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EXT TYPE CATEGORY APPLICATION OR DESCRIPTION .$$$ ???? Special Temporary file .••_ ???? Special Windows installation, often compressed (• = any character) .1st TEXT Word processing Text Readme .3df 3DMF 3D Image Classic Mac OS QuickDraw 3D metafile .3dmf 3DMF 3D Image Classic Mac OS QuickDraw 3D metafile .3ds ???? 3D Image 3D Studio .3g2 ???? Special 3G Phone Protocol 2 (3GPP2) for audio, and text to phones .3gp ???? Special 3G Phone Protocol (3GPP) for audio, video and text to phones .509 cert Security Digital certificate .669 6669 Music Composer 669/Unis Composer MOD file .8bf 8BFM Graphic Photoshop plug-in .8med STrk Music OctaMed .8sv 8SVX Sound Amiga Interchange (IFF) 8-bit mono sound .8svc 8SVX Sound Amiga (IFF) 8-bit mono sound .8svx 8SVX Sound Amiga Interchange File Format (IFF) 8-bit mono sound .a TEXT Programming Assembly source .a3d AMAS 3D Image Amapi 3D .aa ???? Sound Audible Audio (AA) .aam ???? Special Authorware .aas ???? Special Authorware .abc TEXT Music Virtual Composer .abs TEXT Word processing Abstract from text document .ac3 ???? Sound AC-3 audio, used on DVD-Video .acd ???? Sound Sonic Foundry ACID sound sample .acgi APPL AppleScript Common Gateway Interface (CGI) file .adpcm APCM Sound Intel Adaptive Differential Pulse Code Modulation (ADPCM) .aex eFKT Special Adobe After Effects plug-in .afm TEXT Font PostScript Adobe Font Metrics (AFM) .ai EPSF Graphic or DTP simplified form of EPSF .ai EPSF Movie Adobe Illustrator animated sequence, simplified EPSF .aif AIFF Sound Audio Interchange File Format (AIFF) .aifc AIFC Sound Compressed AIFF (AIFF-C) .aifc AIFF Sound Compressed AIFF (AIFF-C) .aiff AIFF Sound Audio Interchange File Format (AIFF) .aip ARPI Graphic Adobe Illustrator Plug-in .al ALAW Sound A-law .als ???? Sound Ableton Live .amc ???? 3D Image Acclaim motion capture .amf ???? Music DMP Advanced MOD file . ANli Movie Atari Animated NeoChrome . ANli Movie Atari Animated NeoChrome .apd TEXT Desktop publishing Aldus printer description .app Folder Mac OS folder used as Application Program Package (APP) .app APPL Special Mac OS application . mArc Archive ARC compressed file, usually produced on a PC . BINA Archive ARJ compressed .arr ARR Graphic Amber ARR .art ART Graphic First Publisher .as ApSi Internet AppleSingle binary file containing one Classic Mac OS file .asc TEXT Word processing ASCII text . TEXT Word processing ASCII text .asf ASF_ Movie Windows Media Active Streaming Format (ASF) .asm TEXT Programming Assembly source .asp TEXT Internet Active (ASP) file for server-side code .asf TEXT Movie Active Streaming Format (ASF) .asf ???? 3D Image Acclaim skeleton file .asx ASX_ Movie Windows Media format .au ULAW Sound µ-law format (Sun Audio) .au.gsm GSM Sound Coded speech for GSM mobile phone or Internet .avi VfW Movie (VfW) Audio Video Interleave (AVI) .avr ???? Sound Audio Visual Research (AVR) file .bak ???? Word processing Backup file, WordStar and others .bar BARF Archive binary archive (BAR), obsolete .bas TEXT Programming BASIC source code .bat TEXT Special MS-DOS batch (BAT) for PC .bdf TEXT Font Unix font .bga BMPf Graphic PC OS/2 bitmap .bib TEXT Word processing BibTex bibliography .bin MACB Internet MacBinary/BinHex 5, containing Classic Mac OS file .binary BINA Special Untyped binary data .bld BLD Graphic BLD format .bmap FFIL Font Classic Mac OS suitcase: bitmap screen font for PostScript font .bmp BMP Graphic Windows bitmap (BMP) .bmp BMPf Graphic Windows bitmap (BMP) .bmp BMPp Graphic Windows bitmap (BMP) .boo TEXT Word processing BOO encoded text .bsc ???? Programming Microsoft Source Browser database .bst TEXT Word processing BibTex style (BST) .bub BUB 3D Image IpixViewer Bubble (BUB) .bup ???? Special BUP backup for IFO file, used on DVD-Video .bum .bMp Graphic BUM bitmap format .bvh ???? 3D Image Bio Vision Hierarchy .bw .SGI Graphic SGI .bz Bzp2 Archive .bz2 Bzp2 Archive BZip2 .c TEXT Graphic C source image dump .c TEXT Programming C source .ca cert Security Digital certificate .cab ???? Archive (Windows installations) .cdr CD40 Graphic CorelDraw graphic .cel CEL Graphic KISS .cer cert Security Digital certificate .cfm TEXT Internet Cold Fusion Markup Language (CFML) file .cfml TEXT Internet Cold Fusion Markup Language (CFML) file .chm ???? Special LZW Compressed HTML (help file or eBook) .cgi APPL Internet Common Gateway Interface (CGI) file .cgm CGMm Graphic Harvard Metafile (CGM) .cicn cicn Graphic Mac OS cicn Resource .cin ???? 3D Image .class TEXT Programming Java class .clip clpp Graphic Mac OS clipping .clp CLPp Special Windows clipboard .clt rawp Special Colour lookup table .cmd TEXT Special PC OS/2 batch file .cmu TEXT Graphic Unix CMU Window Manager dump .com PCFA Special MS-DOS executable binary file .cp TEXT Programming C++ source .cpp TEXT Programming C++ source . CPT8 Graphic Corel PhotoPaint .cpt PACT Archive .crt cert Security Digital certificate . TEXT Internet HTML Cascading Style Sheet (CSS) .csv TEXT Spreadsheet/database Comma Separated Values (CSV) .ct ..CT Graphic Scitex Continuous Tone (CT) .cur CUR Graphic Windows Cursor .cut Halo Graphic Dr Halo .cvs drw2 Graphic Canvas .cwd CWDB Database AppleWorks or ClarisWorks .cwg CWGR Graphic AppleWorks or ClarisWorks .cwk CWWP Word processing AppleWorks or ClarisWorks .cwp CWWP Word processing AppleWorks or ClarisWorks .cwpb ???? Word processing CopyWrite project .cws CWSS Spreadsheet AppleWorks or ClarisWorks .dat ???? Special Data (various formats) .db TEXT Database .dbf F+DB Database DBase II or IIT .dcm ???? Movie Digital Imaging and Communications in Medicine (DICOM) .dcr FGDM Movie Director Shockwave .dcx DCXx Graphic PCX (ZSoft or PC Paintbrush) .dd DD01 Archive DiskDoubler compressed file .dewf DEWF Sound Sound Session Instrument file .dfont Font Mac OS X data-fork font .dic ???? Special Dictionary file .dif dvc! Movie Digital Video (DV) file .dif TEXT Word processing Document Interchange File (DIF): unformatted text .dir FGDM Movie Director Shockwave .diz TEXT Word processing BBS description . ???? Image DjVu image or multi-page document .dl DL Movie DL animation .dll PCFL Special Windows Dynamically Linked Library (DLL) .dll shlb Special Mac OS Dynamically Linked Library (DLL) .dmg devi Archive Mac OS X device (disk) image .dmg devr Archive Mac OS X device (disk) image with raw data .doc TEXT Word processing ASCII text .doc WDBN Word processing Microsoft Word .doc W6BN Word processing Microsoft Word 6 .doc W8BN Word processing Microsoft Word 8 .doo ???? Graphic Atari DR Doodle .dos TEXT Word processing ASCII text .dot sDBN Word processing Microsoft Word template/stationery .dox ???? Word processing Multimate 4 .drv TEXT Special file .dsm ???? Music Dynamic Studio MOD file .dtd TEXT Internet Type definition file .dts ???? Sound Digital Theater System (DTS) audio, as used on DVD-Video .dv dvc! Movie Digital Video (DV) file .dvi ODVI DTP TeX DeVice Independent (DVI) file .dwg ???? 3D Image AutoCAD Drawing .dwt ???? Internet Dreamweaver Template .dxf ???? 3D Image AutoCAD Drawing Exchange File .dxr FGDM Movie Director Shockwave .epp ???? 3D Image Extended (EPix) Panorama file .eps EPSF Graphic or DTP Encapsulated PostScript File (EPSF) .eps EPSF Movie EPSF containing animated sequence .epsf EPSF Graphic or DTP Encapsulated PostScript File (EPSF) .epsf EPSF Movie EPSF containing animated sequence .epx ???? 3D Image Extended Pixel (EPix) file .etd ???? Special Adobe eBook Electronic Transfer Document (ETD) .etx TEXT Word processing SEText or Easy View text chapter .evy ENVD Special Envoy Viewer .exe PCFA Special MS-DOS Executable binary file (EXE) for Soft PC .fam FFIL Font Mac OS font suitcase (font family) .far ???? Music Farandole Composer MOD file .faq TEXT Word processing Frequently Asked Questions (FAQ) .fax TIFF Graphic Tagged Image Format File (TIFF) for fax .fcache ???? Font Mac OS X file collection cache .fcp ???? Graphic Atari Flash Colour Picture (FCP) compressed with RLE .fdb DBSE Special Portfolio .fdf FDF Word processing Acrobat Forms Data Format (FDF) .fdp ???? Special Portfolio .fft TEXT Word processing Document Content Architecture - Final Form Text (DCA-FFT) .fh11 ???? Graphic Freehand MX .fh4 ???? Graphic Freehand 4 .fh5 ???? Graphic Freehand 5 .fh8 ???? Graphic Freehand 8 .fh9 ???? Graphic Freehand 9 .fhc ???? Graphic Freehand .fit FITS Graphic Flexible Image Transport System (FITS) .fla BINA Movie Flash .flc FLI Movie FLIC animation, also known as File .fli FLI Movie FLIC animation, also known as Autodesk Animator File .flm ???? Movie Atari Animatic film format .flv ???? Movie Flash video format .fm FASL DTP FrameMaker .fm FMPR Database FileMaker Pro .fm1 ???? Database Lotus 1-2-3 version 2 .fm3 ???? Database Lotus 1-2-3 version 3 .fmp FMP3 Database FileMaker Pro .fmx iDLL Database FileMaker plug-in .fon ???? Font Windows FONT .for TEXT Programming FORTRAN source .fp3 FMP3 Database FileMaker Pro 3 or 4 .fp5 FMP5 Database FileMaker Pro 5 .fpix FPix Graphic FlashPix for fast digital images .fpix FPX Graphic FlashPix open standard for fast digital images .fpx FPix Graphic FlashPix open standard for fast digital images .fpx FPX Graphic FlashPix open standard for fast digital images .fsv TEXT Graphic Unix FaceSaver .fts FITS Graphic Flexible Image Transport System (FITS) .fxp FFXP Database FoxPro Format File .gcf GC03 Special Graphing .gdm ???? Music General DigiMusic .gem GEM- Graphic Ventura Publisher GEM Metafile . GIFf Graphic Graphic Interchange File (GIFF) .gif GIFf Movie Animated Graphic Interchange File (GIFF) .gl GL Movie GRASP GL animation or image collection (MacAnim Viewer) .grp GRPp Graphic GRP format .gsf LWFN Font GhostScript font, not compatible with ATM .gsm GSM Sound Coded speech for GSM mobile phone or Internet .gz Archive Gnu .h TEXT Programming C Include file .ham ???? Graphic Amiga 24-bit IFF-HAM or Extra Halfbright IFF-HAM-E .hcom FSSD Sound SoundCap or SoundEdit .help Special Mac OS X help .hip TEXT Graphic Unix HIPS format .hlp TEXT Special Help file .hp TEXT Programming C Include file .hpgl HPGL Graphic HP-GL/2 metafile .hpp TEXT Programming C Include file .hqx TEXT Internet BinHex 4, containing both forks of Classic Mac OS file .hr TR80 Graphic TRS-80 .htm TEXT Internet Hypertext Markup Language (HTML) file . TEXT Internet Hypertext Markup Language (HTML) file .hyp TEXT Special Adobe hyphenation rules .i3 TEXT Programming Modula 3 interface .ic1 IMAG Movie or Graphic Atari Imagic IMAG 16-colour film or picture file .ic2 IMAG Movie or Graphic Atari Imagic IMAG 4-colour film or picture file .ic3 IMAG Movie or Graphic Atari Imagic IMAG monochrome film or picture file .icc prof Special ICC Mac OS ColorSync colour matching profile .icm prof Special ICC Mac OS ColorSync colour matching profile .icn ICO Windows icon .icns ICNS Icon Mac OS X icon family . ICO Icon Windows Icon .ics ???? Special Apple iCal file .idx TEXT Special Index (various formats) .ief IEF Graphic IEF .iff 8SVX Sound Amiga Interchange File Format (IFF) 8-bit mono sound .iff ILBM Graphic Amiga Interchange File Format IFF-ILBM .iff ???? Graphic Amiga Interchange File Format IFF-RGB8 .iff ???? Graphic Amiga Interchange File Format IFF-RGBN .ifo ???? Special IFO file, used on DVD-Video . ILBM Graphic Amiga Interchange File Format IFF-ILBM .im1 SUNn Graphic 1-bit image .im8 SUNn Graphic Sun raster 8-bit image .im24 SUNn Graphic Sun raster 24-bit image .image dlmg Archive Apple Disk Copy .image EIDI Graphic Electric Image .imf ???? Music Imago Orpheus .img ???? Graphic Atari STAD or XIMG formats .img dimg Archive Apple Disk Copy or ShrinkWrap disk image .img hdro Archive Apple Disk Copy disk image .img IMGg Graphic Ventura Publisher GEM bitmap IMG/XIMG .img KONT Graphic KONTRON .img roCd Archive ShrinkWrap disk image .img rohd Archive Apple Disk Copy or ShrinkWrap disk image .img rwCd Archive ShrinkWrap disk image .inc TEXT Programming CodeWarrior 'include' file .indd ???? DTP InDesign document .ini TEXT Special Initialisation (INI) file (Windows and other formats) .inf BINA Special Information file (various formats) .ips IPIX 3D Image Interactive Pictures (IpixViewer) .ipx IPIX 3D Image Interactive Pictures (IpixViewer) .iss ISS Graphic ISS .it IT Music MOD file (PlayerPRO) .itl ???? Special iTools Commands .ivr TEXT 3D Image Virtual Reality Markup Language (VRML) file . TEXT Programming Java resource, sometimes in form of ZIP file .java TEXT Programming Java source .jfif JPEG Graphic Joint Photographic Experts Group (JPEG) file .jfx TIFF Graphic JFax TIFF .jhtml TEXT Internet Similar to .shtml file, but containing Java .jif JIFf Graphic Joint Photographic Experts Group (JPEG) file .jms TEXT Internet Java Message Service, for Web site messages .jpe JPEG Graphic Joint Photographic Experts Group (JPEG) file . JPEG Graphic Joint Photographic Experts Group (JPEG) file .jpg JPEG Graphic Joint Photographic Experts Group (JPEG) file .js TEXT Internet JavaScript .jsp TEXT Internet Java Server Page, for dynamic pages at Web site .jta TEXT Internet Java Transaction API, for Web site transactions .jvr KinS Database 4th Dimension .kext ???? Special Mac OS X Kernal Extension file .kar Midi Music Karaoke Musical Instrument Data Interface (MIDI) file .ksd ???? Special Via Voice Keyboard Shortcuts Dictionaries Editor file .lasso ???? Special Lasso file .latex TEXT Word processing LaTex source file .lbm ILBM Graphic Amiga IFF-ILBM format .ldi ???? Database LDIF data, as used for address book .ldif ???? Database LDIF data, as used for address book .lfa DAN2 3D Image Life Forms 3.x . LHA Archive LHarc .lhz LHA Archive LHarc .lib ???? Special Library (various formats) .liv ???? Movie Live Motion .lnk ???? Special Windows Linker file .log ???? Special Log file (various formats) .logo WBMP Graphic LOGO .loop ???? Sound Apple Soundtrack/GaragBand audio loop .lproj Folder Mac OS X language project folder .lwf lwfF Graphic LuraWave .lwo ???? 3D Image Lightwave object file .m15 ???? Music 15-instrument Amiga MOD file .m15 MPEG Movie Motion Picture Experts Group (MPEG-1) file .m1a MPEG Movie Motion Picture Experts Group (MPEG-1) file .m1s MPEG Movie Motion Picture Experts Group (MPEG-1) file .m1v MPEG Movie Motion Picture Experts Group (MPEG-1) IPB video .m2 TEXT Programming Modula 2 source .m2s MPG2 Movie Motion Picture Experts Group (MPEG-2) file Motion Picture Experts Group (MPEG-2) IPB video (DVD- .m2v MPG2 Movie Video) .m3 TEXT Programming Modula 3 source .m3u PNRA Sound RealPlayer .m4a ???? Sound MPEG-4 Advanced Audio Coding (AAC) file .m75 MPEG Movie Motion Picture Experts Group (MPEG-1) file .mac PICT Graphic Mac OS PICT .mac PNTG Graphic MacPaint .mac TEXT Word processing Classic Mac OS text .mad MADC Music MADC (PlayerPRO) .madf MADF Music MADF (PlayerPRO) .madh MADH Music MADH (PlayerPRO) .madi MADI Music MADI (PlayerPRO) .mak ???? Programming Microsoft project .mak TEXT Special Makefile .map ???? Special Program Link Map file .mbd ???? Special Multimedia Builder (MMBuilder) Document .mbm MBM Graphic PSION 5 Organiser file .mbox Special Mac OS X mailbox package .mcd ???? 3D Image VectorWorks .mcp MMPr Programming Mac OS CodeWarrior project .mcw WDBN Word processing Word (Mac) .mdp ???? Programming Microsoft project .mdz MDZ Music x-Zipped MOD file (PlayerPRO) .me TEXT Word processing Me text .med MED Music Music Editor/OctaMED MED format (PlayerPRO) .mem BINA Special PC MS-DOS DBase Memory file .mf TEXT Font Metafont .mgr TEXT Graphic Unix MGR Window Manager dump .mid Midi Music MIDI sequence .midi Midi Music MIDI sequence .mif TEXT Special FrameMaker Metafile (MIF) .mim TEXT Internet MIME mail message coded using Base 64 .mime TEXT Internet MIME mail message coded using Base 64 .ml TEXT Programming ML source file .mlp ???? Special MacLinkPlus Print Capture file .mmf MMMF Music Meditor .mno ???? Special Metafile Note file .mod Strk Music Amiga Sound Tracker music module (MOD) (Player PRO) .mol TEXT Special MDL Molfile .moov MooV Movie QuickTime movie .mov MooV Movie QuickTime movie .mp1 MPEG Sound MPEG-1 .mp2 MPEG Movie MPEG-1 . MP3 Sound MPEG Layer-3 (MP3) .mp3 MPG3 Sound MPEG Layer-3 (MP3) .mp3 Mp3 Sound MPEG Layer-3 (MP3) .mp4 mpg4 Movie MPEG-4, also used for various multimedia material .mpa MPEG Movie MPEG-1 .mpe MPG2 Movie MPEG-2 (DVD-Video discs) .mpeg MPEG Movie MPEG-1 .mpeg MPG2 Movie MPEG-2 (DVD-Video discs) .mpg MPEG Movie MPEG-1 .mpg MPG2 Movie MPEG-2 (DVD-Video discs) .mpga MPEG Sound MPEG audio .mpm MPEG Movie MPEG-1 .mpv MPEG Movie MPEG-1 .msi ???? Special Microsoft Installer file .msp MSPp Graphic .mtm MTM Music MultiTracker MOD file (MultiMOD) .mtv ???? 3D Image Raytrace MTV format .mus DHAR Music Melody Assistant .mvh MooV Movie QuickTime movie .mw MW2D Word processing MacWrite II .mwd MBBT Word processing Mariner Document .mwii MW2D Word processing MacWrite II .ndx diDX Movie Director index file .neo NeoC Graphic Atari NeoChrome format .nff ???? Graphic Nikon raw format used in cameras .nfo TEXT Word processing Information text .ngg NGGC Graphic Mobil Phone .nib Special Mac OS X Interface Builder file (XML) used in APP .nol NOL Graphic Mobil Phone .nsl pref Special Network Services preferences .nst Strk Music Amiga music module (MOD) format (Player PRO) .nxt NeXT Sound µ-law format (NeXT) .o ???? Programming Object library .obj PCFL Programming Compiled object file (OBJ) .obj ???? 3D Image Alias Wavefront object file .oda ODIF Special ODA document .okt OKTA Music Oktalyzer MOD file (Player PRO) .ogg OggS Sound Ogg .otf sfnt Font OpenType scalable font .osax osax Special Mac OS X AppleScript scripting addition .out BINA Special Binary output file (various formats) .ovl PCFL Special PC MS-DOS or Windows overlay (OVL) .ovr ???? Special Program overlay .p TEXT Programming Pascal source .p12 PK12 Security Access key exchange file .p7c PK07 Security Keychain Access digital certificate .p7m PK07 Security Keychain Access cryptographic message .p7s PK07 Security Keychain Access digital signature .pac STAD Graphic Atari STAD .pal TEXT Graphic ASCII PAL image .pas TEXT Programming Pascal source . ???? Archive Mac OS X file .pbm PPGM Graphic Unix portable bitmap .pc TEXT Word processing PC text .pc1 Dega Graphic Atari Degas compressed .pc2 Dega Graphic Atari Degas compressed .pc3 Dega Graphic Atari Degas compressed .pcc PCXx Graphic PCX (ZSoft or PC Paintbrush) .pcm ???? Sound PCM audio, used on DVD-Video .pcs PICS Movie Mac OS PICT sequence .pct PICT Graphic Mac OS PICT image . PCXx Graphic PCX/SCR (ZSoft or PC Paintbrush) .pcx PICT Graphic Photoshop .pdb **** Special PalmOS database (HotSync) .pdb KSic Graphic Tiny Viewer .pdb MkCF Graphic MonkeyCard .pdb MkLG Graphic MonkeyLogo .pdb PDB Graphic FireViewer .pdb TEXT Graphic Brookhaven .pdb TlPt Graphic TealPaint . PDF Desktop publishing PDF (Acrobat) .pdx TEXT Desktop publishing PageMaker printer description .pf CSIT Security Aladdin Private File (PF) document .pf prof Special Mac OS ColorSync colour matching profile .pfa TEXT Font Type 1 PostScript font .pfb BINA Font Type 1 PostScript font .pfm BINA Font Type 1 PostScript font metrics .pfr TEXT Font TrueDoc font .pgc PGCF Graphic Atari Portfolio .pgm PPGM Graphic Unix portable greymap format .pgp pgPR Security PGP signer key file (PGPkeys) .php TEXT Internet PHP file for server-side code .pi1 Dega Graphic Atari Degas .pi2 Dega Graphic Atari Degas .pi3 Dega Graphic Atari Degas .pic ???? Graphic Lotus vector format .pic PICT Graphic Mac OS PICT image .pic ???? Graphic Pictor, not compatible with Lotus .pic PSIO Graphic PSION Organiser file .pic SOFT Graphic SoftImage .pics PICS Movie Mac OS PICT sequence . PICT Graphic Mac OS PICT image .pif ???? Special Windows Program Information File (PIF) .pih PICT Graphic Mac OS PICT image .piq PICT Graphic Mac OS PICT image .pit PIT Archive PackIt .pix ???? 3D Image 3D .pkg HBSF Archive AppleLink Package containing Classic Mac OS files .pkg Special Mac OS X installation package .pkg pkg Special Newton personal organiser package .pl TEXT Programming script (Unix) Mac OS X Property List (PLIST) in XML, as used in APP .plist Special (package) .plg ???? Special Plug-in (various formats) .pls PLS Sound Play list (RealPlayer and others) .plt HPGL Graphic HP GL/2 format .plugin Special Mac OS X Plug-in .pm PMpm Graphic XV bitmap .pm TEXT Programming Pearl module (MacPearl) .pm3 ALB3 Desktop publishing PageMaker 3 .pm4 ALB4 Desktop publishing PageMaker 4 .pm5 ALB5 Desktop publishing PageMaker 5 .pnc **** Special PalmOS application (HotSync) .png PNGf Graphic Portable Network Graphic (PNG) .pnt PNTG Graphic MacPaint or SuperPaint .pntg PNTG Graphic MacPaint or SuperPaint .ppd TEXT Desktop publishing Printer description (PageMaker) .ppm PPGM Graphic Unix portable bitmap (PBM), PGM or pixmap (PPM) .pps ???? Special PowerPoint slide show .ppt SLD3 Special PowerPoint presentation .pqa **** Special PalmOS application (HotSync) .pqh PICT Graphic Mac OS PICT image .pr2 ???? Special Persuasion Windows file .prc **** Special PalmOS application (HotSync) .prg ???? Special dBase Program file .prg BINA Special MS-DOS application program .prj MMPr Programming Mac OS CodeWarrior project .prn TEXT Database Printer output file, usually CSV .ps TEXT Graphic or DTP PostScript document .psd 8BPS Graphic Photoshop .psw ???? Word processing Pocket Word document (Pocket PC) .pt4 ALT4 Desktop publishing PageMaker 4 template .pt5 ALT5 Desktop publishing PageMaker 5 template .pub PUBF Desktop publishing PageMaker 2 .pwi ???? Special Pocket PC Notes document .px EPSF Graphic Photoshop EPSF .pxr PXR Graphic Photoshop pixar (PXR) .pxr ???? 3D Image Pixar .py TEXT Programming Python script (Unix) .qcp celp Sound QUALCOMM PureVoice .qdv QDVf Graphic QDV format .qif ???? Special Quicken Interchange Format (QIF) for financial data .qif qtif Graphic QuickTime Image .qrt ???? 3D Image Raytrace QRT format .qt MooV Movie QuickTime movie (deprecated ) .qti qtif Graphic QuickTime Image (PictureViewer) .qtif qtif Graphic QuickTime Image (PictureViewer) .qtl qtlk Movie QuickTime Player movie .qxd XDOC Desktop publishing QuarkXpress document .qxp ???? Desktop publishing QuarkXpress .qxt XTMP Desktop publishing QuarkXpress template .r TEXT Programming Mac OS Rez source (MPW) .ra PNRA Sound Real Audio .ram PNRA Sound Real Audio . RARf Archive MacRAR .ras SUNn Graphic Sun raster image .raw RAW Graphic RAW image data (various formats) .readme TEXT Word processing Read Me .rf SUNn Graphic Sun raster image .rf PNRA Real-time streaming RealFlash clip (RealPlayer) .rft TEXT Word processing DCA - Revisable Form Text (DCA-RFT) .rgb .SGI Graphic Silicon Graphics SGI .rgba .SGI Graphic Silicon Graphics SGI .rib TEXT 3D Image Renderman 3D .rif RIFF Graphic Raster Image File Format (RIFF) (Letraset Imagestudio) .rix RIX3 Graphic ColoRIX or EGAPaint .rjs PNRA Real-time streaming RealSystem skin (RealPlayer) .rla ???? 3D Image Alias Wavefront SDSC raster image file .rle RLE Graphic Run Length Encoding (RLE) or C-RLE compressed file .rm PNRA Real-time streaming RealMedia audiovisual file (RealPlayer) .rme TEXT Word processing Read Me text .rmf RMF Desktop publishing Acrobat Rights Media File (RMF) .rmf ???? Music Beatnik Rich Music Format (RMF) .rmj PNRA Real-time streaming RealMedia clip (RealPlayer) .rmm PNRA Real-time streaming RealPlayer .rmp RMP Real-time streaming RealJukebox Music Package (RealPlayer) .rmx PNRA Real-time streaming RealSystem Secure Media Clip (RealPlayer) .rnx PNRA Real-time streaming RealPlayer .rp PNRA Real-time streaming RealPix clip (RealPlayer) .rpf ???? 3D Image RPF .rpl FRL! Real-time streaming Replica .rpm PNRA Real-time streaming RealPlayer plug-in .rpm Special Red Hat Package Manager file .rs SUNn Graphic Sun raster image .rsc rsrc Programming Mac OS Resource file (ResEdit) .rsrc rsrc Programming Mac OS Resource file (ResEdit) .rss TEXT Internet Really Simple Syndication (RSS) XML file .rt PNRA Real-time streaming RealText clip (RealPlayer) .rtf RTF Graphic Rich Text Format (RTF) image .rtf TEXT Word processing Rich Text Format (RTF) .rtfd Folder Mac OS X folder containing RTF files and graphics .rts RTSP Real-time streaming RTSP stream descriptor file (QuickTime) .rtsp RTSP Real-time streaming RTSP stream descriptor file (QuickTime) .rtx TEXT Word processing Rich text .rv PNRA Real-time streaming RealVideo clip (RealPlayer) .rzi ???? 3D Image REALVIZ ImageModeler 3 . S3M Music ScreamTracker 3 MOD file (S3M) (PlayerPRO) .sam TEXT Word processing AmiPro .sbr ???? Programming Microsoft Source Browser support file .scc MSX Graphic MSX format .scg RIX3 Graphic ColoRIX or EGAPaint .sci RIX3 Graphic ColoRIX or EGAPaint .scp **** Special PalmOS application (HotSync) .scp RIX3 Graphic ColoRIX or EGAPaint .scpt osas Special Mac OS X compiled AppleScript script .scr osas Special Mac OS compiled AppleScript script .scr RIX3 Graphic ColoRIX or EGAPaint .scr ???? Programming DOS Debug source file .scr ???? Special Windows screen saver file .scu RIX3 Graphic ColoRIX or EGAPaint .sd SFIL Sound Sound Designer .sd2 Sd2f Sound Sound Designer II .sdes Sd2f Sound Sound Designer II .sdp SDP Real-time streaming Scalable multicast stream descriptor .sea APPL Archive Self-extracting archive (SEA) (various formats) .sf IRCM Sound IRCAM mono or stereo format (SoundHack) .sf2 ???? Sound Creative Labs Soundfont 2 sound sample bank .sfil sfil Sound Classic Mac OS System sound .sgi .SGI Graphic Silicon Graphics SGI .sgm TEXT Special Standard Generalised Markup Language (SGML) .sgml TEXT Special Standard Generalised Markup Language (SGML) .sh TEXT Programming Shell Archive () script (Unix) .sha TEXT Programming Shell Archive (SHAR) script (Unix) .shar TEXT Programming Shell Archive (SHAR) script (Unix) .shk ???? Movie Apple Shake video compositing file .shl shlb Special Mac OS shared library file, sometimes as a plug-in .shlb shlb Special Mac OS shared library file, sometimes as a plug-in .shp SHPp Graphic Printmaster icon library .shr ???? Graphic Apple IIGS Super-HiRes format .shr TEXT Programming Shell Archive (SHAR) script (Unix) .shs TEXT Programming Shell Archive scrap (Unix) .shtm TEXT Internet HTML file, processed by server before downloading .shtml TEXT Internet HTML file, processed by server before downloading .sid sidf Graphic MrSID .sit SIT5 Archive StuffIt 5.x or higher .sit SITD Archive StuffIt 4.x or lower .sithqx TEXT Archive Binhexed StuffIt file .sitx ???? Archive StuffIt Mac OS X format .six SIXE Graphic SIXEL .sk TEXT Spreadsheet (SYLK) .skp ???? 3D Image SketchUp .slk TEXT Spreadsheet Symbolic Link (SYLK) .smf Midi Music Standard MIDI File (SMF) .smi .SMI Special SMIL .smi APPL Archive Self-mounting image (Disk Copy or ShrinkWrap) .smil .SMI Special SMIL .snd BINA Sound Generic format (SoundApp) .snd ULAW Sound µ-law format (Sun Audio) .snd NeXT Sound µ-law format (NeXT) .spc ???? Sound SPC audio, used on DVD-Video .spc Spec Graphic Atari Spectrum 512 image .spl BINA Movie FutureSplash Player .sr SUNn Graphic Sun raster .src issp Internet Internet search site (Mac OS) .srd APPL Special Self-reading document (application) .ssm PNRA Real-time streaming Standard Streaming Metafile (SSM) (RealPlayer) .stg TDAT Programming CodeWarrior file .stk Stak Special HyperStudio stack .stm TEXT Internet HTML file, processed by server before downloading .stm ???? Music ScreamTracker 2 MOD file (STM) (PlayerPRO) .stn ???? Image Genuine Fractals (GF) compressed image .stx ???? Music STMIK 0.2 .sty TEXT DTP TeX style (OzTex) .sty ???? Word processing Word style .suit FFIL Font Classic Mac OS font suitcase .sun SUNn Graphic Sun raster .sup SCRN Graphic Classic Mac OS startup screen .svg svg Graphic Scalable (SVG) (Illustrator) .svgz svgz Graphic (SVG) (Illustrator) .svx 8SVX Sound Amiga Interchange File Format (IFF) 8-bit mono sound . SWFL Movie Macromedia Shockwave Flash (SWF) .syk TEXT Spreadsheet Symbolic Link (SYLK) format .syl TEXT Spreadsheet Symbolic Link (SYLK) format .sylk TEXT Spreadsheet Symbolic Link (SYLK) format .sys BINA Special PC MS-DOS system file .t1 FFIL Font Classic Mac OS font suitcase for related PostScript Type 1 font . TARF Archive Unix tape archive (TAR), uncompressed .targa TPIC Graphic Targa Truevision (TGA) .taz ZIVU Archive Unix tape archive (TAR), Lempel-Ziv compressed .tbz Bzp2 Archive Unix tape archive (TAR), BZip2 compressed .tcl TEXT Programming Tickle .tdf TEXT Spreadsheet/database Tab-delimited text, equivalent to TSV .tdi ???? 3D Image Maya 3D image file .tdm ???? Sound TDM Plug-in for audio applications .tex TEXT DTP TeX source (OzTex) .texi TEXT DTP TeX source (OzTex) .texinfo TEXT DTP TeX source (OzTex) .text TEXT Word processing ASCII text .tga TPIC Graphic Targa Truevision (TGA) .tgz GZip Archive Unix tape archive (TAR), GZip compressed .tif TIFF Graphic Tagged Image Format File (TIFF) . TIFF Graphic Tagged Image Format File (TIFF) .tiff TIF Graphic Tagged Image Format File (TIFF) .tiff tiff Graphic Tagged Image Format File (TIFF) .tiff tif Graphic Tagged Image Format File (TIFF) .tiga TPIC Graphic Targa Truevision (TGA) .tfm ???? Font TeX font .tkn ???? Internet E-mail token of file for later download .tmp ???? Special Template (various formats) .tmpl ???? Special Template (various formats) .tny TINY Graphic Atari TINY bitmap format .tpic TPIC Graphic Targa Truevision (TGA) .tsv TEXT Spreadsheet/database Tab Separated Values (TSV) .tt FFIL Font Classic Mac OS font suitcase (TrueType font family) .ttc ttcf Font TrueType font collection .ttf FFIL Font Classic Mac OS font suitcase (TrueType font family) .ttf sfnt Font Windows TrueType scalable font .tx8 TEXT Word processing 8-bit text .txt TEXT Graphic ASCII image .txt TEXT Word processing ASCII text .ul ULAW Sound µ-Law (Sun Audio) .ulaw ULAW Sound µ-Law (Sun Audio) .ult ???? Music Ultratracker MOD file .ulw ULAW Sound µ-Law (Sun Audio) .url AURL Internet Uniform Resource Locator (URL) bookmark .usr ???? Security User certificate .uu TEXT Archive Unix-to-Unix encoded file (UUencoded) .uue TEXT Archive Unix-to-Unix encoded file (UUencoded) .vcf ???? Special Virtual (vCard) .vcs ???? Special Virtual calendar (vCal) .vef ???? Special Virtual event file (Now Up-to-Date) .vfb VFB1 Font FontLab font .vff VFFf Graphic DESR VFF greyscale format .vfw VfW Movie Video For Windows (VfW, also known as AVI) .view IndX Word processing Easy View index .vga BMPp Graphic PC OS/2 bitmap .vgs ???? Music Voice of the Goat Cactus studio file .viv ???? Movie Vivo .vob ???? Movie Video Object (VOB), for recording video onto DVD .voc VOC Sound PC Sound Blaster VOC format .vpb VPB Graphic QUANTEL .vrml TEXT 3D Image Virtual Reality Markup Language (VRML) file .vsd ???? Graphic Visio drawing .vtc ???? Movie MPEG-4 (e-Vue Image Viewer) .w3d ???? 3D Image Director 3D and Shockwave 3D .w51 .WP5 Word processing PC WordPerfect 5.1 .w61 WPD3 Word processing Mac WordPerfect 6.1 .waf WAFF Internet Web (WAF) . ???? Internet Web Application Archive . WAVE Sound Windows WAVE format .wax ASX_ Sound Windows Media format .wbd ???? Database Works database .wbmp WBMP Graphic Wireless Bitmap for WML and WAP mobile phones .wk1 XLBN Spreadsheet Lotus 2 .wk3 XLBN Spreadsheet Lotus 3 (3D) .wk4 ???? Spreadsheet Lotus 4 .wks XLBN Spreadsheet Lotus 1 .wm ASF_ Movie Windows Media (WM) format .wma ASF_ Sound Windows Media (WM) format .wmd WMD_ Movie Windows Media (WM) format .wmf .WMF Graphic Windows Metafile (WMF) .wmf WMF Graphic Windows Metafile (WMF) .wml TEXT Internet Wireless Markup Language (WML) for WAP mobile phones .wmp ASF_ Movie Windows Media (WM) format .wmv ASF_ Movie Windows Media (WM) format .wmx ASX_ Movie Windows Media (WM) format .wp ???? Word processing OfficeWriter .wp WPD3 Word processing Mac WordPerfect 3.1 .wp .WP5 Word processing PC WordPerfect 5.1 .wp4 .WP4 Word processing PC WordPerfect 4.2 .wp5 .WP5 Word processing PC WordPerfect 5.x .wp6 .WP6 Word processing PC WordPerfect 6.x .wpf TEXT Word processing WordPerfect text .wpg WPGf Graphic WordPerfect graphic (WPG) .wpl ???? Word processing WPS-Plus VMS document .wpm WPD1 Word processing Mac WordPerfect .wps WDBN Word processing Works .wq1 ???? Spreadsheet Quattro Pro spreadsheet .wrd WDBN Word processing Word .wri WDBN Word processing Windows Microsoft Write .wrk ???? Spreadsheet Symphony .wrl TEXT 3D Image Virtual Reality Markup Language (VRML) file .wrl ???? Spreadsheet Symphony .wrz TEXT 3D Image Virtual Reality Markup Language (VRML) file .ws TEXT Word processing WordStar .wve PSI5 Sound PSION Organiser 5 sound file with EPOC 32 encoding .wve PSON Sound PSION Organiser 3 sound file with a-law encoding .wvx ASX_ Movie Windows Media format .x-face TEXT Graphic X-Face .x10 XWDd Graphic Unix X-Windows dump () .x11 XWDd Graphic Unix X-Windows dump (XWD) .xbm XBM Graphic Unix X-Windows bitmap (XBM) .xdo TEXT Graphic Unix Xerox Doodle Brush .xfdf XFDF Desktop publishing Acrobat Forms Data Format (FDF) in XML .xib Special Mac OS X Interface Builder file (XML) used to form APP .xif TIFF Graphic Tagged Image Format File (TIFF) for fax .xja TEXT Internet Embedded Java applet .xja11 TEXT Internet Embedded Java applet version 1.1 .xja112 TEXT Internet Embedded Java applet version 1.1.2 .xjv TEXT Internet Embedded JVM .xl XLS Spreadsheet Excel .xla ???? Spreadsheet Excel add-in macro .xlc XLC Spreadsheet Excel chart .xlm XLM4 Spreadsheet Excel 4 macro .xls XLS3 Spreadsheet Excel 3 .xls XLS5 Spreadsheet Excel 5 .xlt ???? Spreadsheet Excel template .xlw XLW5 Spreadsheet Excel 5 work space . XM Music FastTracker 2/Digital Tracker MOD file (PlayerPRO) . TEXT Special Extensible Markup Language (XML) file .xmp ???? Special Adobe Extensible Metadata Platform data in separate file .xp XDOC Desktop publishing QuarkXpress (XP) .xpl PNRA Real-time streaming Play list (RealPlayer) .xpm XPM Graphic Unix X-Windows pixmap (XPM) .xtg ???? Desktop publishing QuarkXpress tags file .xwd XWDd Graphic Unix X-Windows dump (XWD) .xy ???? Word processing XYWrite .yenc ???? Archive yEncode file (Usenet groups) .yuv .YUV Graphic Diskus YUV .Z ZIVU Archive Lempel-Ziv compressed Unix file .z ZIVU Archive Lempel-Ziv compressed Unix file .zip ZIP Archive PC Zip (PKZip) compressed file . Zoo Archive Zoo