.favFavorites shortcut (MS Outlook)
.faxFax (generic Group 3 1bit encoded data) (most Fax programs)
.fbmFuzzy Bitmap
.fcSpell checking dictionary (Harvard Graphics 2.0)
.fcmBinary file patch file (forward compression) (jlpak10.zip)
.fdDeclaration file (MS Fortran)
.fdField offsets for compiler (DataFlex)
.fdResource file (Front Door)
.fdfForms document (Adobe Acrobat)
.fdwForm (F3 Design and Mapping)
.febFigure editor button bar (WordPerfect for Win)
.feiFatal Error Infotable (Geoworks)
.ffIntelligont FIAS format
.ffOutline font description (Agfa Compugraphics)
.fffFax (defFax)
.ffiAtech FastFont (AllType)
.ffivwFile Format for the Interchange of Virtual Worlds
.fftFast Fourier Transform analysis data
.fftText file (DCA/FFT Final Form Text - DisplayWrite)
.fh3Vector graphics (Aldus FreeHand 3.x)
.fh4Vector graphics (Aldus FreeHand 4.x)
.fiInterface file (MS Fortran)
.fifGraphics (Fractal Image Format)
.figLinker options (Lahey Fortran)
.filFile listing
.filFile template (Application Generator)
.filFiles list object file (dBASE Application Generator)
.filOverlay (WordPerfect)
.finPrint-formatted text file (Perfect Writer - Scribble - MINCE)
.fioGraphics filter (Aldus PhotoStyler)
.fitFile Index Table (Windows NT)
.fitGraphics and data (Flexible Image Transport System)
.fitsGraphics and data (Flexible Image Transport System)
.fixPatch file
.fkyMacro file (FoxPro)
.flSound (Floating format) (hardware dependant not transportable)
.flbFormat library (Papyrus)
.flcAnimation (AutoDesk FLIC format) (Autodesk Animator)
.fldFolder (Charisma)
.fliAnimation (AutoDesk FLIC format) (Autodesk Animator)
.fliTex font library (EmTeX)
.flmFilm Roll (AutoCAD/AutoShade)
.fltData filter file (Alsud - Micrografx Picture Publisher - MS Word)
.fltFlight file (MultiGen)
.fltGraphics filter (Asymetrix ToolBook - Corel)
.flxAnimation format
.flxCompiled binary (DataFlex)
.flxDatabase (Flexstor format)
.fmDatabase (FileMaker Pro)
.fm1Spreadsheet (Lotus 1-2-3 release 2.x)
.fm3Device driver (Harvard Graphics 3.0)
.fm3Spreadsheet (Lotus 1-2-3 release 3.x)
.fmbFile Manager Button bar (WordPerfect for Win)
.fmfFont or icon file (IBM LinkWay)
.fmkMakefile (Fortran PowerStation)
.fmoCompiled format file (dBASE IV)
.fmtFast loading format (TeX)
.fmtFormat file (dBASE IV - FoxPro - Clipper 5 - dBFast - Gate3)
.fmtStyle sheet (Sprint)
.fmvFull Motion Video file
.fn3Font file (Harvard Graphics 3.0)
.fndSaved search (Windows 95)
.fntFont file (many)
.fnxInactive font (Exact)
.fo1Font file (Borland Turbo C)
.fo2Font file (Borland Turbo C)
.fogFontographer Database File (Fontographer3.5)
.folFolder of saved messages (1st Reader)
.fonBitmap font file (many - Windows 3.x font library)
.fonLog of all calls (Procomm Plus)
.fonPhonebook (Terminate - Terminator - Telix)
.fontFont data (unix)
.fopBitmap graphics (Freedom of Press)
.forForm (WindowBase)
.forFortran language source code file (fixed form)
.fotTruetype font styles file (installed font)
.foxFoxbase executable (precompiled .prg) (FoxBase)
.fpConfiguration file (FoxPro)
.fpData (FileMaker Pro)
.fp1Game data (Flying Pigs for Windows)
.fp3Document (FileMaker Pro 3.0)
.fpcCatalog (FoxPro)
.fpdTMT Pascal compiled unit (TMT Pascal)
.fptMemo field tables (FoxPro)
.fpwFloorplan drawing (FloorPLAN plus for Windows)
.fpxBitmap graphics (Kodak FlashPix)
.fr3Renamed dBASE III+ form file (dBASE IV)
.frfFont database file (FontMonger)
.frgUncompiled report file (dBASE IV)
.frlLibrary (GP-Forth)
.frmForm ie. dialog layout (Visual Basic)
.frmFormula (Fractint)
.frmMerge form (WordPerfect)
.frmOrder or registration form (text file)
.frmReport file (dBASE IV - Clipper 5 - dBFast)
.froCompiled report file (dBASE IV)
.frpForm (PerForm PRO Plus - FormFlow)
.frsScreen Font Resource (WordPerfect for Win)
.frtAdditional (FPT) report description file (FoxPro)
.frtGP-Forth language source code file (GP-Forth)
.frxForm stash file (binary) (Visual Basic)
.frxMain (DBF) report description file (FoxPro)
.frzFreeze file (EPOC)
.fsBitmap graphics (Usenix FaceServer file)
.fslForm (Paradox for Windows)
.fsmMusic format (Farandole Composer WaveSample)
.fssdSound
.fstLinkable program (dBFast)
.fsxData (Lotus 1-2-3)
.ftmFont file (Micrografx)
.ftnFortran language source code file (fixed form)
.ftpConfiguration (FTP Software PC/TCP)
.ftpDocument (FTP Voyager)
.ftsFull text search (Windows 95)
.ftsGraphics (Flex Image Transport)
.fwDatabase (FrameWork)
.fw2Database (Framework II)
.fw3Database (Framework III)
.fwebFortran WEB
.fxOn-line guide (FastLynx)
.fxdPhonebook (FAXit)
.fxpExecutable precompiled .prg (FoxPro)
.fxsFax Transmit Format graphics (WinFax)
.fzpDye Sub printing support file (Fargo Primera colour printer)

g

.gData chart (APPLAUSE)
.g16Compiled config (GoldED for DOS)
.g3Bitmap graphics (Group 3 FAX file)
.g8Green channel image data (24bit 3D animation) (Cubicomp PictureMaker)
.g8Raw graphics (one byte per pixel) plane three (PicLab)
.galGallery (Corel Multimedia Manager)
.gamFax (GammaFax)
.gbChinese text
.gbGameboy game
.gblGlobal definitions (VAXTPU editor)
.gblGlobal module in Basic programs
.gc1Lisp language source code file (Golden Common Lisp 1.1)
.gc3Lisp language source code file (Golden Common Lisp 3.1)
.gcdGeneric CAD Drawing format (vector)
.gdfDictionary file (GEOS)
.gdsMcDonnell-Douglas Things
.geConfig file (GEcho)
.gedCompiled config file (GoldED for DOS)
.gedGraphics (Graphic Environment Document) (Arts & Letters)
.gedGraphics editor file (EnerGraphics)
.gefGraphics Exchange Format
.gemVector graphics (Digital Research GEM metafile) (Ventura Publisher)
.genCompiled template (dBASE Application Generator)
.genGenerated text file (Ventura Publisher)
.geoCompiled config file (GoldED for OS/2)
.geoGeode (GEOS executable) (Geoworks)
.gexConfig file (GEcho)
.gfFont file (MetaFont)
.gfbCompressed GIF image (GIFBlast)
.gfiGenigraphics Graphics Link presentation
.gfoSGI Radiosity
.gftFont file (GEM - NeoPaint)
.gfxGenigraphics Graphics Link presentation
.gfxGraphics Files (Instant Artist)
.gibChart (Graph-in-the-Box)
.gidGeneral index (Windows 95 help)
.gifBitmap graphics (GIF87A/GIF89A CompuServe Graphics Interchange Format)
.giffBitmap graphics (GIF87A/GIF89A CompuServe Graphics Interchange Format)
.gimGenigraphics Graphics Link presentation
.gisBitmap graphics (Erdas gray-scale image)
.giwPresentation (Graph-in-the-Box for Windows)
.gixGenigraphics Graphics Link presentation
.gkhDisk Image (VFX SD EPS ASR TS) (Ensoniq)
.gksGraphics Kernel System
.glAnimation (GRASP - GRAphical System for Presentation format)
.glScript (GALink)
.glbGlobal module in Basic programs
.glmDatafile (Glim)
.gloAuxiliary for for glossary (LaTeX)
.gloGlobal module in Basic programs
.glsDatafile (Across)
.glyGlossary (MS Word)
.gmBitmap graphics (Autologic files)
.gm2Bitmap graphics (mode 2 black/white) (Autologic files)
.gm4Bitmap graphics (mode 4 gray-scale) (Autologic files)
.gmfCGM graphics (APPLAUSE)
.gmpGeomorph tile map (SPX)
.gnaGenigraphics Graphics Link presentation
.gntGenerated code (Micro Focus COBOL/2)
.gnxGenigraphics Graphics Link presentation
.goBitmap graphics (GraphOn graphics file)
.gobjObject code (non-error-checking version) (Geoworks)
.gocGOC language source code file (Geoworks)
.goeSatellite image data (GOES file) (McIDAS system)
.goesSatellite image data (GOES file) (McIDAS system)
.gohGoc language header file (Geoworks)
.gouldBitmap graphics (Gould scanner file)
.gpGeode parameter file (Geoworks)
.gpGofer project (Haskell language dialect)
.gp4GTX Group IV format
.gphGraph (Lotus 1-2-3/G)
.gpkCompressed Omnigo file archive (Geos package)
.gqEpson's page description language (printer)
.gr2Screen driver (Windows 3.x)
.graChart (MS Graph 97)
.graDatafile (SigmaPlot)
.graGraph (Microsoft Graph)
.gradsMetafile
.graspAnimation (GRAphical System for Presentation format)
.grayBitmap graphics (raw gray bytes)
.grbBitmap graphics B&W binary (GROB Graphic Object) (HP-48sx calculator)
.grbMs-DOS Shell Monitor file (MS-DOS 5)
.grdDrivers for GRX (graphics library)
.grdefUI resource file (Geoworks)
.grfGraph file (Graph Plus - Charisma)
.gribGridded Binary (FM 92-VIII Ext. GRIdded Binary file) (WMO CBS)
.grnDrivers for GRX (graphics library)
.grpGroup file (Windows 3.x - Papyrus)
.grpPictures group (PixBase)
.gryGraphics (Raw GREY)
.gsGofer script (Haskell language dialect)
.gs1Presentation (GraphShow)
.gsdGSM internet realtime audio
.gsdVector graphics (Professional Draw)
.gsmSound (GSM 6.10 prI-ETS 300 036 13kbit/s) (Internet phones)
.gspSketch (Geometer's Sketchpad)
.gssScript (Geometer's Sketchpad)
.gswWorksheet (GraphShow)
.gtarCompressed file archive (GNU tar)
.gtxRaster graphics (GTX Group IV)
.gupData (PopMail)
.gvGrandView outline file
.gwxGenigraphics Graphics Link presentation
.gwzGenigraphics Graphics Link presentation
.gxlGraphics library (Genus)
.gymGeneric symbol file (Geoworks)
.gzCompressed file archive (GNU Zip)
.gzipCompressed file archive (GNU Zip)

h

.hHeader file
.h!Help database (Flambeaux Help - Perfect Database)
.h++Header file (C++)
.h--Header file (Sphinx C--)
.haCompressed file archive (HA)
.halData file (Hyper Access Lite OS/2)
.hamDisk Drivers NPA (Novell NetWare)
.hapCompressed file archive (HAP)
.hbkHandbook (Mathcad)
.hbmHotline bookmark
.hcHeader file
.hcomSound (Macintosh)
.hdfBitmap graphics (Hierarchical Data File) (NCSA)
.hdfHelp file (Help Development Kit)
.hdlAlternate download file listing (Procomm Plus)
.hdrDatabase header (Pc-File+)
.hdrDatafile (Egret)
.hdrMessage header (Procomm Plus - 1st Reader)
.hdsHierarchical Data System
.hdwVector graphics (Harvard Draw)
.hdxHelp index (AutoCAD - Zortech C++)
.hedDocument (HighEdit)
.helGame data (Microsoft Hellbender)
.hepNovell Help Librarian Data File (Novell NetWare)
.hexEncoded file archive (ascii) (Macintosh BinHex)
.hexHex dump
.hfiHp Font Info file (GEM)
.hglHighlight groups definitions (DN)
.hglVector graphics (HP Graphics Language)
.hhC++ header file
.hhhPrecompiled header file (Power C)
.hhpHelp information for remote users (Procomm Plus)
.hiHigh scores (games)
.higHigh scores (games)
.hinMolecule (HyperChem)
.hipsBitmap graphics (HIPS file)
.hisHistory of executing/viewing/editing (DN)
.hlbHelp library (VMS)
.hlpProgram online help information
.hlxHelp file (MultiEdit)
.hlzPacked help file (MultiEdit)
.hmiMusic (MIDI)
.hmmAlternate Mail Read option menu (Procomm Plus)
.hmpMusic (MIDI)
.hncCNC program files Heidenhain (?) dialog
.hofGame data (best scores)
.hpPrimary hash file (THOR database)
.hpPrintout file for HP printers/plotters (HP/GL)
.hp8Text in HP Roman8 character set (NewWave Write)
.hpfHP LaserJet fonts (PageMaker)
.hpgVector graphics (HPGL plotter file) (AutoCad - Harvard Graphics)
.hpglVector graphics (plotter file) (Hewlett-Packard Graphics Language)
.hpiFont information (GEM)
.hpjHelp project (MS Help Compiler)
.hpjPrinted to file (HP LaserJet)
.hpkCompressed file archive (HPack)
.hplVector graphics (Hewlett-Packerd LasetJet)
.hpljVector graphics (Hewlett-Packerd LasetJet)
.hpmAlternate Main menu for privileged users (Procomm Plus)
.hpmEmm text (HP NewWave)
.hpmHigh Performance Map (Quaestor 1.x)
.hppC++ header (Zortech C++ - Watcom C/C++)
.hppVector graphics (Hewlett-Packard Printer Control Language)
.hppclVector graphics (Hewlett-Packard Printer Control Language)
.hqxEncoded Macintosh archive (ascii) (BinHex)
.hrfBitmap graphics (Hitachi Raster Format) (CADCore)
.hrhCommon header for resources and C++
.hrmAlternate Main menu for limited/normal users (Procomm Plus)
.hrzGraphics (SSTV)
.hsLiterate Haskell source code file
.hs2Monochrome image (Postering)
.hsc2-op FM music file (HSC tracker)
.hsiBitmap graphics (Handmade Software Inc) (Image Alchemy)
.hspWWW page project (HomeSite)
.hstGraphics histogram (HSI raw file) (Handmade Software)
.hstHistory
.htData (HyperTerminal)
.htmHyperText Markup Language document (WWW)
.htmlHyperText Markup Language document (WWW)
.htmlsHyperText Markup Language document with server-side include (WWW)
.httHyperText Template
.htxHTML template (MS FrontPage)
.hwdPresentation (Hollywood)
.hxCross-reference hash file (THOR database)
.hxmAlternate Protocol Selection menu for all users (Procomm Plus)
.hxxC++ header
.hy1Hyphenation algorithms (Ventura Publisher)
.hy2Hyphenation algorithms (Ventura Publisher)
.hycData (WordPerfect)
.hydHyphenation dictionary (WordPerfect for Win)
.hypCompressed file archive (Hyper)
.hzChinese text

i

.iAnalysis data (Phase Vocorder)
.iPreprocessor output file (Borland C Preprocessor)
.i3Interface source (Modula-3)
.iaxBitmap graphics (IBM Image Access eXecutive file)
.ibgPlanetary images by NASA (PDS format)
.ibmCompressed file archive (Internal IBM only) (ARCHDOS)
.icM3CG intermediate language file (Modula-3)
.ic1Bitmap graphics (Atari Image)
.ic2Bitmap graphics (Atari Image)
.ic3Bitmap graphics (Atari Image)
.icaBitmap graphics (Image Object Content Architecture)
.icaCitrix file
.icaIcon archive (IoCA)
.icbBitmap graphics (Targa bitmap)
.iccBitmap graphics (Kodak ICC printer file)
.iceArchive (Cracked LHA) (old Lha)
.icmICC configuration
.icnGraphics (RIP icon)
.icnIcon language source code file
.icoIcon image (Windows 3.x)
.iconIcon image (1bit) (Sun icon file) (Unix)
.icpParameter file (IContact) (Unix)
.icrBitmap graphics (NCSA Telnet Interactive Color Raster graphic file)
.idDisk identification file
.idbDatabase (IDA)
.idcBitmap graphics (Core Software Tech CORE IDC file)
.idcDocument (Internet Database Connector)
.idcIDA C language source code file (IDA)
.iddMIDI Instrument Definition
.ideProject (Borland C++ 4.x)
.idfMIDI instrument definition
.idlInterface definition file (Visual C++)
.idsImported names format (IDA)
.idwVector graphics (IntelliDraw)
.idxHeader information (CMYK image) (Stork format)
.idxIndex (many - FoxPro)
.iefBitmap graphics (Image Exchange Format)
.ifdForm (JetForm Design)
.iffBitmap graphics (Sun TAAC Image File Format)
.iffBitmap graphics or sound (Amiga IFF/8SVX Interchange File Format)
.ifpScript (KnowledgeMan)
.ifsFractal image compressed file (YuvPak)
.ifsInstallable file system (OS/2)
.ifsIterated function system fractal (Fractint)
.igGeneric interface source (Modula-3)
.iges2D or 3D CAD model (Initial Graphics Exchange Specification format)
.igfInset Systems metafile
.igs2D or 3D CAD model (Initial Graphics Exchange Specification format)
.ihpHelp file (Watcom)
.ihsInbound History (Bink/+)
.iiPreprocessed C++ source code (gcc)
.iifInterchange file (QuickBooks for Windows)
.ilInline expansion file (Fortran 90)
.ilhDC Designer Icon Lin Dll format
.ilbData (Scream Tracker)
.ilbmBitmap graphics (Amiga Interleaved Bitmap format)
.ilkOutline of program's format (incremental linker) (MS ILink)
.imBitmap graphics (Sun raster file)
.im1Bitmap graphics (1bit) (Sun raster file)
.im24Bitmap graphics (24bit) (Sun raster file)
.im32Bitmap graphics (32bit) (Sun raster file)
.im8Bitmap graphics (8bit) (Sun raster file)
.imaGraphics (WinImage)
.imaMirage vector graphics (EGO - Chart - Autumn)
.imageDisk Image (Disk Copy, ShrinkWrap)
.imgBitmap graphics (GEM or ADEX format) (Ventura Publisher)
.imgDisk Image (Disk Copy, ShrinkWrap)
.impCompressed file archive (IMP)
.impPascal implementation
.impSpreadsheet (Lotus Improv)
.imqImage presentation (ImageQ)
.imqPlanetary images by NASA (PDS format)
.inInput
.in$Installation file (HP NewWave)
.in3Input device driver (Harvard Graphics 3.0)
.inbTest script (Vermont HighTest)
.incInclude file (several programming languages)
.indData Index (dBASE IV)
.infHypertext help system file (OS/2)
.infInformation (ascii file)
.infSetup information
.infoGNU info reader (output from texinfo) (unix)
.infoIcon Data (Amiga)
.ingrIntergraph Raster File Format
.iniInitialization file
.inkPantone reference fills file (CorelDraw)
.inlC++ inline function implementation
.innOverlay (Micro Focus COBOL/2)
.insDatafile (WordPerfect)
.insInstallation script (1st Reader)
.insInstrument File (Adlib - Ensoniq)
.insInternet communications settings (MS IIS)
.intInterface module source (Borland)
.intIntermediate code (semi-compiled) (Signature - Micro Focus COBOL/2)
.inxIndex (Foxbase)
.ioCompressed file archive (CPIO)
.ioObject file (Modula-3)
.iob3d graphics database in TDDD format
.iocOrganizational chart (Instant ORGcharting!)
.ionDescript.ion file (file descriptions) (4DOS)
.ipData (Interactive Physics)
.ipInspection Procedures (NRC Inspection Manual)
.iplPantone Spot reference palette file (CorelDraw)
.ipsIPScript (IPIX)
.ipxIPIX file (IPIX)
.iqyWeb query file (MS Excel)
.ircSound (IRCAM format)
.irisBitmap graphics (Silicon Graphics RGB image file)
.irsResource (WordPerfect)
.irtpGraphics (Graphicon-2000 Interactive Real-Time PHIGS)
.isIntermediate assembly file (Modula-3)
.isdSpelling Checker dictionary (RapidFile)
.ishCompressed file archive (ISH)
.isoISO-9660 table
.ispInternet service provider settings (MS IIS)
.itMusic (Impulse Tracker)
.itSettings (intalk)
.itfInterface file (JPI TopSpeed Pascal)
.itsInternet Document Set
.iv3D object (Open Inventor format)
.iv-vrmlInventor VRML Format document
.ivbBitmap graphics (Truevision Targa format)
.ivrVirtual reality world (live picture)
.ivtInformation title (InfoViewer)
.iwPresentation flowchart (IconAuthor - HSC InterActive)
.iwScreensaver (Idlewild)
.iwaText document (IBM Writing Assistant)
.iwpText document (Wang)
.ixLinker information (Modula-3)
.iztBinary token file (IZL)

j

.jCompressed file archive (JAR)
.jamJam messagebase (FTN software)
.jamMusic (JamTracker module)
.jarCompressed file archive (Java archive) (JAR)
.jasBitmap graphics (JAS Compressed)
.jascGraphics (JAS Compressed)
.javJava language source code file
.javaJava language source code file
.jbdDatafile (SigmaScan)
.jbfJasc Browser File
.jbigBitmap graphics (1-bit raster image) (Joint Bilevel Image Group)
.jbxProject file (Project Scheduler 4)
.jcmJava commerce message
.jetFax (Hybrid JetFax)
.jffBitmap graphics (JPEG File Interchange Format)
.jfiBitmap graphics (JPEG File Interchange Format)
.jfifBitmap graphics (JPEG File Interchange Format)
.jifBitmap graphics (JPEG File Interchange Format)
.jisJapanese Industry Standard (text)
.jmsMusic format (JMusic file) (UltraForce)
.jn1Game data (Epic MegaGames Jill of the Jungle)
.jobJob object (Scheduler)
.joiJoin conferences file (XBoard)
.jorJournal file (Gupta SQLWindows)
.jouJournal file (VAX Edt editor)
.jpcBitmap graphics (Japan Picture format)
.jpeBitmap graphics (JPEG Joint Photography Experts Group format)
.jpegBitmap graphics (JPEG Joint Photography Experts Group format)
.jpgBitmap graphics (JPEG Joint Photography Experts Group format)
.jrcCompressed file archive (JRchive)
.jsJavaScript language source code file (script)
.jsmJigsaw file (JugWin)
.jssJigsaw file (JugWin)
.jtfBitmap graphics (JPEG Tagged Interchange Format)
.jtfFax (Hayes JT Fax)
.jutJutvision Scene (Jutvision)
.jwText document (JustWrite)
.jwlLibrary (JustWrite)
.jzzSpreadsheet (Jazz)

k

.k3dDescription of macro language (3DS)
.karKaraoke (MIDI music with word track)
.karPrecompiled .prg for KARAT (Rus. FOX+ 2.0)
.kbKeyboard script (Borland C++ 4.5)
.kbProgram source (Knowledge Pro)
.kbdKeyboard mapping (LocoScript - Signature - Procomm Plus)
.kbmKeyboard mapping (Reflection 4.0)
.kclLisp language source code file (Kyoto Common Lisp)
.kdcBitmap graphics (Kodak Digital Camera) (PhotoEnhancer)
.kdkBitmap graphics (Kodak proprietary decimated TIFF format)
.kexMacro (KEDIT)
.keyArchive .key-file (OS/2)
.keyDatafile (Forecast Pro)
.keyKeyboard macros
.keySecurity file eg. Registration info
.kfxGraphics (Group 4 image) (KoFax)
.kitPower Chords drum kit file (Power Chord)
.kmlKedit Macro Library
.knnDatabase key file (Clarion)
.kppToolpad (SmartPad)
.kpsIbm KIPS bitmap graphics
.kqpBitmap graphics (Konica Quality Photos)
.krzKurzweil K2000 File (Kurzweil)
.kybKeyboard mapping (FTP Software PC/TCP)
.kyeGame data (Kye)

l

.lL-System fractal (Fractint)
.lLex language source code file
.lLinker directive file (WATCOM wlink)
.lLisp language source code file
.laNetscape packetized audio (LiveAudio)
.labDatafile (NCSS - SOLO)
.labMailing labels (Q+E for MS Excel)
.lamStreaming audio metafile (Netscape Media Player)
.lanBitmap graphics (Erdas true colour image)
.lanLAN Drivers (Novell NetWare)
.landsatBitmap graphics (EOSAT's Landsat Thematic Mapper data file)
.latexText document (LaTeX)
.layWord chart layout (APPLAUSE)
.lbgLabel generator data (dBASE IV)
.lblLabel (dBASE IV - Clipper 5 - dBFast)
.lbmBitmap graphics (Amiga Interleaved Bitmap format) (Deluxe Paint)
.lbmLinear bitmap graphics (XLib)
.lboCompiled label (dBASE IV)
.lbrCompressed file archive (LU)
.lbrDisplay driver (Lotus 1-2-3)
.lbtAdditional (FPT) label description file (FoxPro)
.lbxMain (DBF) label description file (FoxPro)
.lcfLinker Control File (Norton Guides compiler)
.lchChart (IBM Works for OS/2)
.lckLock file (especially for database access control)
.lclData (FTP Software PC/TCP)
.lcnLection (WordPerfect)
.lcsDatafile (ACT! History Files)
.lcwSpreadsheet (Lucid 3-D)
.ldLong Distance codes file (Telix)
.ld1Overlay file (dBASE)
.ldbData filer database (IBM Works for OS/2)
.ldbRecord-locking information (MS Access)
.ldfData filer form (IBM Works for OS/2)
.ldfLibrary definition file (Geoworks)
.leExecutable image (DOS/4GW PM 32X DOS Extender)
.legDocument (Legacy)
.lesLesson (check *.cbt)
.levLevel file (eg. NetHack 3.x)
.lexLexicon (dictionary) (many)
.lfdLucasArts resource file (LucasArts games)
.lftLaser printer font (ChiWriter)
.lgCompressed file archive (Arhangel)
.lgLogo procedure definitions (LSRHS Logo)
.lgoLogo for header and footer (SuperFax)
.lgoStartup logo code (Windows 3.x)
.lhaCompressed file archive (LHA - LHARC)
.lhsLiterate Haskell source code file
.lhwCompressed Amiga file archive (LHWarp)
.lhzCompressed file archive (LHA)
.libLibrary file (several programming languages)
.licLicense file
.lifCompressed file archive (CA Clipper installer)
.lifLogical Interchange Format data file (Hewlett-Packard)
.limCompressed file archive (Limit)
.linLine types (AutoCAD)
.linVector data (ARC format)
.lisListing (VAX)
.lispmBitmap graphics (Lisp Machine file)
.ljBitmap graphics (HP LaserJet graphics file)
.lkuT9000 linkable unit
.ll3Laplink III related file (document) (LapLink III)
.lmaNetscape packetized audio (LiveAudio)
.lmpDemo for Doom (3D computer game) (Doom - Doom2)
.ln03Bitmap graphics (DEC LN03+ Sixel file)
.lngLanguage definition file
.lngLanguage extensions (Lahey Fortran)
.lnkLink (shortcut) (Windows 95)
.lnkLinker script (.RTLink)
.locLocalisation string resource header file
.lodLoad file
.lofAuxiliary file for List Of Figures (LaTeX)
.logLog file
.lotAuxiliary file for List Of Tables (LaTeX)
.lpcPrinter driver (TEKO)
.lpcSound (Linear Predictive Coding)
.lpdNuts and Bolts file (Helix)
.lrcIntel Video Phone file
.lrfLinker response file (MS C/C++)
.lrpReport (IBM Works for OS/2)
.lrsLanguage Resource File (WordPerfect for Win)
.lrtLog file (Yacc)
.lsaAscii data (LightScape Technologies)
.lsbBinary data (LightScape Technologies)
.lspLisp language source code file (AutoLISP - Xlisp)
.lssSpreadsheet (Legato - IBM Works for OS/2)
.lstKeyboard macro (1st Reader)
.lstList file (archive index - compiler listfile)
.lstListing (e.g. source code)
.lstSpool file (Oracle)
.ltmBitmap graphics (EOSAT's Landsat Thematic Mapper data file)
.ltmForm (Lotus Forms)
.ltxMathematical text document (LaTeX)
.lwdText document (LotusWorks)
.lwobLightwave Object Format
.lwpDocument (Lotus Word Pro)
.lwpWord processor (IBM Works for OS/2)
.lyrSong lyrics (ascii)
.lzdDifference file for binaries (Ldiff 1.20)
.lzhCompressed file archive (LHA - LHARC)
.lzsCompressed file archive (LARC)
.lzwCompressed Amiga file archive (LHWarp)

m

.mCommon binary file name extension (Maple)
.mFunction and commands (Matlab M-file - Mathematica)
.mMacro module (Brief)
.mObjective-C language source code file (gcc)
.mScript file (Miranda programming language)
.mStandard package (Mathematica)
.m11Sound (Farallon's MacRecorder format) (sampling rate 11k)
.m11Text file (MASS11)
.m1aMPEG-1 audiostream
.m1sMPEG-1 systemstream
.m1vMPEG-1 IPB videostream
.m2Modula 2 language source code file
.m22Sound (Farallon's MacRecorder format) (sampling rate 22k)
.m2aSound (MPEG-2 audio)
.m2vVideo (MPEG-2 IPB videostream)
.m3Modula3 language source code file
.m3aSound (MPEG-3 audio)
.m3d3d animation macro (Corel Motion)
.m3uSound reference (MPEG URL)
.m4M4 preprocessor file (unix)
.m7Sound (Farallon's MacRecorder format) (sampling rate 7k)
.m_uBackup of boot sector FAT and boot dir (MazeGold)
.maAscii file (notebook) (Mathematica)
.mahDC products for MicroApp executable files (MicroApp)
.ma3Macro (Harvard Graphics 3.0)
.macBitmap graphics B&W (Apple Macintosh MacPaint file)
.macMacro
.macpBitmap graphics B&W (Apple Macintosh MacPaint file)
.madModule shortcut (MS Access)
.mafForm shortcut (MS Access)
.magWoody Lynn's MAG graphics format (MPS Magro Paint System)
.mahSettings (Mahjongg Solitaire)
.maiMail message (VAX)
.makProject makefile
.mamMacro shortcut (MS Access)
.manFormatted manual page
.mapColor palette (colormap intensities and indices)
.mapFormat data (Micrografx Picture Publisher)
.mapGeographical map (Atlas MapMaker)
.mapLinker map file
.mapNetwork map (AccView)
.maqQuery shortcut (MS Access)
.marAssembly program (VAX Macro)
.marReport shortcut (MS Access)
.marmMakefile for MARM platform (EPOC)
.masSmartmaster set (Freelance Graphics)
.matMatrix data file (Matlab)
.matTable shortcut (MS Access)
.maxMax language source code file
.maxScene (3D Stdio Max)
.mazData (dVS/dVISE)
.mazGame data (Hover maze)
.mbBinary file (bitmaps etc.) (Mathematica)
.mbMemo field values for database (Paradox)
.mb1Game data (Apogee Monster Bash)
.mbfavsBitmap graphics (24bit) (AVS X image file)
.mbfavsBitmap graphics (AVS X image file)
.mbfxBitmap graphics (24bit) (AVS X image file)
.mbfxBitmap graphics (AVS X image file)
.mbkMultiple index file backup (dBASE IV)
.mbmMulti-bitmap file (EPOC)
.mbxMailbox (Eudora/Zerberus)
.mcM3CG intermediate language file (Modula-3)
.mcManual Chapter (NRC Inspection Manual)
.mc$Magic Xchange package (Magic Cap file archive)
.mccConfiguration file (Mathcad)
.mccDialer10 calling card
.mccShortcut to MSN (Windows 95)
.mcdDocument (Mathcad)
.mcfFont file (Mathcad)
.mcfGraphics (Hotsauce)
.mciCommand script (Media Control Interface)
.mclMacro library (MultiEdit)
.mcpApplication script (Capsule)
.mcpComposed Media multimedia file (NetMC Player)
.mcpPrinter driver (Mathcad)
.mcsImage (MathCAD)
.mcwText document (MacWrite II - MS Word for Macintosh)
.mdCompressed file archive (MDCD)
.mdaAdd-in (MS Access)
.mdbDatabase (MS Access)
.mdeMDE database (MS Access)
.mdlGeometrical model (3D Design Plus)
.mdlObject design model (Rational Rose 98)
.mdlSpreadsheet (CA-Compete!)
.mdmModem definition (TELIX)
.mdnBlank database template (MS Access)
.mdpProject workspace (MS Developer Studio)
.mdrMicrodrive file (ZX Spectrum emulator)
.mdtAdd-in data (MS Access)
.mdtData table (MS ILink incremental linker)
.mdwWorkgroup information (MS Access)
.mdxMultiple index file (dBASE IV)
.mdzDatabase wizard (MS Access)
.mdzDescription of music module (Cubic Player - Cross-View)
.meAscii text (READ.ME)
.meConfiguration (MultiEdit)
.meFormatted manual page with me macros
.mebMacro Editor bottom overflow file (WordPerfect Library)
.mecMECCA source (Maximus)
.medMacro Editor delete save (WordPerfect Library)
.medMusic format (Amiga MED/OctaMED)
.memMacro Editor macro (WordPerfect Library)
.memMemory variable save file (Clipper - dBASE IV - FoxPro)
.memMemos datafile (Clarion)
.meqMacro Editor print queue file (WordPerfect Library)
.merMacro Editor resident area (WordPerfect Library)
.mesMacro Editor work space file (WordPerfect Library)
.mesMessage
.metDocument (Omnipage Pro)
.metGraphics metafile (OS/2)
.metMacro Editor top overflow file (WordPerfect Library)
.metMetafile (OS/2)
.meuMenu group (DOS Shell)
.mexDynamically linked subroutines (Macintosh) (Matlab)
.mexMacro Editor expound file (WordPerfect Library)
.mex4Dynamically linked subroutines (Sun-4/SPARC) (Matlab)
.mexdsDynamically linked subroutines (DECStation) (Matlab)
.mexhp3Dynamically linked subroutines (HP9000/series 300) (Matlab)
.mexhp7Dynamically linked subroutines (HP9000/series 700) (Matlab)
.mexnDynamically linked subroutines (NeXT) (Matlab)
.mexrs6Dynamically linked subroutines (IBM RS/6000) (Matlab)
.mexsgDynamically linked subroutines (SGI) (Matlab)
.mfMetafont text file (TeX)
.mfdMonadic functions (ABC programming language)
.mfjMetaFont job (batch input)
.mfmMusic format (DMP)
.mftStyle file (MetaFont source formatter)
.mgGeneric module source (Modula-3)
.mgfFont (Micrografx)
.mgfMaterials and Geometry Format
.mgrBitmap graphics (MGR bitmap file)
.mgxDrawing (Designer 4.1)
.mhtMessage HTML document
.mhtmlMessage HTML document
.miMiscellaneous
.mibSNMP MIB file
.micData (Microsoft Image Composer)
.midMusic (Musical Instrument Digital Interface)
.midiMusic (Musical Instrument Digital Interface)
.mifData (FrameMaker)
.miffBitmap graphics (Magick Image File Format)
.miiDatafile (MicroStat-II)
.milRaster graphics (CALS Group IV Type 2)
.mimeMessage in MIME format (RFC822)
.misMission file (many games)
.mitsuBitmap graphics (Mitsubishi S340-10 color sublimation printer file)
.mixObject file (Power C)
.mkMakefile
.mkeMakefile (MS Windows SDK)
.mkgMakefile
.mkiJapanese graphics MAKIchan format (MagView 0.5)
.mksData (TACT)
.mlML language source code file
.ml3Project (Milestones 3.x)
.mlbMacro library file (Symphony)
.mliMaterials libraries (3D Studio)
.mlmSaved email (Novell GroupWise using WP5.1 format)
.mmText document (MultiMate Advantage II)
.mmVirtual reality world (Meme)
.mmfMail message file (MS Mail)
.mmmMultimedia movie format (RIFF RMMP) (MacroMind Director 3.x)
.mmoMemo writer file (RapidFile)
.mmpOutput video format from Bravado board
.mmpmakmake makefile project (EPOC)
.mndMenu source (AutoCAD Menu Compiler)
.mngBitmap graphics (Multiple-image Network Graphics)
.mngMap (DeLorme Map'n'Go)
.mntAdditional (FPT) menu description file (FoxPro)
.mnuAdvanced macro (HP NewWave)
.mnuMenu (many)
.mnxCompiled menu (AutoCAD)
.mnxMain (DBF) menu description file (FoxPro)
.mnyAccount book (MS Money)
.moObject file (Modula-3)
.mobDevice definition (PEN Windows)
.modKernel module (Windows 3.x)
.modModel definitions (EPOC)
.modModula-2 language source code file (Clarion Modula-2)
.modMusic (Amiga MODule format) (DMP - FastTracker - MDP - ST)
.modSpreadsheet (Microsoft Multiplan)
.moilisez.moi (read.me in French)
.molMDL Molfile
.monMonitor description (ReadMail)
.mooMoonRock language source code file (MoonRock)
.movMovie (AutoCAD AutoFlix)
.movTimebased multimedia file (Apple QuickTime)
.mozTemporary cache file (Netscape)
.mpMovie (MPEG compressed)
.mp2Sound (MPEG-1 Layer II Audio Stream)
.mp3Sound (MPEG-1 Layer III Audio Stream)
.mpaSound (MPEG-1 audio stream)
.mpcCalender file (MS Project)
.mpdMonadic predicates (ABC programming language)
.mpeMovie (Moving Pictures Expert Group format)
.mpegMovie (Moving Pictures Expert Group format)
.mpgMovie (Moving Pictures Expert Group format)
.mpmMathplan macro (WordPerfect Library)
.mpntBitmap graphics (Apple Macintosh MacPaint file)
.mppProject file (MS Project)
.mprGenerated executable menu file (FoxPro)
.mptBitmap graphics (Multipage TIFF)
.mpvView file (MS Project)
.mpxCompiled executable menu file (FoxPro)
.mrbMultiple Resolution Bitmap graphics (MS C/C++)
.mrcBibliographic data (Machine-Readable Cataloging records)
.mrkCSI markup file (CAD format)
.mrkWindows User Benchmark (Windows 95)
.mrsMacro Resource file (WordPerfect for Win)
.msFormatted manual page with ms macros
.msIntermediate assembly file (Modula-3)
.msMicrosoft antivirus report (MSAV)
.msWorksheet (Maple)
.mscMicrosoft C makefile
.msdlManchester Scene Description Language
.msgDigitized voice file (ZVoice)
.msgMessage(s)
.msnMicrosoft Network document
.mspBitmap graphics (Microsoft Paint format)
.mssManuscript text file (Perfect Writer - Scribble - MINCE - Jove)
.mstDocument (MS Test)
.mstMinispecification file (Prosa)
.mstSetup script (MS Windows SDK)
.mswText document (MS Word)
.msxCompressed CP/M file archive (MSX)
.mthMath file (Derive)
.mtlWavefront
.mtmMusic (MultiTracker Module)
.mtvBitmap graphics (24bit) (MTV RayTracer)
.mtwData file (Minitab)
.muMenu (Quattro Pro)
.musSound file (MusicTime - Doom)
.mvbData (Microsoft Multimedia Viewer)
.mvfStop frame file (AutoCAD AutoFlix)
.mviMovie command file (AutoCAD AutoFlix)
.mvpProject (MediaView)
.mvwLog file (Saber LAN)
.mwText document (MacWrite II)
.mwfAnimation (ProMotion)
.mwiiText document (MacWrite II)
.mwpSmartMaster (Lotus Word Pro)
.mxCommon matrix routines (Matlab)
.mxLinker information (Modula-3)
.mx3Dynamically linked subroutines (80386/486 MS-Windows) (Matlab)
.mxlSupport file (PackRat 5.0)
.mxtData (MS C)
.mypPresentation (MM Make Your Point)

n

.namName Space Modules (Novell NetWare)
.napVector graphics (Naplps format) (VideoShow - EnerGraphics)
.naplpsVector graphics (North American Presentation Layer Protocol Syntax)
.nbText document (Nota Bene)
.ncGraphics (Unidata netCDF)
.ncInstructions for NC (Numerical Control) machine (CAMS)
.ncPreprosessed GOC source code file (non-error-checking version) (GEOS)
.ncbClass browsing information (MS Developer Studio)
.nccCNC (Computer Numeric Control) control file (CamView 3D)
.ncdInternal tree data (Norton ChangeDirectory)
.ncmConfiguration message (Nokia Communicator)
.ncsNetscape Conference Call file (Netscape)
.ncsaBitmap graphics (Hierarchical Data File) (NCSA)
.ndbNetwork database (Intellicom - Compex)
.ndlData (Lotus Notes)
.ndlInmos hardware network description file
.ndlNodelist file
.ndxIndex file (dBASE II - III - IV - dBFast)
.neoBitmap graphics (Atari NeoChrome image file)
.netNetwork configuration/info file
.netcdfScientific data Network Common Data Format
.newNew info
.newsBitmap graphics (NeWS image file)
.nffHaines Neutral File Format
.nffNeutral File Format (WorldToolKit)
.nfoFilioview database
.nfoHelp format (Netware Folio)
.nfoInfo file
.ngOnline documentation database (Norton Guide)
.ngoNG linker object file (NGML)
.ngsNG compiler source file (NGC)
.nifBinary hardware network initialisation file
.nifBitmap graphics (Navy Interchange File Format)
.niffBitmap graphics (Navy Interchange File Format)
.nitfNational Imagery Transmission Format
.nlNorton Desktop Icon Library
.nlmNetware loadable module (Novell Netware)
.nlxForm (FormWorx 3.0)
.notNotation or note
.noteHelp document (WordPerfect for Mac)
.nowUsually README file
.npProject schedule (Nokia Planner) (Visual Planner 3.x)
.npiSource for DGEN.EXE interpreter (dBASE Application Generator)
.nrfBitmap graphics (Neutral Raster File)
.ns2Data (Lotus Notes)
.ns3Data (Lotus Notes)
.nsfData (Lotus Notes)
.nsgData (Lotus Notes)
.nshData (Lotus Notes)
.nssNorton screensaver module (NC - NDW Screen Saver)
.nstMusic module (NoiseTracker)
.nsxCompound index file (SuccessWare SIX 3.00)
.ntStartup files (Windows NT)
.ntfData (Lotus Notes)
.ntrExecutable ascii text file (strip header and rename) (NetRun)
.ntsExecutable ascii text file (strip header and rename) (NetSend)
.ntsTutorial (Norton)
.ntxDatabase index (Clipper 5)
.nufMessage for new users on their 1st call (Procomm Plus)
.nwsInfo text file (latest news) (ascii)
.nxtSound (NeXT format)

o

.oObject file (Unix - Atari - GCC)
.o$$Outfile (Sprint)
.oazFax (NetFax Manager)
.obObject cut/paste file (IBM LinkWay)
.obdBinder (MS Binder)
.objCompiled machine language code (Intel Relocatable Object Module)
.objObject (Wavefront)
.obrObject browser data file (Borland C++)
.obsScript (ObjectScript)
.obtTemplate (MS Binder)
.obvVisual interface (ObjectScript)
.obzWizard (MS Binder)
.ocfObject Craft File (Object Craft)
.ocrIncoming fax transcribed to text (FAXGrapper)
.octMusical file (Octalizer)
.ocxOLE custom control (Object Linking and Embedding)
.odaODA document
.odaRaster graphics (CALS Group IV Type 2)
.odifOpen Document Interchange Format
.odlObject Definition Language file (MS Developer Studio)
.ofdForm definition (ObjectView)
.offVector graphics (Object File Format)
.ofmPostScript font description file
.ofnDocument (MS Office)
.oftItem template (MS Outlook)
.ohsOutbound History (Bink/+)
.oidObject interaction diagram (Prosa/OM)
.oktMusic format (8 channels) (Oktalyzer)
.olbOLE object library
.olbObject library (VAX)
.oldBackup file
.oleOLE object
.oliText file (Olivetti)
.olkAddress book (MS Outlook)
.omdClass model (Prosa/OM)
.omfOMF Interchange file
.oomSwap file (Shroom)
.opaObject file (Psion OPL)
.oplOPL language source code file (Psion)
.opnActive options (Exact)
.opoObject file (Psion OPL)
.optOptimize support file (QEMM)
.optOptions
.opwOrganization chart (Org Plus for Windows)
.opxChart (MS Organization)
.opxInactive options (Exact)
.or8Oracle 8 database model report (Rational Rose Oracle8)
.oraParameter file (Oracle)
.orgCalendar file (Lotus Organizer)
.orgOrigin plot (Microcal Origin)
.ossSearch result (MS Office)
.otlOutline font description (Z-Soft Type Foundry)
.otlVentura Publisher's Type Foundry Outline Editor format
.otxText file (Olivetti Olitext Plus)
.outOutput
.ov1Overlay file (part of program to be loaded when needed)
.ov2Overlay file (part of program to be loaded when needed)
.ovdDatafile (ObjectVision)
.ovlOverlay file (part of program to be loaded when needed)
.ovrOverlay file (part of program to be loaded when needed)

p

.pDatabase source code (Progress)
.pGraphics (Applause picture file)
.pPascal language source code file
.pRea-C-Time application parameter file (ReaGeniX code generator)
.p10Tektronix Plot 10 drawing
.p16Music (16 channels) (ProTracker Studio 16)
.p22Patch file (Patch22)
.p65Document (PageMaker 6.5)
.pa1Worktable (PageAhead)
.pabPersonal address book
.pacBitmap graphics (Atari STAD Image)
.pacPackage or song (SBStudio II)
.padKeypad definition (Telemate)
.paintBitmap graphics B&W (Apple Macintosh MacPaint file)
.pakCompressed file archive (PAK)
.palColor palette
.panPrinter-specific file (copy to coreldrw.ink) (CorelDraw)
.parParameter file (Fractint)
.parParts application (Digitalk PARTS)
.parPermanent output file (Windows 3.x)
.pasPascal language source code file (Pascal - Delphi)
.patBitmap graphics (1bit) (Patent data) (US Patent and Trademark Office)
.patHatch patterns (AutoCAD - Photostyler)
.patPolygon Attribute Table (link geographic locations to databases)
.patSound patch (Gravis Ultrasound)
.patVector fill files (CorelDraw)
.pbFax (FAXability Plus)
.pbPhonebook (WinFax Pro)
.pbProboard configuration files (Proboard)
.pbSetup file (PixBase)
.pb1Document (First Publisher for Windows)
.pbaPowerbasic BASIC language source code file (Genus)
.pbdPhone book (FaxNOW! - Faxit)
.pbiPowerbasic include file (Genus)
.pbiProfiler Binary Input (MS Source Profiler)
.pbkPhonebook
.pblPowerbasic library (Genus)
.pbmBitmap graphics (Poskanzer's Portable Bit Map format)
.pbmPlanar bitmap graphics (XLib)
.pboProfiler Binary Output (MS Source Profiler)
.pbtProfiler Binary Table (MS Source Profiler)
.pcText file containing IBM PC specific info
.pc1Bitmap graphics (Atari Degas Image)
.pc2Bitmap graphics (Atari Degas Image)
.pc3Bitmap graphics (Atari Degas Image)
.pc3Custom palette (Harvard Graphics 3.0)
.pc8Ascii text IBM8 character set (NewWave Write)
.pcbP-CAD database (P-CAD)
.pccCutout picture vector graphics (ZSoft PC Paintbrush)
.pcdBitmap graphics (multi-resolution) (Kodak Photo-CD)
.pcfProfiler Command File (MS Source Profiler)
.pchPatch file
.pchPrecompiled header (MS C/C++)
.pcjMultimedia authoring tool graphics (IBM's Linkaway-Live)
.pckPickfile (Turbo Pascal)
.pclHP-PCL graphics data (HP Printer Control Language)
.pcpBitmap graphics (PCP file)
.pcsAnimated PICTs (Macintosh)
.pcsPicture package (MS PowerPoint - MS ClipArt Gallery)
.pctBitmap graphics (Macintosh b&w PICT1 - color PICT2)
.pcwText document (PC Write)
.pcxBitmap graphics (ZSoft PC Paintbrush format)
.pdaBitmap graphics
.pdbData (TACT - Packrat 5.0)
.pdfDatabase Interchange Format (PCAD)
.pdfGraphics file (ED-SCAN 24bit format)
.pdfPackage definition file (download info) (Microsoft SMS)
.pdfPortable Document Format (Adobe Acrobat)
.pdfPrint device information (Netware)
.pdgData (Print Shop Deluxe)
.pdlProject Description Language file (Borland C++ 4.5)
.pdsPldasm language source code file (hardware assembly)
.pdsSpace mission data (Planetary Data System Format) (NASA)
.pdvPrinter driver (Paintbrush)
.pdwDocument (Professional Draw)
.pdxPrinter description (PageMaker)
.pebProgram Editor bottom overflow file (WordPerfect Library)
.pedProgram Editor delete save (WordPerfect Library)
.pemProgram Editor macro (WordPerfect Library)
.peqProgram Editor print queue file (WordPerfect Library)
.perProgram Editor resident area (WordPerfect Library) (vakioalue)
.pesProgram Editor work space file (WordPerfect Library)
.petProgram Editor top overflow file (WordPerfect Library)
.pexProboard EXecutable program file (Proboard)
.pfaType 3 font file (unhinted PostScript font)
.pfbType 1 PostScript font (Adobe Type Manager)
.pfcPF Component
.pfcText file (First Choice)
.pfkProgrammable function keys (XTreePro)
.pflPortfolio (Lotus Freelance)
.pfmPrinter Font Metrics (Windows Type 1 font metric file)
.pfsDatabase (PFS:FILE) - text file (PFS:Write)
.pftPrinter font (ChiWriter)
.pgPage cut/paste file (IBM LinkWay)
.pgiPrinter Graphics File device driver (PGRAPH library)
.pglVector graphics (HP Plotter)
.pgmBitmap graphics (PBM graymap)
.pgmProgram (Signature)
.pgpEncrypted file (Pretty Good Privacy)
.pgsManual page (man4dos)
.phOptimized .goh include file (Geoworks)
.phPerl header file
.phPhrase-table (MS C/C++)
.phdPolyHedra Database
.phmPhone book (DN - Lync)
.phnPhone list (UltraFax - QmodemPro)
.phoPhone database (Metz Phone for Windows)
.phrPhrases (LocoScript)
.pi1Bitmap graphics (Atari Degas Image)
.pi2Bitmap graphics (Atari Degas Image)
.pi3Bitmap graphics (Atari Degas Image)
.picBitmap graphics (Macintosh) (b&w PICT1 - color PICT2)
.picBitmap graphics (PIXAR picture file)
.picBitmap graphics (Pictor page format) (many)
.picioBitmap graphics (PIXAR picture file)
.picsAnimated PICT files (Macintosh)
.pictBitmap graphics (Apple Macintosh PICT file) (b&w PICT1 - color PICT2)
.pict2Bitmap graphics (Apple Macintosh PICT file)
.pidProcess ID file (Unix)
.pifGraphics metafile (OS/2)
.pifProgram Information File (Windows 3.x)
.pifVector graphics GDF format (IBM mainframe computers)
.pimPascal text mode image file (Ultimate Draw)
.pinGame data (Epic Pinball)
.pitCompressed Macintosh file archive (PackIt)
.pixBitmap graphics (24bit RGB RLE) (Alias image file)
.pixBitmap graphics (Inset Systems format)
.pixarBitmap graphics (PIXAR picture file)
.pjBitmap graphics (HP PaintJet PCL graphics file)
.pjProject (CA-SuperProject)
.pjtAdditional (FPT) project description file (FoxPro)
.pjtProject (Visual C++)
.pjxMain (DBF) project description file (FoxPro)
.pjxlBitmap graphics (HP PaintJet XL PCL graphics file)
.pkPacked bitmap font file (TeX DVI drivers)
.pkaCompressed file archive (PKArc)
.pkgInstaller script (Next)
.pkgPackage (AppleLink - MS Developer Studio)
.pkgdatabase (P-CAD)
.pkrPublic Keyring (PGP)
.pktFidonet message packet
.pktReadable contents of .pk (TeX font)
.plPalette (Harvard Graphics)
.plPerl script language source code file
.plProlog language source code file
.plProperty List font metric file (TeX)
.pl1Room plan (3D Home Architect)
.pl3Chart palette (Harvard Graphics 3.0)
.plbLibrary (FoxPro - P-CAD)
.plcAdd-in file (functions - macros - applications) (Lotus 1-2-3)
.plcDatabase (P-CAD)
.plgBuild log (MS Developer Studio)
.pllPrelinked library (CA Clipper)
.plnSpreadsheet (WordPerfect for Win)
.plotVector graphics (Unix Plot(5) format)
.pltPalette
.pltPaper format (Page Magic 2.0)
.pltPre-linked transfer file (Clipper 5)
.pltSoftware platform file (Geoworks Glue, EPOC)
.pltTable for .pll (CA Clipper)
.pltVector graphics (HPGL plotter) (AutoCAD Plot)
.plyData (PopMail)
.plyPresentation screen (Harvard Spotlight)
.plyZipPack
.pmBitmap graphics (8bit text) (X Window PixelMap)
.pmBitmap graphics (Presentation Manager)
.pmPerl
.pm3Document (PageMaker 3)
.pm4Document (PageMaker 4)
.pm5Document (PageMaker 5)
.pm6Document (PageMaker 6)
.pmaData (Performance Monitor)
.pmcData (Performance Monitor)
.pmcGraphics (A4TECH Scanner)
.pmiProgram manager information (OS/2)
.pmlData (Performance Monitor)
.pmmProgram file (Amaris BTX/2)
.pmrData (Performance Monitor)
.pmwData (Performance Monitor)
.pn3Printer device driver (Harvard Graphics 3.0)
.pnfBitmap graphics (Portable Network graphics Frame) (standalone stream)
.pnfPrecompiled setup information (Windows)
.pngBitmap graphics (Portable Network Graphics)
.pnmBitmap graphics (PBM Portable aNyMap)
.pntBitmap graphics (Apple MacPaint format)
.pntPointlist segment (FTN software)
.pntQwk reader pointer file (MarkMail 2.x)
.pntVector point data (ARC format)
.pntgBitmap graphics B&W (Apple Macintosh MacPaint file)
.pohOptimized .goh include file (Geoworks)
.polPolygon Models Format (InnovMetric Software)
.pooString pool (INITeX)
.popMessages index (PopMail)
.popPop-up menu object (dBASE Application Generator)
.potContinuous potential image (Fractint)
.potTemplate (MS PowerPoint)
.povRaytraced graphics image (Persistance Of Vision)
.powInstrument or song file (PowerChords)
.ppCompressed Amiga file archive (PowerPacker)
.pp4Bitmap graphics (Picture Publisher 4)
.ppaAdd-in (MS PowerPoint)
.ppbButton bar for Print Preview (WordPerfect for Win)
.ppdPostScript printer description file (PageMaker)
.ppkArchive (using for many distributives) (PPK)
.pplPolaroidpaletteplus ColorKey device driver (Harvard Graphics 3.0)
.ppmBitmap graphics (PBM Portable Pixel Map)
.ppoPreprocessor output (CA Clipper 5.x)
.pppPublication (PagePlus)
.ppsSlide show (MS PowerPoint)
.ppsStoryboard (Personal Producer)
.pptPresentation (MS PowerPoint)
.prBitmap graphics (Sun raster file)
.pr1Data file (Packrat 4.0)
.pr2Data file (Packrat 4.x)
.pr2Presentation (Aldus Persuasion 2.x)
.pr2Printer driver (dBASE IV)
.pr3Postscript printer driver (dBASE IV)
.pr3Presentation (Aldus Persuasion 3.x)
.prcProcesses (Rational Rose)
.prdPrinter driver (many)
.preBitmap graphics (CMYK image) (Stork format)
.prePresentation (Lotus Freelance)
.preSettings (Programmer's WorkBench - MS C/C++)
.prfBitmap graphics (Pixel Run Format) (Improces - Fastgraph)
.prfData file (CheckIt Pro 1.0)
.prfPrinter driver (dBASE IV)
.prfProfiler output
.prgProgram (Atari)
.prgProgram source (dBASE IV - FoxPro - CA Clipper - dBFast)
.priPrinter definitions (LocoScript)
.prjProject
.prmParameters
.prnPrinter driver (Signature)
.prnText file (Lotus 1-2-3 - Symphony)
.prnUsually printer output file
.proGraphics profile file (DOS)
.proProfile (configuration data)
.proProlog language source code file
.projProject File (Interface Builder) (NeXT)
.prpModel properties (Rational Rose)
.prrThe Perfect Resume data file (Perfect Resume)
.prsPresentation (Harvard Graphics Win)
.prsPrinter Resource eg. fonts (WordPerfect for Win)
.prsProcedure (dBASE IV)
.prtComponent (P-CAD)
.prtPTC Pro/ENGINEER part
.prtPrinter driver (Dr.Halo)
.prvkrPrivate keyring (PGP)
.prxCompiled program (FoxPro)
.psAdobe Postscript document (text/graphics)
.ps2Adobe Level II Postscript document (text/graphics)
.psaArchive (Pretty Simple Archive) (GNU PSA.OUT)
.psdBitmap graphics (Adobe Photoshop format)
.psdDefinition file (Periscope Debugger)
.pseBitmap graphics (IBM printer Page SEgment)
.psegBitmap graphics (IBM printer Page SEgment)
.psfOutline PostScript printer font (ChiWriter)
.psidPostscript image data (text/graphics) (ascii file)
.psmMusic format (Protracker Studio Module) (Protracker - MASI)
.psmSymbol table of IDE (Turbo Pascal)
.psnPresentation file (Sound Script)
.pspProcedure (Prodea Synergy)
.pstPaste buffer (Lahey Fortran)
.pstPersonal Folder File (Microsoft Outlook)
.pstPostbox file (BMail)
.ptGame crack (Player Tools)
.ptKodak Precition Color Management System
.ptSound (Pitch Track)
.pt3Device driver (Harvard Graphics 3.0)
.pt3Template (PageMaker 3)
.pt4Template (PageMaker 4)
.pt5Template (PageMaker 5)
.ptbScript (PubTech BatchWorks)
.ptlPetal (Rational Rose 98)
.ptmMacro (PubTech BatchWorks)
.ptmMusic format
.ptmTemplate (Page Magic 2.0)
.ptrCursor image file (OS/2 PTR file)
.ptrQwk reader pointer file (QMail)
.ptuPerformer Terrain Utilities
.ptxBitmap graphics (Printronix graphics file)
.ptyProperties (Rational Rose 98)
.pubPage template (MS Publisher)
.pubPublic keyring (Pretty Good Privacy)
.pubPublication (PageMaker - Ventura Publisher - 1st Publisher)
.pubkrPublic key ring (PGP)
.putCompressed file archive (PUT)
.putGraphics (WScan)
.puzPuzzle file (BrainsBreaker Puzzle)
.puzzBitmap graphics (8bit) (X11 Puzzle)
.puzzleBitmap graphics (8bit) (X11 Puzzle)
.pvAnalysis data (Phase Vocorder)
.pvdScript (Instalit)
.pvlLibrary (Instalit)
.pvtLocal Fidonet pointlist (FTN software)
.pvuPaleoenvironmental data (PaleoVu)
.pwText document (Professional Write)
.pwdText document (Microsoft Pocket Word)
.pwlPassword List
.pwpText document (Professional WritePlus)
.pwzWizard (MS PowerPoint)
.pxPrimary database index (Paradox)
.pxlPixel data (TeX driver)
.pxlScript (PiXCLscript)
.pxlSpreadsheet (Microsoft Pocket Excel)
.pxpProcess file (3D Studio)
.pxrBitmap graphics (Pixar image) (Photoshop)
.pyPython script file
.pycCompiled Python script file
.pzdDefault settings (Pizazz Plus)
.pziGraphics (Pizazz Plus)
.pzlBitmap graphics (8bit) (Unix Puzzle)
.pzoOverlay (Pizazz Plus)
.pzpPalette (Pizazz Plus)
.pzsSettings (Pizazz Plus)
.pztTransfer file (Pizazz Plus)
.pzxSwap file (Pizazz Plus)

q

.qWin95 fax queue
.q0Bitmap graphics (24bit) (Japanese Q0 image format)
.qadDocument (PF QuickArt)
.qagQuick Access Group (Norton Desktop)
.qapApplication (Omnis Quartz)
.qbeSaved query (Query By Example) (dBASE IV - Quattro Pro)
.qboCompiled query (dBASE IV)
.qbwSpreadsheet (QuickBooks for Windows)
.qcpDigitally encoded voice (Qualcomm QCELP recoder and player)
.qd0Data file - segment 10 (Omnis Quartz)
.qd1Data file - segment 1 (Omnis Quartz)
.qd2Data file - segment 2 (Omnis Quartz)
.qd3Data file - segment 3 (Omnis Quartz)
.qd3QuickDraw 3D Metafile (QuickDraw)
.qd3dQuickDraw 3D Metafile (QuickDraw)
.qd4Data file - segment 4 (Omnis Quartz)
.qd5Data file - segment 5 (Omnis Quartz)
.qd6Data file - segment 6 (Omnis Quartz)
.qd7Data file - segment 7 (Omnis Quartz)
.qd8Data file - segment 8 (Omnis Quartz)
.qd9Data file - segment 9 (Omnis Quartz)
.qdkBackup of startup files created by Optimize (QEMM)
.qdvBitmap graphics (8bit) (Random Dot QDV file)
.qefQuery file (Q+E for MS Excel)
.qfcCompressed file archive
.qfxFax (QuickLink)
.qicBackup set (MS Backup)
.qlbQuick library (BASIC PDS - MS C/C++)
.qlcATM Type 1 fonts script (Adobe Type Manager)
.qlpPrinter driver (QuickLink)
.qm4Options or services file (QMail 4.x Mail Door)
.qprGenerated query program (FoxPro)
.qprPrint queue device driver (OS/2)
.qpxCompiled executable QBE query file (FoxPro)
.qrsEquation Editor support file (WordPerfect for Win)
.qrtBitmap graphics (24bit) (QRT Raytracer)
.qryQuery (dBASE IV)
.qsnQuickScan data (TapCIS)
.qtQuickTime movie (animation)
.qtcQuickTime Conferencing
.qtkBitmap graphics (QuickTake digital camera)
.qtvMovie (QuickTime Virtual Reality)
.qtvrMovie (QuickTime Virtual Reality)
.queQueue object (Scheduler)
.qwkQwk reader message file
.qxdDocument (QuarkXPress)
.qxlElement library (QuarkXPress)
.qxtTemplate (QuarkXPress)

r

.rRatfor file (FORTRAN preprosessor)
.r2dData file (Reflex 2)
.r8Raw graphics (one byte per pixel) plane one (PicLab)
.r8Red channel image data (24bit 3D animation) (Cubicomp PictureMaker)
.r8pPcl 4 bitmap font file (Intellifont)
.raAudio file (RealAudio)
.raData file (Remote Access)
.rad2-op FM music (Reality AdLib Tracker)
.radRadience
.ramRealAudio Metafile (RealAudio)
.rarCompressed file archive (RAR)
.rasBitmap graphics (Sun raster image)
.rastBitmap graphics (Sun raster image)
.ratDatafile (RATS)
.rawBitmap graphics (Raw 24-bit RGB)
.rawSound (Raw sound data) (PCM)
.rayRayshade
.rbfDatafile (Rbase)
.rcConfiguration record (Emacs)
.rcResource script (MS C/C++ - Borland C++ - Resource WorkShop)
.rc2Not editable resources (MS Developer Studio)
.rcgNetscape newsgroup file (netsc.rcg)
.rctResource template (MS Developer Studio)
.rd3Graphics (Ray Dream Designer 3)
.rdefUI resource file (old) (Geoworks)
.rdfCompiled UIC source code (Geoworks UI Compiler)
.rdiDevice-independent bitmap file (RIFF RDIB format)
.rdxDatafile (Reflex)
.recArchivation protocol (ARCSERVE)
.recDatafile (EpiInfo)
.recMacro (Windows Recorder)
.recRecord (Sprint)
.redPath info (Clarion Modula-2)
.refCross-reference
.regRegistration information or key
.remRemarks
.repReply file (Qwk reader)
.repReport file
.reqRequest
.resCompiled resource (MS C/C++ - Borland C++)
.resResign conferences file (XBoard)
.resResource
.revRevision file (Geoworks)
.rexExecutable file (old format) (PharLab)
.rexReport definition (Oracle)
.rexRexx language source code file (Rexx)
.rezResource file
.rfBitmap graphics (Raster file)
.rfmRich music format
.rftDCA/RFT Revisable Format Text file (IBM DisplayWrite 4.0-5.1)
.rgBitmap graphics (1bit B&W 4bit CMYK) (Raster Graphics format)
.rgbBitmap graphics (Raw 24bit Red-Green-Blue) (many)
.rgxSymbol tables etc. info (ReaGeniX code generator)
.rhResource header (Borland C++, Visual C++)
.riData (Lotus 1-2-3)
.ribGraphics (Renderman Interface Bytestream) (3D Reality)
.ricFax (Ricoh)
.rifBitmap graphics (Resource Interchange File Format)
.riffBitmap graphics (Resource Interchange File Format)
.ripGraphics (Remote Access)
.ripProgram crash report (Quincy)
.ripTelegrafx Remote Imaging Protocol (Maximus 3.0)
.rixBitmap graphics (RIX Softworks Paint Tool ColoRIX file)
.rkvCompressed file archive (RKIVE)
.rl4Bitmap graphics
.rl8Bitmap graphics
.rlaBitmap graphics (Wavefront raster image file)
.rlbBitmap graphics (Wavefront raster image file)
.rlbData (Harvard Graphics Win)
.rlcBitmap graphics (Run Length RLC file)
.rldTemporary file (Norton Commander 5.0)
.rleBitmap graphics (Utah Run-Length Encoded image file)
.rlzRealizer source code file (CA-Realizer)
.rmAudio file (RealAudio)
.rmfRich Music Format (Beatnik)
.rmiMidi music (RIFF RMID format)
.rmkMakefile (CA Clipper RMake)
.rmpAudio file (RealAudio)
.rnXpl program (Nota Bene)
.rndRendering Slide (AutoCAD AutoShade)
.rngRinging tone (Nokia Communicator)
.rnkDiap-up shortcut
.rnoRunoff file (VAX)
.roffUnformatted manual page (Roff/nroff/troff/groff)
.rolRoland music file (Adlib)
.romRead Only Memory image (emulators - AONs)
.rot3D image (Rotater)
.rovGame data (Rescure Rover)
.rpbData report file (CP Backup)
.rpdDatabase (RapidFile)
.rpfPattern (AutoCAD)
.rplDocument (Replica)
.rplReply message
.rplText document (Replica)
.rpmPlugin (RealAudio)
.rptReport
.rsData file (Amiga Resource - Reassembler)
.rs_Resource fork of a Macintosh file (Mac-ette)
.rscCompiled resource(s)
.rsgCompiled resource header (EPOC)
.rslResource Library (PC Tools Win)
.rspResponse file
.rsrcResource
.rssResource source file (EPOC)
.rtRich text
.rtfText document (Rich Text Format) (many)
.rtfdRTF-Packet (NeXT)
.rtlBitmap graphics (HP Raster Transfer Language) (HP colour printers)
.rtlRun-Time library (Norton Utilities)
.rtlText file
.rtpSoftware update file (.RTPatch)
.rtsRuntime library (CA-Realizer)
.rtxText document (MIME Richtext format)
.rulRules (Echo-conference)
.runBatch file (PC Tools)
.rusRussian text
.rvwReview
.rwsResource Workshop Symbol file (Borland C++)
.rwxMEME Shape File
.rwxScript (Criterion RenderWare)
.rxdDatafile (Reflex 1)

s

.sAssembly language source code file.s (Unix)
.sForeign assembly source file (Modula-3)
.sMacro source file (MultiEdit)
.sScheme language source code file
.s$$Temporary sort file (Sprint)
.s1kS1000 Simnet Format
.s3iSample file (Digiplayer - ST3)
.s3mMusic (16 channels) (Scream Tracker III)
.safSpatial Archive Interchange Format
.saifSpatial Archive Interchange Format
.salDatafile (SORITEC)
.samText file (Samna - Lotus Ami/Ami Pro)
.sarCompressed file archive (SAR)
.sasSAS source code file (VMS)
.savSaved backup or configuration data
.savSaved game situation (eg. NetHack)
.sbAudio file (signed byte)
.sbdData file (Storyboard Editor)
.sbiSound Blaster Instrument (Creative Labs)
.sbkEmu SoundFont Bank (AWE32 Bank) (Convert (c) Villena)
.sbkToolbook (Asymetrix ToolBook)
.sbllibrary (Stonu Brook Pascal)
.sbpDml program (Superbase 4)
.sbrSupport file (Source Browser)
.sbtNotes related to record (Suberbase 4 Windows)
.scDisplay driver (Framework II)
.scPAL script (Paradox)
.sc2Document (MS Schedule+ 7.x)
.sc3Renamed dBASE III screen mask file (dBASE IV)
.sc3Screen device driver (Harvard Graphics 3.x)
.scaDatafile (SCA)
.scanBitmap graphics (Thunderscan image file)
.sccBitmap graphics (MSX picture)
.scdBitmap graphics (SCODL Scan Conversion Object Description Language)
.scdContacts (MS Schedule+ 7.x)
.scfMultimedia show (ScoreMaker)
.scfShell Command File (Windows Explorer)
.scfSpelling checker configuration (Symphony)
.scgBitmap graphics (ColoRIX)
.schProject schedule (Schedule Publisher - MS Schedule+ 7.x)
.schScheme (P CAD - Orcad)
.sciBitmap graphics (Scitex Continuous Tone (CT2T) image file)
.sciFax (SciFax)
.sciSystem Configuration Information
.scmMovie (Lotus ScreenCam)
.scmScheme language source code file
.scnSCeNe RTrace
.scnScreen dump or file (Kermit)
.scoScore (best results)
.scodlBitmap graphics (Agfa slide file)
.scpBitmap graphics (ColoRIX)
.scpScript (BITCOM)
.scrBitmap graphics (ColoRIX or Sun rasterfile)
.scrDebug source code file (DOS Debug)
.scrFax image
.scrScreen (source) file (Forth)
.scrScreen font (LocoScript)
.scrScreen saver (Windows 3.x)
.scrScreen snapshop (Microsoft Screen Capture format)
.scrScript (1st Reader - Kermit - TeleMate - AutoCAD)
.sctAdditional (FPT) screen description file (FoxPro)
.sctBitmap graphics (Scitex CT bitmap)
.scuBitmap graphics (ColoRIX)
.scxChart (Stanford Chart)
.scxGraphics bitmap (ColoRIX)
.scxMain (DBF) screen description file (FoxPro)
.scySecurity file (ReaGeniX)
.sczData (Wingz)
.sdSound (Entropic Sound Data format)
.sdaSoftware Distribution Network file archive description
.sdfSource definition file (Sourcer)
.sdfSystem Data Format file (fixed lenght ascii text)
.sdiSoftware Distribution Network Info file
.sdkRoland S-550/S-50/W-30 Disk Image
.sdlParsys hardware network description file
.sdlScene Description Language (Alias Wavefront)
.sdlSmartDraw library
.sdmlSpacial Data Modeling Language
.sdnSoftware Distribution Network compressd file archive (pak251.exe)
.sdrMusic (Sounder)
.sdrSmartDraw drawing
.sdsMIDI Sample DUMP Standard File
.sdtSmartDraw template
.sdtsSpatial Data Transfer Standard
.sdwVector graphics (Ami Draw)
.sdxSample DUMP Exchange File
.seaSelf-extracting compressed Macintosh file archive (Compact Pro)
.secDiskreet encrypted file (Diskreet)
.secSecret key ring file (Pretty Good Privacy)
.secSecured animation file (Disney Animation Studio)
.sepPrinter separator page
.seqAnimation file (Atari)
.seqSequential Instruction File (Bubble Chamber)
.sesSession info (Clarion Modula-2)
.setConfiguration (1st Reader)
.setDriver sets created by Install (Symphony)
.setSetup data or info
.sfIRCAM Sound File (CSound package - MixView sound sample editor)
.sfWPS attribute storage (OS/2 WorkPlace Shell)
.sfbHP Soft font
.sffScene File Format
.sfiGraphics (SIS Framegrabber)
.sfiPrinter font (HP LaserJet landscape) (Ventura Publisher)
.sflPCL 4 bitmap font (landscape) (Intellifont - Ventura Publisher)
.sfnFont (SPX)
.sfoBitstream font file - fontware format
.sfpPcl 4 bitmap font (portrait) (Intellifont) (Ventura Publisher)
.sfsPcl 5 scalable font file (Intellifont)
.sftScreen font (ChiWriter)
.sfwGraphics (Seattle Film Works)
.sfxSelf-extracting file archive script (RAR)
.sg1Graphics (Stanford Graphics)
.sgdHelp file (Lahey Blackbeard)
.sgfDocument with graphics (Starwriter)
.sgiBitmap graphics (Silicon Graphics Image)
.sgmIETF SGML document (Standard Generalized Markup Language)
.sgmlIETF SGML document (Standard Generalized Markup Language)
.sgpStatistics (STATGRAPHICS Plus)
.sgtSave/get keyboard macro (Signature)
.sgxHelp file index (Lahey Fortran)
.shShell script (unix) (ascii) (SHAR)
.sh3Presentation (Harvard Graphics 3.0)
.sharShell Archive (Unix) (script)
.shbBackground (CorelShow)
.shbPresentation (Corel Show)
.shbShortcut into a document (Windows 95)
.shdSpool file (Windows95)
.shgBitmap graphics (Segmented HyperGraph)
.shkCompressed Apple II file archive (ShrinkIt)
.shmShell macro (WordPerfect Library)
.shpIcon library (Printmaster)
.shpShape file and source file for text fonts (AutoCAD)
.shrUnix Shell ARchive (ascii) (SHAR)
.shsShell scrap object (Windows 95)
.shtmlHTML with server side includes
.shwPresentation (Harvard Graphics - CorelShow)
.shxShape entities (AutoCAD)
.siGraphics (SoftImage)
.sidC64 tunes and sound effects file (PlaySID)
.sifSetup Installation File
.sifVector data (ISIF format)
.sigCurrent program settings (Signature)
.sigSignature file (ThunderByte AntiVirus - PopMail - PGP)
.sikBackup file (Sicherungskopie) (MS Word)
.simSIMPLE script source (Telix)
.sirBitmap graphics (Solitaire file)
.sisSoftware installation file (Psion)
.sitCompressed Macintosh file archive (UnStuff)
.sixBitmap graphics (DEC LN03+ Sixel file)
.sixelBitmap graphics (DEC LN03+ Sixel file)
.skcardDatafile (Starfish SideKick)
.skrPrivate (secret) keyring (PGP)
.skySYLK Spreadsheet file (Multiplan)
.slS-Lang language source code file
.slbSlide library (AutoCAD)
.slbSymbols library (P-CAD)
.slcCompiled SALT script (Telix)
.sldSlide (AutoCAD)
.sliSlide (MAGICorp Slide Service)
.slkData format (Sylk Symbolic Link format)(Excel - MultiPlan)
.sllSound file
.sltSalt Script Application Language script source (Telix)
.smMaillist (SoftSpoken Mailer)
.smScript (ScriptMaker)
.smSmalltalk language source code file
.smText document (Samna Word)
.smfFax (SMARTFAX)
.smmMacro (Ami Pro)
.smnFont (ParaGraph's WorkScript format)
.smpSound (SaMPleVision)
.smtText file (Smart Ware II)
.snCompressed song file (Sound Club editor)
.sndSound file (Sun/NeXT/Tandy/Apple Macintosh Sound file formats)
.sngSong (midi sound) (Midisoft Studio - Prism)
.snoSnobol4 language source code file
.snpBook-shelf for .BOO (READIBM)
.snpOutput video format from Computer Eyes equipment
.soShared object (Fortran 90)
.solMATRA prelude solids
.solSolution eg. game walkthroughs
.somNetwork serial numbers (Quattro Pro)
.somSort information (Paradox)
.sonSong (SBStudio II)
.souSound data (SBStudio II)
.spCompressed file archive (Splint)
.spcBitmap graphics (Atari compressed Spectrum file)
.spcProgram (MS Multiplan)
.spcTemporary file (WordPerfect for Win)
.spcText to speech
.spdScalable font (Speedo) (Harvard Graphics 3.0)
.spfSlide presentation file (EnerGraphics)
.spgGlossary (Sprint)
.sphSphere
.spiffGraphics (Still Picture Interchange File Format)
.spkCompressed file archive (Spark) (Acorn)
.splCompressed file archive (Splint)
.splCustomized printer driver (Sprint)
.splPersonal spell dictionary (Signature)
.splSample
.splSplash (Macromedia)
.splSpool file (Windows 3.x printing)
.spmData (WordPerfect)
.spotBitmap graphics (SPOT satellite image file)
.sppPrinter file (Sprint)
.sprAnimation (Sizzler)
.sprDocument letter (Sprint)
.sprGenerated executable screen file (FoxPro)
.sprSpreadsheet (Psion Series 3)
.sprSprite (graphics image) (many - Story Board)
.spriteAnimation (Sizzler)
.spsSPSS language source code file (VAX/VMS)
.spsScreen driver (Sprint)
.sptData support file (MITAC disk/system management utility pack)
.sptSpitbol language source code file
.sptSplit (one part of multi-part file)
.sptSupport file (MITAC disk/system management utility pack)
.spuBitmap graphics (Atari compressed Spectrum file)
.spwWorksheet (SigmaPlot)
.spxCompiled executable screen file (FoxPro)
.spxScreensaver (Screen Peace) (Windows)
.sqdSquish message base (Squish)
.sqiSquish message base index (Squish)
.sqlSQL report or query
.sqlSquish message base last read pointers (Squish)
.sqzCompressed file archive (Squeeze)
.srBitmap graphics (Sun Rasterfile)
.srcSource (DataFlex, Multi-Edit)
.srfBitmap graphics (Sun Raster File)
.srpScript (QuickLink)
.ssBitmap graphics (Splash)
.ssScreen saver (DN)
.ssdDatafile (SAS/PC)
.sshSecure Shell document (DataFellows)
.ssiHTML with server side includes
.sspDatafile (SAS Transport)
.ssqODBC script
.sstSatellite image data (AVHRR file) (IDIDAS - SSTMAP - IMGMAP)
.stInstrument library (Scream Tracker)
.stSmalltalk language source code file (Little Smalltalk)
.stStamp (NeoPaint)
.staData file (Statistica)
.staSaved state (Reflection 4.0)
.staStack (Spinmaker Plus)
.stbStub library (Genus GX Kernel)
.stdStandard (something..) (LocoScript)
.stdState Transition Diagram graphics file (Prosa)
.stepISO-10303 STEP product data
.stfCompressed file archive (ShrinkToFit)
.stlStereolithography Interface Format
.stmMusic (4 channels) (Scream Tracker II)
.stmState Transition Diagram model file (Prosa)
.stoPascal stub OBJ file (Genus GX Kernel)
.stpISO-10303 STEP product data
.strGate3 table structure file
.strStructure list object file (dBASE Application Generator)
.stsProject status info (MS C/C++)
.stsSong format (Scream Tracker)
.stwData file (SmartTerm for Windows)
.stxElectronic book (SmarText)
.stxMusic format
.stxTax form (CA-Simply Tax)
.styStyle library or sheet (many text and graphics programs)
.subComponent package (Rational Rose)
.suiSuit library (Simple User Interface Toolkit)
.sumSummary
.sunRaster graphics (Sun Rasterfile)
.suniffBitmap graphics (Sun TAAC Image File Format)
.supBitmap graphics (Startup screen)
.supSupplementary dictionary (WordPerfect for Win)
.svdDocument autosave file (MS Word)
.svfVector graphics (Simple Vector Format) (CAD programs)
.svgGlossary autosave file (MS Word)
.svqMusic file
.svrVirtual world (compressed) (WWW)
.svsStyle sheet autosave file (MS Word)
.svxSound (Amiga 8SVX format)
.swAudio file (signed word)
.swaMusic (MPEG-1 Layer III with special header) (Macromedia Shockwave)
.swfFlash (Macromedia)
.swgSWAG Pascal Snippets file (SWAG Reader)
.swpDocument backup (Sprint)
.swpSwap file
.sxpProcess file (3D Studio)
.sy1Smartpix symbol library (Ami Pro)
.sy3Symbol file (Harvard Graphics 3.x)
.sydBackup (QEMM - Sysedit)
.sykSYLK spreadsheet format (Excel)
.sylkSYLK spreadsheet format (Excel)
.symComponent symbols (P-CAD)
.symGraphics symbols (Harvard Graphics 2.0 - MS Windows SDK)
.symPrecompiled headers (Borland C++)
.symProgram symbol table (many compilers and linkers)
.synBitmap graphics (SDSC Synu image file)
.synSynonym file (MS Word 5)
.synuBitmap graphics (SDSC Synu image file)
.sysDatafile (SYGRAPH - SYSTAT - SPSS/PC)
.sysSystem file - device driver or hardware configuration info (DOS)
.sywGraphics symbols (Harvard Graphics Win)
.sywYamaha SY-85/SY-99 Wave File

t

.tTads source
.tTape Archive without compression (tar)
.tTester symbol table (ReaGeniX code generator)
.tUnformatted manual page (Roff/nroff/troff/groff)
.t44Temporary file for Sort or Index (dBASE IV)
.t64Commodore 64 emulator tape file (C64S emulator)
.t65Template (PageMaker)
.taacBitmap graphics (Sun TAAC Image File Format)
.tabColour lookup table (CMYK image) (Stork format)
.tagQuery tag name (DataFlex)
.tahHelp file (Turbo Assembler)
.talText illustration (TypeAlign)
.talkText to speech
.tapTape file (ZX Spectrum emulator by g.a.lunter)
.tarCompressed file archive (tar)
.targaBitmap graphics (Truevision Targa format)
.tazCompressed file.tar.Z archive (ascii) (tar and compress)
.tb1Font file (Borland Turbo C)
.tb2Font file (Borland Turbo C)
.tbfFax (Imavox TurboFax)
.tbkMemo backup (dBASE IV - FoxPro)
.tbkToolbook (Asymetrix ToolBook)
.tblDynamic Link library
.tblTable
.tbrCustom toolbar (Norton Desktop)
.tbsText elements (Textbausteine) (German MS Word)
.tbxTable (Project Scheduler 4)
.tcConfiguration (Turbo C - Borland C++)
.tcTermcap
.tchHelp file (Turbo C - Borland C++)
.tclTcl (Tool Command Language) script source code
.tcoT9000 object modules
.tcwDrawing (TurboCAD for Windows)
.tdConfiguration file (Turbo Debugger for DOS)
.td0Disk image (compressed diskette in a file) (Teledisk)
.td2Configuration file (Turbo Debugger for Win32)
.tdbDatabase (TACT)
.tdddImagine Object File Format
.tdfFont (TheDraw)
.tdfTypeface definition file (Speedo)
.tdhHelp file (Turbo Debugger)
.tdiAnimation (TDI image file)
.tdkKeystroke recording file (Turbo Debugger)
.tdrContens of Arvid tape
.tdsSymbol table (Turbo Debugger)
.tdwConfiguration file (Turbo Debugger for Windows)
.tdwDebugger symbol table (Borland C++ Builder)
.tefFax (Relisys TEFAX)
.telHost file (Telnet)
.temInput template (IconAuthor)
.temTurbo Editor Macro Language script (Borland C++)
.tetTetris results (DN)
.texDatasheet (Idealist)
.texText document (TeX Device Independent File Format) (Scientific Word)
.texTexture file (possible graphics)
.textText file
.tfConfiguration (Turbo Profiler)
.tfMUD client macro (TinyFugue)
.tfaArea file (Turbo Profiler)
.tfcCatalogue file (Tobi's Floppy Cataloguer)
.tfhHelp file (Turbo Profiler)
.tfmTagged font metric file (Intellifont - TeX)
.tfsStatistical information (Turbo Profiler)
.tgTechnical Guidance (NRC Inspection Manual)
.tg1Project file (On Target)
.tgaBitmap graphics (Truevision Targa format)
.tgzCompressed file archive.tar.gz (tar and GNUzip)
.themeDesktop theme (Windows 95)
.thmBitmap graphics (Picture Publisher - PhotoMagic Thumbnail)
.thnThumbnail (Graphics Workshop for Windows)
.thorDatabase description (THOR database)
.thsThesaurus dictionary (WordPerfect for Win)
.tiTemporary Instruction (NRC Inspection Manual)
.ticFTN special file with assotiated file description (ALLFIX)
.tifBitmap graphics (Tagged Image File Format) (PageMaker - CorelDraw)
.tiffBitmap graphics (Tagged Image File Format) (PageMaker - CorelDraw)
.tigTiger file (US government distributed maps)
.tilFuzzy logic knowledge base (Togai InfraLogic Fuzzy-C Compiler)
.tisTile set (MahJongg 3.0)
.tjlBackup file (VAXTPU editor)
.tlbOLE Type library (Visual C++)
.tlbReference table (Bubble Chamber)
.tlbText library (VAX)
.tlcCompiled Tool Command Language source code (Geoworks Swat)
.tldDisk Image (Teledisk)
.tlpProject (TimeLine)
.tmBitmap graphics (EOSAT's Landsat Thematic Mapper data file)
.tmfTagged Font Metric file (WordPerfect for Win)
.tmoZtg global optimizer default output file (Zortech C++)
.tmpTemporary file
.tmsScript (Telemate)
.tmsTeleMate compiled script (TeleMate)
.tnyBitmap graphics (Atari TINY Bitmap)
.tocTable Of Contents (index file)
.tokExternal tokens (Borland C++ 4.x)
.tosSelf-extracting file archive (Atari ST)
.tpConfiguration (Turbo Pascal)
.tpSession-state file (Turbo Profiler)
.tp3Template (Harvard Graphics 3.0)
.tpbDownloadable PCL Soft font file backup (HiJaak)
.tpfDownloadable PCL Soft font file (HiJaak)
.tphHelp file (Turbo Pascal)
.tplResident units library (Turbo Pascal)
.tplTemplate (Harvard Graphics - GoldEd -ITrack)
.tppProtected Mode Units (Borland Pascal 7.0)
.tpuCommand file (VAXTPU editor)
.tpuPascal Unit (DOS library) (Borland Pascal)
.tpwPascal Unit (Windows library) (Borland Pascal)
.tpwSession-state file (Turbo Profiler for Windows)
.tpzCompressed file archive.tar.gz (tar and GNUzip)
.trSession-state settings (Turbo Debugger for DOS)
.trUnformatted manual page (Roff/nroff/troff/groff)
.tr2Session-state settings (Turbo Debugger for Win32)
.trcDebug support file (Power CTrace)
.treDirectory tree file (PC-Tools)
.trifBitmap graphics (Tiled Raster Interchange Format)
.trkTrack (i.e. video sequence) used by many games
.trmTerminal settings (Windows 3.x)
.trnTranslation support file (Quattro - Clarion)
.trsExecutable file (Micrografx)
.truTrue Basic language source code file
.trwSession-state settings (Turbo Debugger for Windows)
.tsmManual (Turbo Assembler for OS/2)
.tsqODBC script
.tstPrinter test file (WordPerfect for Win)
.tsvTab Separated Values
.ttfTruetype Font (font file)
.tudDocument (The Ultimate Draw)
.tutTutorial
.tvTable view settings (Paradox)
.tv1Overflow file above insert point in Doc 1 (WordPerfect for Win)
.tv2Overflow file above insert point in Doc 2 (WordPerfect for Win)
.tv3Overflow file above insert point in Doc 3 (WordPerfect for Win)
.tv4Overflow file above insert point in Doc 4 (WordPerfect for Win)
.tv5Overflow file above insert point in Doc 5 (WordPerfect for Win)
.tv6Overflow file above insert point in Doc 6 (WordPerfect for Win)
.tv7Overflow file above insert point in Doc 7 (WordPerfect for Win)
.tv8Overflow file above insert point in Doc 8 (WordPerfect for Win)
.tv9Overflow file above insert point in Doc 9 (WordPerfect for Win)
.tvfTable view settings (dBASE)
.twfData (TabWorks)
.twwTagwrite Template
.tx88-bit ASCII text
.txfCompressed file archive.tar.f (tar and Freeze)
.txiSupport file (TeX)
.txtPlain text (ASCII or ISO Latin 1 format)
.txwYamaha TX-16W Wave File (Convert (c) Villena)
.tymTime Stamp (PageMaker 4)
.tzCompressed file archive.tar.Z (tar and compress)
.tzbCompressed file archive.tar.Z.btoa (tar - compress - btoa)

u

.uBitmap graphics (subsampled raw YUV file)
.u4aUnInstaller archive
.u8Sample
.ubMusic file (unsigned byte)
.uc2Compressed file archive (UltraCompressor II)
.ucdUse case diagram (Prosa/OM)
.ucnNew compressed file archive (UltraCompressor II)
.udfFilter (Photostyler)
.udfUniqueness Database File (Windows NT)
.ue2Encrypted file archive (UltraCompressor II)
.ufaCompressed file archive (UFA)
.ufoUlead File for Objects (Ulead PhotoImpact)
.uhsUniversal Hint System (binary file)
.uiEspire language source code file (Geoworks UI Compiler)
.uiUser interface (Sprint)
.uifLong prompts for windows (WordPerfect for Win)
.uihEspire header file (Geoworks UI Compiler)
.uilBitmap graphics (Motif UIL icon file)
.ulMusic file (Ulaw)
.uldUploaded file information (Procomm Plus)
.ultMusic (UltraTracker)
.umbBackup file (MemMaker)
.undUndefined symbols (A86)
.uniDatafile (Forecast Pro)
.uniMusic (UniMOD - MikMOD)
.unvSDRC I-DEAS file
.unxText file containing UNIX specific info
.updUpdate info
.upfBitmap graphics (Universal Picture Format)
.upoCompiled update data (dBASE)
.uriList of Uniform Resource Identifiers (WWW)
.urisList of Uniform Resource Identifiers (WWW)
.urlInternet shortcut (Universal Resource Locator)
.urtBitmap graphics (Utah Run-Length Encoded image file)
.useLog file
.uspPrinter font with US Ascii extended character set (PageMaker)
.usrUser database (Procomm Plus - Turbo C++ tour)
.ustarCompressed file archive (POSIX tar)
.uuEncoded file archive (ascii) (uudecode - uuencode)
.uudEncoded file archive (ascii) (uuencode)
.uueEncoded file archive (ascii) (uuencode)
.uwMusic file (unsigned word)
.uwfMusic file (UltraTracker WaveSample)

v

.vBitmap graphics (subsampled raw YUV file)
.vConsistency check support file (ReaGeniX code generator)
.vMain input file for an image (Vivid 2.0)
.valValidity checks and referential integrity (Paradox for Windows)
.valValues list object file (dBASE Application Generator)
.vanAnimation (VistaPro)
.vapValue Added Process (NetWare 2.xx)
.varVariable file (IconAuthor)
.vbpVisual Basic Project
.vbrVisual Basic Custom Control file (Visual Basic)
.vbxVisual Basic eXtension (custom control)
.vbzVisual Basic Setup Wizard Template (Setup Wizard)
.vcInclude file with color definitions (Vivid 2.0)
.vcSpreadsheet (VisiCalc)
.vcaVisual Clip Art
.vcfVevi Configuration File (WorldToolKit objects)
.vcrVCR driver (Arvid)
.vcsCalendar data (Netscape Calendar)
.vcwVisual workbench information (MS Visual C++)
.vcxSpreadsheet (VisiCalc Advanced)
.vdaBitmap graphics (Truevision Targa format)
.vdaGraphics (VDA-FS surface data)
.vdiBitmap graphics (Digital Research GEM VDI file)
.vdoVideo image (Story Board)
.vdrDrawing (ComputerEasy Draw)
.vehVector data (SPANS VEH/VEC format)
.vewGroupWise for Windows
.vewView file (Clipper 5 - Lotus Approach)
.vfaDatabase file (FontLab)
.vffBitmap graphics (DESR VFF Greyscale Image)
.vffBitmap graphics (Sun TAAC Image File Format)
.vfmVentura Font Metrics file (Ventura Publisher)
.vfmVoting Form (Voter)
.vfnVoting Form for Customers (Voter)
.vgaBitmap graphics (OS/2 bitmap)
.vgaVga display font
.vgdVga display driver (Generic CADD)
.vgrGraphics (Ventura Publisher)
.viBitmap graphics (Jovian Logic VI video capture board)
.viScript (Watcom Vi editor)
.vicGraphics (VICAR - Video Image Communication and Retrieval)
.vicarGraphics (VICAR - Video Image Communication and Retrieval)
.vidBitmap graphics (YUV12C M-Motion Frame Buffer file)
.vidScreen device driver (MSDOS - Word)
.vifBitmap graphics (1bit CCITT Group 4) (Verity Image Format) (Topic)
.vifBitmap graphics (Khoros Visualization Image File Format)
.viffBitmap graphics (Khoros Visualization Image File Format)
.vikGraphics (Viking)
.virVirus or infected file
.visGraphics (Vista)
.vitBitmap graphics (VITec file)
.vlbCorel Ventura Library
.vlmVirtual Loadable Module (Netware)
.vmVirtual Memory file (or localization file) (Geoworks)
.vmcVirtual memory configuration (DOS/4GW PM 32X DOS Extender)
.vmfFont characteristics (Ventura Publisher)
.vmsText file containing VMS specific info
.voInclude file with object definition (Vivid 2.0)
.vocSound (Creative Lab's Sound File) (PlayVoc)
.vofObject folder (VZ Programmer)
.vortBitmap graphics (Very Ordinary Rendering Toolkit)
.vpPublication (Ventura Publisher)
.vpVideo posting (3D Studio)
.vpfVector Product Format
.vpgGraphics (VPGraphics)
.vphVirtual Pascal Help (VP/OS2)
.vpiVirtual Pascal Unit (VP/OS2)
.vprResource (Visual Prolog)
.vrmOverlay file (QuattroPro)
.vrmVirtual Reality Modeling Language (WWW)
.vrmVisual Rexx language source code file (Watcom VRexx)
.vrmlVirtual Reality Modeling Language (WWW)
.vrpProject (WATCOM VXRexx)
.vrsVideo Resource (device driver) (WordPerfect)
.vrtVirtual world (WWW)
.vsInclude file with surface definition (Vivid 2.0)
.vsdDrawing (Visio)
.vsmSimulation model (VisSim)
.vspSprite (SPX)
.vssSmartshapes file (Visio)
.vstBitmap graphics (Truevision Vista)
.vstTemplate (Visio)
.vswData (Visio Workspace)
.vueAnimation (3D Studio)
.vueView (dBASE IV - FoxPro)
.vwText file (Volkswriter)
.vwrFile viewer file (PC Tools)
.vxdVirtual device driver (MS Windows)

w

.wWord chart file (APPLAUSE)
.w30Printer font (AST TurboLaser) (Ventura Publisher)
.w31Startup file (Windows 3.1)
.w44Temporary file for Sort or Index (dBASE)
.w51Document (WordPerfect 5.1)
.w60Document (WordPerfect 6.0)
.w61Document (WordPerfect 6.1)
.w95Microsoft Windows95 related file
.wadWar Allocation Daemon (Doom - Doom2)
.wasScript file (source code) (ProComm)
.wavSound (RIFF WAVE waveform audio format) (Media Player)
.waxCompiled script (ProComm)
.wb1Notebook (Quattro Pro)
.wb2Spreadsheet (Quattro Pro)
.wbfWindows Batch File (Catch)
.wbkAuto-backup (MS Word)
.wbkDocument/workbook (WordPerfect for Win)
.wblUpload file (Argo WebLoad II)
.wbtBatch file (WilsonWare WinBatch)
.wcdMacro token list (WordPerfect for Win)
.wchMacro facility file (WordPerfect)
.wcmData transmission file (MS Works)
.wcmMacro (WordPerfect for Win)
.wcpProduct information description (WordPerfect for Win)
.wdData file (InfoSelect)
.wdbDatabase (MS Works)
.webWeb document (Corel Xara)
.webooglWeb Object Oriented Graphics Library
.wfmForm object (dBASE Form Designer)
.wfnWindows 3.0 font file (CorelDraw)
.wfxData file (Winfax)
.wg1Worksheet (Lotus 1-2-3/G)
.wg2Worksheet (Lotus 1-2-3 for OS/2)
.wgpGame data (Wild Board Games)
.whipBitmap graphics (WHIP file)
.wicGarbage, fake compressed data. Your files are in WINFILE.DLL
.widWidth table (Ventura Publisher)
.wilData (WinImage)
.winWindow file (FoxPro - dBASE)
.winsMakefile for WINS platform (EPOC)
.wizPage wizard (MS Publisher - MS Word)
.wizWizard (MS Word)
.wk1Spreadsheet (Lotus 123 version 2.x - Symphony 1.1+)
.wk3Spreadsheet (Lotus 123 version 3.x)
.wk4Spreadsheet (Lotus 123 version 3.4)
.wkbDocument (WordPerfect for Win)
.wkeSpreadsheet (Lotus 123 educational version)
.wkiSpreadsheet format (Lotus 123 2.x)
.wkqSpreadsheet (Quattro)
.wksDocument (Microsoft Works)
.wksSpreadsheet (Lotus 123 version 1A - Symphony 1.0 - MS Works)
.wksWorkspace (Xlisp)
.wkzSpreadsheet (Wingz)
.wlfUpload file (Argo WebLoad I)
.wlkGraphics (Virtus Walkthrough)
.wllAdd-in (MS Word)
.wmcBackup of startup files (MathCad)
.wmcMacro file (WordPerfect for Win)
.wmcText file (WordMARC)
.wmfVector graphics (Windows MetaFile format)
.wmlWireless Markup Language document (WAP)
.wmpGraphics (Windows Magic Icon Palette)
.wnText document (NeXT WriteNow)
.wnfOutline font description (CorelDraw native format)
.woaSwap file (Windows 3.x)
.wobObject file (RIO Designer Pro)
.wocOrganization (Windows OrgChart)
.wowMusic (8 channels) (Grave Mod Player)
.wpText document (WordPerfect 4.2)
.wp4text document (WordPerfect 4.x)
.wp5Text document (WordPerfect 5.x)
.wp6Text document (WordPerfect 6.x)
.wpdText document (WordPerfect 6.0 - PFS:WindowWorks)
.wpdWindows printer driver
.wpfFax (WorldPort)
.wpfForm (WordPerfect)
.wpgBitmap graphics (WordPerfect Graphics Format)
.wpgVector graphics (WordPerfect Graphics Format)
.wpjProject (Watcom C/C++)
.wpkMacros (WordPerfect for Win)
.wpmMacros (WordPerfect)
.wpmText document (WordPerfect for Mac)
.wpsText document (MS Works)
.wptTemplate (WordPerfect)
.wpwDocument (Novel PerfectWorks)
.wq!Compressed spreadsheet (Quattro Pro)
.wq1Spreadsheet (Quattro Pro DOS)
.wq2Spreadsheet (Quattro Pro 5 DOS)
.wr1Spreadsheet (Symphony 1.1 - 1.2 - 2)
.wrdTemplate (Charisma)
.wrdText document (Psion Series 3)
.wriText document (Windows Write)
.wrkSpreadsheet (Symphony 1.0)
.wrl3D virtual reality object (VRML worlds) (Cosmo Player)
.wrpCompressed Amiga file archive (Warp)
.wrsWindows Resource eg. printer driver (WordPerfect for Win)
.wrzVRML worlds (Cosmo Player)
.wsAPL Worksheet
.wsText document (WordStar 5.0-6.0)
.ws1Text document (WordStar for Windows 1)
.ws2Text document (WordStar 2000 - WordStar for Windows 2)
.ws3Text document (WordStar for Windows 3)
.ws4Text document (WordStar for Windows 4)
.ws5Text document (WordStar for Windows 5)
.ws6Text document (WordStar for Windows 6)
.ws7Text document (WordStar for Windows 7)
.wscScene file (RIO Designer Pro)
.wsdDocument (WordStar)
.wspWorkspace (Fortran PowerStation)
.wsqWavelet-packet Scalar Quantization Format
.wsrcx-wais source
.wstText document (WordStar)
.wtkURL address of person to talk to (WinTalk)
.wtxText document
.wveSound (8kHz) (Psion Series 3 palmtop)
.wvlBitmap graphics (Wavelet Compressed Bitmap)
.wwbButton bar for document window (WordPerfect for Win)
.wwkKeyboard layout (WordPerfect for Win)
.wxpDocument (EXP for Windows)

x

.xArchive (X1)
.xBitmap graphics (24bit) (AVS X image file)
.xLex language source code file
.xSelf-extracting archive (Alysis SuperDisk)
.xX-file animation (Direct3D) (DeepV2)
.x01Secondary index (Paradox)
.x02Secondary index (Paradox)
.x03Secondary index (Paradox)
.x04Secondary index (Paradox)
.x05Secondary index (Paradox)
.x06Secondary index (Paradox)
.x07Secondary index (Paradox)
.x08Secondary index (Paradox)
.x09Secondary index (Paradox)
.x10Bitmap graphics (X Window dump)
.x11Bitmap graphics (X Window dump)
.x3dx3d and xdart Formats
.xarDrawing (Corel Xara)
.xbmBitmap graphics (1bit text) (X Window BitMap)
.xcBitmap graphics (Constant image of X server screen)
.xckExtended crack file (usually text)
.xclScript file (Xtree for Win)
.xdfExtended disk format image (OS/2 xdfcopy.exe)
.xfnPrinter font (Xerox 4045) (Ventura Publisher)
.xfrBitmap editor font file (Ventura Publisher)
.xft24 pin printer font (ChiWriter)
.xglGraphics language file (MegaBitz)
.xgzVector drawing (MegaBitz)
.xiInstrument file (Fastracker 2.0)
.xifGraphics (eXtended Image File Format)
.ximBitmap graphics (X11 Xim Toolkit file)
.xlSpreadsheet (Excel)
.xlaAdd-in macro sheet (MS Excel)
.xlaXlib Archive (Xlib graphics library)
.xlbWorksheet (MS Excel)
.xlcChart (MS Excel)
.xldDialog sheet (MS Excel)
.xlkBackup (MS Excel)
.xllXLL add-in (MS Excel)
.xlmMacro (MS Excel)
.xlsSpreadsheet (MS Excel)
.xltTemplate (MS Excel)
.xltTranslation table (Lotus 1-2-3 - Symphony - Procomm Plus)
.xlvVBA Module (MS Excel)
.xlwWorkspace (MS Excel)
.xmMusic (FastTracker - Cubic Player)
.xmiCompressed eXtended MIdi music
.xmlXML document (Extensible Markup Language)
.xmzXGL movie (MegaView)
.xnfStandard Network File form
.xnkShortcut (MS Exchange)
.xofRenderMorphics
.xosBitmap graphics (Xaos Tools image file)
.xpmBitmap graphics (8bit text) (X11 pixmap file)
.xqtExecutable file (Waffle)
.xqtMacro sheet (SuperCalc)
.xr1Game data (Epic MegaGames Xargon)
.xrefCross reference (AIX as)
.xrfCross-reference file
.xscXML schema
.xtMusic track (FastTracker)
.xtbExternal translation table (LocoScript)
.xtpOverlay (XTreeGold)
.xvBitmap graphics (Khoros Visualization Image File Format)
.xwdBitmap graphics (X Window Dump screen window image format)
.xwkKeyboard mapping (Crosstalk)
.xwpSession (Crosstalk)
.xwpText document (Xerox Writer)
.xxEncoded file archive (ascii) (xxdecode - xxencode)
.xxeEncoded file archive (ascii) (xxencode)
.xyText document (XY Write)
.xy3Text document (XYWrite III)
.xy4Text document (XYWrite IV)
.xypText document (XYWrite III Plus)
.xywText document (XYWrite for Windows 4.0)

y

.yBitmap graphics (subsampled raw YUV file)
.yCompressed Amiga file archive (Yabba)
.yGrammar file (Yacc)
.y01Secondary index (Paradox)
.y02Secondary index (Paradox)
.y03Secondary index (Paradox)
.y04Secondary index (Paradox)
.y05Secondary index (Paradox)
.y06Secondary index (Paradox)
.y07Secondary index (Paradox)
.y08Secondary index (Paradox)
.y09Secondary index (Paradox)
.yalClipart library (Arts & Letters)
.ybkYearbook (Microsoft Encarta)
.ybmBitmap graphics (Face file)
.ycArchive (YACC)
.yifGraphics (color with lookup table)
.yuvBitmap graphics (Abekas YUV file or CCIR 601 1:1:1 file)
.yuv3Bitmap graphics (CCIR 601 2:1:1 files)
.yzCompressed file archive (YAC)

z

.zCompressed file archive.z (binary) (Unix SysV pack)
.z3Infocom game module
.z80Snapshot (ZX Spectrum emulator by g.a.lunter)
.zadDigitized voice file (ZFax)
.zdgCompressed ZiffNet text document (Zview)
.zeissBitmap graphics (Zeiss CSLM file)
.zerData file (Zerberus)
.zfdZeroadic functions (ABC programming language)
.zgmGraphics (Zenographics)
.zincBitmap graphics (Zinc Interface Library icon file)
.zipCompressed file archive (InfoZIP - PKZip - WinZip)
.zomCompressed Amiga file archive (Zoom)
.zooCompressed file archive (Zoo)
.zpdZeroadic predicates (ABC programming language)
.zrpRapid simulation package (Rapid)
.ztsScript (Z-Term)
.zvdZyxel Voicefile (Z-Fax)
.zwChinese text
.zzeEncoded file archive (ascii)

~

.~$~Temporary file (1st Reader)
.~apOld AppExpert project database (Borland C++ 4.x)
.~deProject backup (Borland C++ 4.x)
.~mnMenu backup (Norton Commander)

.$Temporary file (1st Reader)

Filex home: http://www.crosswinds.net/san-marino/~jom/filex/
"Filename Extensions" database copyright (c) by Jouni Miettunen. All Rights Reserved.