| Home (Frames) | Home (Noframes) |
| Ext | Description | Goto Shareware |
 Up | ||
| .NA2 | Netscape Communicator addressbook | |
| .NAB | Netscape Communicator AddressBook | |
| .NAP | Vector image (Naplps format) (VideoShow/EnerGraphics) | |
| .NAPLPS | Vector image (North American Presentation Layer Protocol Syntax) | |
| .NAV | Ms Network component? | |
| .NB | Text document (Nota Bene) | |
| .NC | Graphics (Unidata netCDF) | |
| .NC | Instructions for NC (Numerical Control) machine (CAMS) | |
| .NC | Preprosessed GOC source code file (non-error-checking version) (GEOS) | |
| .NCB | Class browsing information (Ms Developer Studio) | |
| .NCC | CNC (Computer Numeric Control) control file (CamView 3D) | |
| TREEINFO.NCD | Norton Commander Directory tree | |
| .NCF | Novell NetWare ConFiguration | |
| .NCM | Nokia Communicator configuration message | |
| .NCS | Netscape Conference Call file | |
| .NCSA | Bitmap image (Hierarchical Data File) (NCSA) | |
| .NDB | Network database (Intellicom/Compex) | |
| .NDL | Lotus Notes data | |
| .NDL | Inmos hardware network description file | |
| .NDL | Nodelist file | |
| .NDX | Non-maintained dBASE database index | |
| .NEO | Atari NeoChrome bitmap image | Various: XNV |
| .NET | Network configuration/info file | |
| .NETCDF | Scientific data NETwork Common Data Format | |
| .NEW | New info Notepad | |
| .NEWS | NeWS bitmap image | |
| .NFF | Haines Neutral File Format, minimal 3D scene description language | PT |
| .NFF | WorldToolKit Neutral File Format (ASCII) used for virtual reality | |
| .NFO | MsInfo document | |
| .NFO | Filioview database | |
| .NFO | Netware Folio help format | |
| .NFO | Info file | |
| .NG | Online documentation database (Norton Guide) | |
| .NGB | Nonogram puzzle | |
| .NGG | Nokia Group-Graphic (Kessler Wireless Design) | |
| .NGO | NG linker object file (NGML) | |
| .NGS | NG compiler source file (NGC) | |
| .NIF | Bitmap image (Navy Interchange File Format) | |
| .NIF | Binary hardware network initialisation file | |
| .NIFF | Bitmap image (Navy Interchange File Format) | |
| .NIL | Icon Library | |
| .NITF | National Imagery Transmission Format | |
| .NL | Norton Desktop Icon Library | |
| .NLM | Netware Loadable Module (Novell Netware) | |
| .NLS | National Language Support | |
| .NLX | FormWorx form | |
| .NOL | Nokia Operator-Logo (Kessler Wireless Design) | |
| .NON | NONogram puzzle | |
| .NOT | NOTation or NOTe | |
| .NOTE | WordPerfect for Mac help document | |
| README.NOW | Textfile Notepad | |
| .NP | Project schedule (Nokia Planner) (Visual Planner 3.x) | |
| .NPI | Source for DGEN.EXE interpreter (dBASE Application Generator) | |
| .NPM | Nokia Picture-Message (Kessler Wireless Design) | |
| .NPS | Lotus Agenda File | |
| .NRF | Bitmap image (Neutral Raster File) | |
| .NRI | Nero - Burning Rom (CD-burner software) file | |
| .NS2 | Lotus Notes data | |
| .NS3 | Lotus Notes data | |
| .NSF | Lotus Notes data | |
| .NSG | Lotus Notes data | |
| .NSH | Lotus Notes data | |
| .NSS | Norton ScreenSaver module (NC - NDW Screen Saver) | |
| .NST | NoiseTracker/Protracker music module, originaly from Amiga | WA |
| .NSX | Compound index file (SuccessWare SIX 3.00) | |
| .NT | Windows NT startup files | |
| .NTF | Lotus Notes data | |
| .NTR | Executable ascii text file (strip header and rename) (NetRun) | |
| .NTS | Executable ascii text file (strip header and rename) (NetSend) | |
| .NTS | Norton tutorial | |
| .NTX | Clipper database index | |
| .NUF | Message for new users on their 1st call (Procomm Plus) | |
| .NULL | NULL image | IM |
| .NWS | Outlook Express NeWS file Mime: message/rfc822 | |
| .NWS | Latest NeWS info text file Notepad | |
| .NXT | Sound (NeXT format) | |
| Up | ||
| Ext | Description | Goto Shareware |
| .O | Object file (Unix/Atari/GCC) | |
| .O$$ | Sprint outfile | |
| .OAZ | NetFax Manager fax | |
| .OB | OBject cut/paste file (IBM LinkWay) | |
| .OBD | Ms Office Binder Document | QVP |
| .OBJ | Compiled machine language code (Intel Relocatable OBJect Module) | FMV |
| .OBJ | Metatools' Bryce Support file (OBJects) | |
| .OBJ | Wavefront 3D OBJect | PT |
| .OBR | Borland C++ object browser data file | |
| .OBS | Script (ObjectScript) | |
| .OBT | Ms Office Binder Template | |
| .OBV | ObjectScript visual interface | |
| .OBZ | Ms Office Wizard Binder | |
| .OCA | Visual Basic control typelib cache | |
| .OCF | Object Craft File | |
| .OCR | Incoming fax transcribed to text (FAXGrapper) | |
| .OCT | Musical file (Octalizer) | |
| .OCX | OLE Custom Control, 32 bit, can be used by some program languages like e.g. Visual Basic or C++, often an activeX control | PP, QVP |
| .ODA | ODA document | |
| .ODA | Raster image (CALS Group IV Type 2) | |
| .ODF | Open Document Interchange Format (ODIF) | |
| .ODIF | Open Document Interchange Format | |
| .ODL | Object Definition Language file (Ms Developer Studio) | |
| .OFD | ObjectView Form Definition | |
| .OFF | 3D Object File Format | |
| .OFM | PostScript font description file | |
| .OFN | Ms Office document | |
| .OFT | Ms Outlook item template | |
| .OGG | Ogg Vorbis sound | AH, CDMP3 |
| .OHS | Outbound History (Bink/+) | |
| .OID | Object Interaction Diagram (Prosa/OM) | |
| .OKT | OKTalizer Module (sound) | |
| .OLB | OLE object library | |
| .OLB | Object library (VAX) | |
| .OLD | Backup file | |
| .OLE | OLE object | |
| .OLI | Olivetti text file | |
| .OLK | Ms Outlook address book | |
| .OMD | Class model (Prosa/OM) | |
| .OMF | Avid video editor interchange file | |
| .OOM | Shroom swap file | |
| .OPA | Psion OPL object file | |
| .OPL | Psion OPL language source code file | |
| .OPN | Active options (Exact) | |
| .OPO | Psion OPL object file | |
| .OPT | Configuration information (OPTions) used by several programs | |
| .OPT | QEMM OPTimize support file | |
| .OPW | Org Plus for Windows organization chart | |
| .OPX | Ms Organization chart | |
| .OPX | Exact inactive options | |
| .OR8 | Rational Rose Oracle8 database model report | |
| .ORA | Oracle parameter file | |
| .ORG | Lotus Organizer calendar file | |
| .ORG | Microcal Origin plot | |
| .OSS | Ms Office search result | |
| .OST | Microsoft Inbox offline folder file | |
| .OTL | Z-Soft Type Foundry outline font description | |
| .OTL | Ventura Publisher's Type Foundry Outline Editor format | |
| .OTL | OpenTrap Event Log | |
| .OTX | Olivetti Olitext Plus text file | |
| .OUT | OUTput | |
| .OV1 | Overlay file (part of program to be loaded when needed) | |
| .OV2 | Overlay file (part of program to be loaded when needed) | |
| .OVD | ObjectVision datafile | |
| .OVL | OVerLay (part of program to be loaded when needed), program code for DOS | |
| .OVR | OVeRlay (part of program to be loaded when needed), program code for DOS | |
| .OYZ | Lotus Approach alternate dBASE index | |
| Up | ||
| Ext | Description | Goto Shareware |
| .P | Progress database source code | |
| .P | Applause picture file | |
| .P | Pascal language source code file | |
| .P | Rea-C-Time application parameter file (ReaGeniX code generator) | |
| .P10 | Tektronix Plot 10 drawing | |
| .P12 | Personal Information Exchange | |
| .P16 | ProTracker Studio 16 music (16 channels) | |
| .P22 | Patch22 patch file | |
| .P65 | PageMaker 6.5 document | |
| .P7 | Xv's visual schnauzer format | IM |
| .P7C | Digital ID file used in Outlook Express Mime: application/pkcs7-mime | |
| .PA1 | PageAhead worktable | |
| .PAB | Personal Address Book | |
| .PAC | Atari STAD bitmap image | MAC: GC Various: XNV |
| .PAC | Proxy AutoConfig Mime: application/x-ns-proxy-autoconfig | |
| .PAC | SBStudio II package or song | |
| .PAD | Telemate keypad definition | |
| .PAG | Visual Basic property PAGe file | |
| .PAINT | Apple Macintosh MacPaint bitmap image | |
| .PAK | PK-Pak archive | |
| .PAL | Color PALette file used by eg. Dr. Halo | |
| .PAN | CorelDraw printer-specific file (copy to coreldrw.ink) | |
| 386SPART.PAR | Windows swapfile | |
| .PAR | Fractint parameter file | |
| .PAR | Digitalk PARTS application | |
| .PAR | Windows 3.x permanent output file | |
| .PART | Partial Go!Zilla download | |
| .PAS | Pascal language source code file (Pascal/Delphi) Notepad | MV |
| .PAT | CorelDRAW PATtern File | |
| .PAT | Gimp PATtern | Various: XNV |
| .PAT | PATch file | |
| .PAT | Bitmap image (1bit) (Patent data) (US Patent and Trademark Office) | |
| .PAT | Hatch PATterns (AutoCAD/Photostyler) | |
| .PAT | Polygon Attribute Table (link geographic locations to databases) | |
| .PAT | Gravis Ultrasound sound patch | |
| .PB | FAXability Plus fax | |
| .PB | WinFax Pro PhoneBook | |
| .PB | Proboard configuration files | |
| .PB | PixBase setup file | |
| .PB1 | First Publisher for Windows document | |
| .PBA | Powerbasic BASIC language source code file (Genus) | |
| .PBD | Phone book (FaxNOW!/Faxit) | |
| .PBI | Powerbasic include file (Genus) | |
| .PBI | Profiler Binary Input (Ms Source Profiler) | |
| .PBK | MSN PhoneBooK | |
| .PBL | Powerbasic library (Genus) | |
| .PBM | Poskanzer's Portable BitMap image Mime: image/x-portable-bitmap | IM, IV, JIR, LVP, PSP MAC: GC Various: XNV |
| .PBM | Planar bitmap image (XLib) | |
| .PBO | Profiler Binary Output (Ms Source Profiler) | |
| .PBT | Profiler Binary Table (Ms Source Profiler) | |
| .PC | Text file containing IBM PC specific info Notepad | |
| .PC1 | Atari Degas & Degas Elite bitmap image, see .PI1 | |
| .PC2 | Atari Degas & Degas Elite bitmap image, see .PI1 | |
| .PC3 | Atari Degas & Degas Elite bitmap image, see .PI1 | |
| .PC3 | Harvard Graphics 3.0 custom palette | |
| .PC8 | Ascii text IBM8 character set (NewWave Write) | |
| .PCB | Print Shop Deluxe business card? | |
| .PCB | P-CAD database | |
| .PCC | Zsoft PC Paintbrush cutout picture bitmap image | see .PCX |
| .PCD | Kodak PhotoCD bitmap image Mime: image/x-photo-cd | ACD, GWS, IM, IV, JIR (read only), PSP, PV, SB, TP, TVP |
| .PCF | Profiler Command File (Ms Source Profiler) | |
| .PCH | PatCH file | |
| .PCH | Ms C/C++ precompiled header | |
| .PCJ | Multimedia authoring tool graphics (IBM's Linkaway-Live) | |
| .PCK | Turbo Pascal PiCKfile | |
| .PCL | Hewlett Packard Printer Control Language Notepad | SB, FV |
| .PCP | Bitmap image (PCP file) | |
| .PCS | Animated PICTs (Macintosh) | |
| .PCS | Picture package (Ms PowerPoint/Ms ClipArt Gallery) | |
| .PCT | Macintosh QuickDraw PiCT bitmap image (b&w PICT1 - color PICT2) | IM, JIR, PSP, QVP, SB, TVP Various: XNV |
| .PCW | PC Write text document | |
| .PCX | Zsoft's PC Paintbrush bitmap image, uses RLE compression Paintbrush, Imaging | ACD, GWS, FMV, IM, IV, JIR, LVP, PSP, PV, SB, TP, TVP MAC: GC Various: XNV |
| .PDA | Bitmap image | |
| .PDB | Data (TACT/Packrat) | |
| .PDD | Adobe PhotoDeluxe Home Edition Image | |
| Adobe Portable Document Format A reader can be found at their homepage Mime: application/pdf | IM, FV | |
| Database Interchange Format (PCAD) | ||
| Graphics file (ED-SCAN 24bit format) | ||
| Package Definition File (download info) (Microsoft SMS) | ||
| Print device information (Netware) | ||
| .PDG | Print Shop Deluxe bi-fold? | |
| .PDL | Print Shop Deluxe flyer? | |
| .PDL | Project Description Language file (Borland C++ 4.5) | |
| .PDR | Virtual device? | |
| .PDS | Space mission data (Planetary Data System Format by NASA) | |
| .PDS | Pldasm language source code file (hardware assembly) | |
| .PDV | Paintbrush printer driver | |
| .PDW | Professional Draw document | |
| .PDX | Index file of .PDF | FMV (ODBC needed) |
| .PDX | PageMaker printer description | |
| .PE4 | Browser file generated by iPhoto Plus Explorer 4.0 from ULead Systems Inc | |
| .PEB | Program Editor Bottom overflow file (WordPerfect Library) | |
| .PED | Program Editor Delete save (WordPerfect Library) | |
| .PEM | Program Editor Macro (WordPerfect Library) | |
| .PEQ | Program Editor print Queue file (WordPerfect Library) | |
| .PER | Program Editor Resident area (WordPerfect Library) (vakioalue) | |
| .PES | Program Editor work Space file (WordPerfect Library) | |
| .PET | Macintosh PICT image | |
| .PET | Program Editor Top overflow file (WordPerfect Library) | |
| .PEX | Proboard EXecutable program file | |
| .PF | Archive? | SE |
| .PFA | Type 3 font file (unhinted PostScript font) | |
| .PFB | Postscript Font Bezier (Adobe Type 1 Font) | |
| .PFC | PF Component | |
| .PFC | First Choice text file | |
| .PFK | Programmable Function Keys (XTreePro) | |
| .PFL | Lotus Freelance PortFoLio file | |
| .PFM | Printer Font Metrics (Windows Adobe Type 1 font metric file) | |
| .PFS | First Publisher ART files | GWS |
| .PFS | Database (PFS:FILE) - text file (PFS:Write) | |
| .PFT | ChiWriter printer font | |
| .PFX | Personal Information Exchange | |
| .PG | Page cut/paste file (IBM LinkWay) | |
| .PGD | PGPdisk Volume | |
| .PGI | Printer Graphics File device driver (PGRAPH library) | |
| .PGL | HPGL vector image | QVP |
| .PGM | Portable GrayMap image Mime: image/x-portable-graymap | IM, IV, JIR, LVP, PSP MAC: GC Various: XNV |
| .PGM | Program (Signature) | |
| .PGP | Pretty Good Privacy encrypted file | |
| .PGR | PGP Groups | |
| .PGS | Manual page (man4dos) | |
| .PGX | Visual Basic binary property page file | |
| .PH | Geoworks optimized .goh include file | |
| .PH | Perl Header file | |
| .PH | Ms C/C++ phrase-table | |
| .PHD | PolyHedra Database | |
| .PHM | Phone book (DN - Lync) | |
| .PHN | PHoNe list (UltraFax/QmodemPro) | |
| .PHN | PhoneFree Internet Telephone | |
| .PHO | PHOne database (Metz Phone for Windows) | |
| .PHP | PhotoDeluxe PhotoParade Album | |
| .PHR | LocoScript PHRases | |
| .PI1 | Atari Degas & Degas Elite bitmap image | Various: XNV |
| .PI2 | Atari Degas & Degas Elite bitmap image, see .PI1 | |
| .PI3 | Atari Degas & Degas Elite bitmap image, see .PI1 | |
| .PIC | PC Paint/Pictor bitmap image | GWS, JIR (read only), PSP, PV, QVP MAC: GC Win & Mac: QT Various: XNV |
| .PIC | Macintosh QuickDraw bitmap image (b&w PICT1 - color PICT2) | IM |
| .PIC | Lotus PIC vector image | |
| .PIC | SoftImage image | ACD Various: XNV |
| .PIC | MTV & Rayshade bitmap image | Various: XNV |
| .PIC | Handy Scaner Cameron image? | Various: XNV |
| .PIC | Pegasus | |
| .PIC | Atari STAD bitmap image? See .PAC | |
| .PIC | Bitmap image (PIXAR picture file) | |
| .PICIO | Bitmap image (PIXAR picture file) | |
| .PICS | Animated PICT files (Macintosh) | |
| .PICT | Macintosh QuickDraw PiCT bitmap image (b&w PICT1 - color PICT2), see .PCT | |
| .PICT2 | Apple Macintosh PICT bitmap image | |
| .PID | Process ID file (Unix) | |
| .PIF | Program Information File (Shortcut to DOS program used in Windows) | |
| .PIF | Graphics metafile (OS/2) | |
| .PIF | Vector image GDF format (IBM mainframe computers) | |
| .PIM | Pascal text mode image file (Ultimate Draw) | |
| .PIN | Atari ST graphics format | |
| .PIN | Game data (Epic Pinball) | |
| .PIT | Compressed Macintosh file archive (PackIt) | |
| .PIX | Truevision Targa bitmap image, see .TGA | |
| .PIX | Alias bitmap image (24bit RGB RLE), see .ALS | |
| .PIX | Bitmap image (Inset Systems format) | |
| .PIXAR | PIXAR bitmap image | |
| .PJ | Bitmap image (HP PaintJet PCL graphics file) | |
| .PJ | CA-SuperProject ProJect | |
| .PJP | JPEG image Mime: image/jpeg | |
| .PJPEG | JPEG image Mime: image/jpeg | |
| .PJT | FoxPro additional (FPT) project description file | |
| .PJT | ProJecT (Rational Rose/Visual C++) | |
| .PJX | FoxPro main (DBF) project description file | |
| .PJXL | Bitmap image (HP PaintJet XL PCL graphics file) | |
| .PK | Packed bitmap font file (TeX DVI drivers) | |
| .PKA | PKArc compressed file archive | |
| .PKG | Next installer script | |
| .PKG | PacKaGe (AppleLink/Ms Developer Studio) | |
| .PKG | P-CAD database | |
| .PKR | PGP Public KeyRing | |
| .PKT | Fidonet message PacKeT | |
| .PKT | Readable contents of .pk (TeX font) | |
| .PL | PerL script language source code file Mime: application/x-perl | |
| .PL | Harvard Graphics PaLette | |
| .PL | ProLog language source code file | |
| .PL | Property List font metric file (TeX) | |
| .PL1 | 3D Home Architect room plan | |
| .PL3 | Harvard Graphics 3.0 chart palette | |
| .PLB | Library (FoxPro/P-CAD) | |
| .PLC | Lotus 1-2-3 add-in file (functions - macros - applications) | |
| .PLC | P-CAD database | |
| .PLD | PhotoDeLuxe PhotoLine Document | |
| .PLG | Ms Developer Studio build log | |
| .PLL | CA Clipper prelinked library | |
| .PLN | WordPerfect for Win spreadsheet | |
| .PLOT | Vector image (Unix Plot(5) format) | |
| .PLS | Playlist file | WA |
| .PLT | HPGL Plotter vector image | GWS |
| .PLT | PaLeTte | |
| .PLT | Page Magic paper format | |
| .PLT | Clipper 5 pre-linked transfer file | |
| .PLT | Software PLaTform file (Geoworks Glue, EPOC) | |
| .PLT | CA Clipper table for .pll | |
| .PLY | Polygon mesh format ZipPack by Silicon Graphics | |
| .PLY | PopMail data | |
| .PLY | Harvard Spotlight presentation screen | |
| .PM | X Windows system PixMap bitmap image (8bit text), see XPM | |
| .PM | Presentation Manager bitmap image | |
| .PM | Perl Module | |
| .PM3 | PageMaker 3 document | |
| .PM4 | PageMaker 4 document | |
| .PM5 | PageMaker 5 document | |
| .PM6 | PageMaker 6 document | |
| .PMA | Archive format used on CP/M & MSX computers | |
| .PMA | Performance Monitor data | |
| .PMC | Performance Monitor data | |
| .PMC | A4TECH Scanner image | |
| .PMI | OS/2 Program Manager Information | |
| .PML | Performance Monitor data | |
| .PMM | Amaris BTX/2 program file | |
| .PMR | Performance Monitor data | |
| .PMW | Performance Monitor data | |
| .PN3 | Harvard Graphics 3.0 printer device driver | |
| .PNF | Bitmap image (Portable Network graphics Frame) (standalone stream) | |
| .PNF | Precompiled setup information (Windows) | |
| .PNG | Bitmap image (Portable Network Graphics), like GIF but royalty-free Mime: image/x-png | ACD, GWS, IM, IV, JIR, PSP, PV, SB, TP, TVP Win & Mac: QT Various: XNV |
| .PNM | Portable aNyMap image Mime: image/x-portable-anymap | IM, IV, PSP Various: XNV |
| .PNT | MacPaint bitmap image, black & white, PackBits compressed, see .MAC | |
| .PNT | PoiNTlist segment (FTN software) | |
| .PNT | Qwk reader PoiNTer file (MarkMail 2.x) | |
| .PNT | Vector PoiNT data (ARC format) | |
| .PNTG | MacPaint bitmap image, B&W, see .MAC | |
| .POH | Geoworks optimized .goh include file | |
| .POL | InnovMetric Software POLygon 3D Models Format | |
| .POO | INITeX string pool | |
| .POP | PopMail messages index | |
| .POP | Pop-up menu object (dBASE Application Generator) | |
| .POT | Ms PowerPoint template | QVP |
| .POT | Fractint continuous potential image | |
| .POV | POV-Ray (Persistence Of Vision Raytracing) 3D object | AT |
| .POW | PowerChords instrument or song file | |
| .PP | Compressed Amiga file archive (PowerPacker) | |
| .PP4 | Picture Publisher bitmap image | |
| .PPA | Ms PowerPoint add-in | |
| .PPB | Button bar for Print Preview (WordPerfect for Win) | |
| .PPD | PostScript Printer Description file (PageMaker) | |
| .PPK | Archive (using for many distributives) (PPK) | |
| .PPL | Polaroidpaletteplus ColorKey device driver (Harvard Graphics 3.0) | |
| .PPM | PBM Portable PixelMap bitmap image Mime: image/x-portable-pixmap | IM, IV, JIR, LVP, PSP MAC: GC Various: XNV |
| .PPO | CA Clipper 5.x preprocessor output | |
| .PPP | PagePlus Publication | |
| .PPS | Ms PowerPoint Slide show Mime: application/vnd.ms-powerpoint | |
| .PPS | Personal Producer Storyboard | |
| .PPT | Ms PowerPoint presentation | QVP |
| .PR | Sun Icon or Cursor? | Various: XNV |
| .PR1 | Packrat 4.0 data file | |
| .PR2 | Packrat 4.x data file | |
| .PR2 | Aldus Persuasion 2.x presentation | |
| .PR2 | dBASE IV printer driver | |
| .PR3 | dBASE IV Postscript printer driver | |
| .PR3 | Aldus Persuasion 3.x presentation | |
| .PRC | Rational Rose processes | |
| .PRD | PRinter Driver (many) | |
| .PRE | Lotus Freelance PREsentation | QVP |
| .PRE | CMYK bitmap image (Stork format) | |
| .PRE | Settings (Programmer's WorkBench/Ms C/C++) | |
| .PRF | Pixel Run Format bitmap image (Improces/Fastgraph) | |
| .PRF | CheckIt Pro 1.0 data file | |
| .PRF | dBASE IV printer driver | |
| .PRF | Profiler output | |
| .PRG | PRoGram source (dBASE IV/FoxPro/CA Clipper/dBFast) | |
| .PRG | Atari program | |
| .PRI | LocoScript printer definitions | |
| .PRJ | PRoJect file used in programming environments | |
| .PRJ | Autodesk 3D Studio PRoJect file | PT |
| .PRM | PaRaMeters | |
| .PRN | Usually PRiNter output file | |
| .PRN | Printer driver (Signature) | |
| .PRN | Text file (Lotus 1-2-3/Symphony) | |
| .PRO | Configuration file (PROfile) used by several programs | |
| .PRO | Graphics profile file (DOS) | |
| .PRO | Prolog language source code file | |
| .PROJ | Project File (Interface Builder) (NeXT) | |
| .PRP | Movie | |
| .PRP | Rational Rose model properties | |
| .PRR | The Perfect Resume data file | |
| .PRS | Lotus Freelance PReSentation for OS/2 | |
| .PRS | Norton Viewer DLL | |
| .PRS | Harvard Graphics presentation | |
| .PRS | WordPerfect for Win printer resource eg. fonts | |
| .PRS | dBASE IV procedure | |
| .PRT | Ms Schedule+ PRinT | |
| .PRT | P-CAD component | |
| .PRT | PTC Pro/ENGINEER part | |
| .PRT | Dr.Halo printer driver | |
| .PRV | Backup file | |
| .PRVKR | PGP PRiVate KeyRing | |
| .PRX | FoxPro compiled program | |
| .PRZ | Freelance | QVP |
| .PS | Adobe PostScript Interpreted (text/graphics) Notepad, Ghostview Mime: application/postscript | IM (Ghostscript needed) |
| .PS2 | Adobe Level II PostScript document (text/graphics) | IM (Ghostscript needed) |
| .PSA | Archive (Pretty Simple Archive) (GNU PSA.OUT) | |
| .PSD | Adobe PhotoShop bitmap image | ACD, GWS, IV, JIR, PSP, PV, SB, TP, TVP MAC: GC Various: XNV |
| .PSD | Periscope Debugger definition file | |
| .PSE | Bitmap image (IBM printer Page SEgment) | |
| .PSEG | Bitmap image (IBM printer Page SEGment) | |
| .PSF | Outline PostScript printer font (ChiWriter) | |
| .PSID | Postscript Image Data (text/graphics) Notepad | |
| .PSM | Protracker Studio Module (sound) | |
| .PSM | Turbo Pascal symbol table of IDE | |
| .PSN | Sound Script presentation file | |
| .PSP | Paint Shop Pro file | IV, PSP |
| .PSP | Prodea Synergy procedure | |
| .PSS | PostScript Printer Stub | |
| .PST | Personal Storage File used by Ms Outlook for storing emails, contacts etc. | |
| .PST | Lahey Fortran paste buffer | |
| .PST | BMail postbox file | |
| .PT | Player Tools game crack | |
| .PT | Kodak Precition Color Management System | |
| .PT | Pitch Track sound | |
| .PT3 | Harvard Graphics 3.0 device driver | |
| .PT3 | PageMaker 3 template | |
| .PT4 | PageMaker 4 template | |
| .PT5 | PageMaker 5 template | |
| .PTB | PubTech BatchWorks script | |
| .PTL | Rational Rose 98 PeTaL | |
| .PTM | PubTech BatchWorks macro | |
| .PTM | Music format | |
| .PTM | Page Magic 2.0 template | |
| .PTR | Cursor image file (OS/2 PTR file) | |
| .PTR | Qwk reader pointer file (QMail) | |
| .PTU | Performer Terrain Utilities | |
| .PTX | Printronix bitmap image | |
| .PTY | Rational Rose 98 properties | |
| .PUB | Ms Publisher page template | |
| .PUB | Pretty Good Privacy public keyring | |
| .PUB | Publication (PageMaker/Ventura Publisher/1st Publisher) | |
| .PUBKR | PGP PUBlic KeyRing | |
| .PUT | Compressed file archive (PUT) | |
| .PUT | Graphics (WScan) | |
| .PUZ | Crossword | |
| .PUZ | Puzzle file (BrainsBreaker Puzzle) | |
| .PUZZ | Bitmap image (8bit) (X11 Puzzle) | |
| .PUZZLE | Bitmap image (8bit) (X11 Puzzle) | |
| .PV | Analysis data (Phase Vocorder) | |
| .PVD | Instalit script | |
| .PVG | Ms Encarta World Atlas Pushpins | |
| .PVL | Instalit library | |
| .PVT | Local Fidonet pointlist (FTN software) | |
| .PVU | Paleoenvironmental data (PaleoVu) | |
| .PW | Professional Write text document | |
| .PWD | Microsoft Pocket Word text document | |
| .PWL | Windows Password file | |
| .PWP | Professional WritePlus text document | |
| .PWZ | Ms PowerPoint wizard | |
| .PX | Paradox primary database index | |
| .PXL | Pixel data (TeX driver) | |
| .PXL | PiXCLscript script | |
| .PXL | Microsoft Pocket Excel spreadsheet | |
| .PXP | 3D Studio process file | |
| .PXR | 3D rendering file | |
| .PXR | Pixar bitmap image (Photoshop) | |
| .PY | Python script language source code file | |
| .PYC | Python script compiled source code | |
| .PZD | Pizazz Plus default settings | |
| .PZI | Pizazz Plus graphics | |
| .PZL | Bitmap image (8bit) (Unix Puzzle) | |
| .PZO | Pizazz Plus overlay | |
| .PZP | Pizazz Plus palette | |
| .PZS | Pizazz Plus settings | |
| .PZT | Pizazz Plus transfer file | |
| .PZX | Pizazz Plus swap file | |
| Up | ||
| Ext | Description | Goto Shareware |
| .Q | Win95 fax queue | |
| .Q0 | Japanese Q0 bitmap image (24bit) | |
| .Q3D | Quickdraw 3D file | PT |
| .QAD | PF QuickArt document | |
| .QAG | Norton Desktop Quick Access Group | |
| .QAP | Application (Omnis Quartz) | |
| .QBE | Saved query (Query By Example) (dBASE IV - Quattro Pro) | |
| .QBO | dBASE IV compiled query | |
| .QBW | QuickBooks for Windows spreadsheet | |
| .QCP | Digitally encoded voice (Qualcomm QCELP recoder and player) | |
| .QD0 | Omnis Quartz data file - segment 10 | |
| .QD1 | Omnis Quartz data file - segment 1 | |
| .QD2 | Omnis Quartz data file - segment 2 | |
| .QD3 | Omnis Quartz data file - segment 3 | |
| .QD3 | QuickDraw 3D metafile | |
| .QD3D | QuickDraw 3D metafile | |
| .QD4 | Omnis Quartz data file - segment 4 | |
| .QD5 | Omnis Quartz data file - segment 5 | |
| .QD6 | Omnis Quartz data file - segment 6 | |
| .QD7 | Omnis Quartz data file - segment 7 | |
| .QD8 | Omnis Quartz data file - segment 8 | |
| .QD9 | Omnis Quartz data file - segment 9 | |
| .QDAT | Quicktime for Windows install log datafile | |
| .QDK | Backup of startup files created by Optimize (QEMM) | |
| .QDV | Random Dot QDV bitmap image (8bit) | MAC: GC |
| .QEF | Query file (Q+E for Ms Excel) | |
| .QFC | Compressed file archive | |
| .QFX | Quick Link II fax file | MAC: GC |
| .QIC | Backup set (Ms Backup) | |
| .QIF | QuickTime Image | |
| .QLB | Quick LiBrary (BASIC PDS/Ms C/C++) | |
| .QLC | ATM Type 1 fonts script (Adobe Type Manager) | |
| .QLP | QuickLink Printer driver | |
| .QM4 | Options or services file (QMail 4.x Mail Door) | |
| .QPR | FoxPro generated query program | |
| .QPR | OS/2 print queue device driver | |
| .QPW | Quattro Pro 9 and 10, (Quattro Pro Workbook) | |
| .QPX | FoxPro compiled executable QBE query file | |
| .QRS | WordPerfect for Win Equation Editor support file | |
| .QRT | DKB & Qrt Ray-Tracer bitmap image, see .DIS | |
| .QRY | Lotus Approach query for SQL tables | |
| .QRY | dBASE IV query | |
| .QSN | QuickScan data (TapCIS) | |
| .QST | Ami Pro QuickStart Tutorial image | |
| .QT | Apple QuickTime movie, see also .MOV | AV |
| .QTC | QuickTime Conferencing | |
| .QTI | QuickTime image | QT |
| .QTIF | QuickTime image | QT |
| .QTK | QuickTake digital camera bitmap image | |
| .QTL | YUV SECAM or PAL image, see .YUV | |
| .QTM | Apple QuickTime Movie, see also .MOV | |
| .QTP | QuickTime Preferencies | |
| .QTS | QuickTime | |
| .QTV | Movie (QuickTime Virtual Reality) | |
| .QTVR | QuickTime VR | |
| .QTX | QuickTime Extension | |
| .QUE | Scheduler QUEue object | |
| .QWK | Qwk reader message file | |
| .QXD | QuarkXPress document | |
| .QXL | QuarkXPress element library | |
| .QXT | QuarkXPress template | |
| Up | ||
| Ext | Description | Goto Shareware |
| .R | Paradox file | |
| .R | Ratfor file (FORTRAN preprosessor) | |
| .R2D | Reflex 2 Data | |
| .R8 | Raw graphics (one byte per pixel) plane one (PicLab) | |
| .R8 | Red channel image data (24bit 3D animation) (Cubicomp PictureMaker) | |
| .R8P | Intellifont Pcl 4 bitmap font file | |
| .RA | RealAudio Mime: audio/x-pn-realaudio | CMW, IV, RP |
| .RA | Remote Access data file | |
| .RAD | Radiance image file | IM |
| .RAD | Reality AdLib Tracker 2-op FM music | |
| .RAM | RealMedia Mime: audio/x-pn-realaudio | CMW, RP |
| .RAR | Archive format. rar.exe | WC |
| .RAS | Sun Raster bitmap image, often used on UNIX Mime: image/x-cmu-raster | GWS, IV, JIR, PSP, PV, SB, TP, TVP Various: XNV |
| .RAST | Sun Raster bitmap image, often used on UNIX | |
| .RAT | RATS datafile | |
| .RAW | RAW grayscale/24-bit RGB bitmap image | PSP, TP |
| .RAW | RAW PCM sound | GW |
| .RAY | Rayshade | |
| .RBF | Rbase datafile | |
| .RBS | RealiMation 3D Object | AT |
| .RC | ResourCe script (Ms C, C++/Borland C++/Resource WorkShop) | |
| .RC | Emacs configuration record | |
| .RC2 | Ms Developer Studio not editable resources | |
| .RCG | Netscape newsgroup file (netsc.rcg) | |
| .RCT | Ms Developer Studio resource template | |
| .RD3 | Ray Dream Designer 3 graphics | |
| .RDEF | Geoworks UI resource file (old) | |
| .RDF | Compiled UIC source code (Geoworks UI Compiler) | |
| .RDI | Device independent bitmap file (RIFF RDIB format) | |
| .RDL | Paradox delivered report design | |
| .RDX | Reflex datafile | |
| .REC | Windows Macrorecorder macro | |
| .REC | EpiInfo datafile | |
| .REC | ARCSERVE archivation protocol | |
| .REC | Sprint record | |
| .RED | Rational Rose module diagram | |
| .RED | Clarion Modula-2 path info | |
| .REF | Cross-reference | |
| .REG | Registration information/key for W95 Register-editor (regedit.exe) | |
| .REM | REMarks | |
| .REP | REPort file made by several programs | |
| .REP | Qwk reader REPly file | |
| .REQ | REQuest | |
| .RES | Visual Basic RESource file | |
| .RES | Compiled resource (Ms C, C++/Borland C++) | |
| .RES | XBoard resign conferences file | |
| .RES | RESource | |
| .REV | Geoworks revision file | |
| .REX | Rexx language source code | |
| .REX | PharLab executable file (old format) | |
| .REX | Oracle report definition | |
| .REXX | Rexx language source code | |
| .REZ | Resource file | |
| .RF | Bitmap image (Raster File) | |
| .RF | RealFlash Clip | |
| .RFM | Rich music format | |
| .RFT | RFT-DCA = Revisable-Form Text Document Content Architecture by IBM (text file) (IBM DisplayWrite 4.0-5.1) | |
| .RG | Bitmap image (1bit B&W 4bit CMYK) (Raster Graphics format) | |
| .RGB | Silicon Graphics Raw Red, Green and Blue bytes bitmap image Mime: image/x-rgb | IM, IV Win & Mac: QT Various: XNV |
| .RGBA | Raw Red, Green, Blue and matte bytes | IM |
| .RGH | ZZ RouGH image? | Various: XNV |
| .RGX | Symbol tables etc. info (ReaGeniX code generator) | |
| .RH | Resource Header (Borland C++/Visual C++) | |
| .RI | Lotus 1-2-3 data | |
| .RIB | 3D Reality graphics (Renderman Interface Bytestream) | |
| .RIC | Ricoh fax | |
| .RIF | Recource Interchange File Format bitmap image | MAC: GC |
| .RIFF | Recource Interchange File Format bitmap image, see RIF | |
| .RIP | Remote Access graphics | |
| .RIP | Quincy program crash report | |
| .RIP | Telegrafx Remote Imaging Protocol (Maximus 3.0) | |
| .RIR | Spaceward Satori family native (Windows) | |
| .RIX | Bitmap image (RIX Softworks Paint Tool ColoRIX file) | |
| .RKV | RKIVE compressed file archive | |
| .RL4 | Bitmap image | |
| .RL8 | Bitmap image | |
| .RLA | Alias/Wavefront bitmap image | IM (read only) Various: XNV |
| .RLB | Alias/Wavefront bitmap image, see RLA | |
| .RLB | Harvard Graphics Win data | |
| .RLC | Bitmap image (Run Length RLC file) | |
| .RLC | Image Systems image | |
| .RLD | Norton Commander 5.0 temporary file | |
| .RLE | Run Length Encoded bitmap image, Compuserve or Windows, see also .BMP | ACD, GWS, IM (read only), IV, JIR, PSP, QV, SB, QVP, TVP MAC: GC |
| .RLE | Utah raster bitmap image | Various: XNV |
| .RLZ | Realizer source code file (CA-Realizer) | |
| .RM | RealMedia Mime: audio/x-pn-realaudio | CMW, RP |
| .RMF | Beatnik Rich Music Format | |
| .RMI | MIDI-sequention music (RIFF RMID format), see also .MID | CMW, IV, WA |
| .RMK | Makefile (CA Clipper RMake) | |
| .RMM | RealMedia audio (RealPlayer) Mime: audio/x-pn-realaudio | CMW |
| .RMP | RealAudio audio file | |
| .RN | Xpl program (Nota Bene) | |
| .RND | AutoCAD Autoshade rendering slide | |
| .RND | PGP Random Seed | |
| .RNG | Nokia Communicator ringing tone | |
| .RNK | Dial-up shortcut | |
| .RNO | Runoff file (VAX) | |
| .RNX | RealPlayer audio | |
| .ROFF | Unformatted manual page (Roff/nroff/troff/groff) | |
| .ROL | Adlib syntesized music (Roland) | |
| .ROM | Read Only Memory image (emulators/AONs) | |
| .ROT | Rotater 3D image | |
| .ROV | Rescure Rover game data | |
| .RP | RealPix image | |
| .RPB | CP Backup report | |
| .RPD | RapidFile database | |
| .RPF | AutoCAD pattern | |
| .RPGM | Portable Image | Various: XNV |
| .RPL | Document (Replica) | |
| .RPL | RePLy message | |
| .RPM | RealAudio plugin | CMW |
| .RPM | SuSE Linux package | |
| .RPPM | Portable Image | Various: XNV |
| .RPT | Crystal RePorTs for Visual Basic | |
| .RPT | RePorT file | |
| .RS | Data file (Amiga Resource/Reassembler) | |
| .RS_ | Resource fork of a Macintosh file (Mac-ette) | |
| .RSA | PKCS7 signature, MD5 + RSA | |
| .RSC | Compiled ReSourCe(s) | |
| .RSG | Compiled resource header (EPOC) | |
| .RSK | Risk project (RiskMan) | |
| .RSL | PC Tools for Win ReSource Library | |
| .RSL | Paradox saved report design | |
| .RSP | ReSPonse file | |
| .RSRC | ReSouRCe | |
| .RSS | Resource source file (EPOC) | |
| .RT | Rich Text | |
| .RTF | Rich Text Format document Wordpad Mime: application/rtf | FMV, QV, QVP |
| .RTFD | RTF-Packet (NeXT) | |
| .RTL | Bitmap image (HP Raster Transfer Language) (HP colour printers) | |
| .RTL | Norton Utilities runtime library | |
| .RTL | Text file | |
| .RTP | Software update file (.RTPatch) | |
| .RTS | CA-Realizer runtime library | |
| .RTS | Remote Ridicule Sound | |
| .RTX | Text document (MIME Richtext format) | |
| .RUL | Rules (Echo-conference) | |
| .RUN | PC Tools for Win batch file | |
| .RUS | Russian text | |
| .RV | RealVideo video | |
| .RVW | ReVieW | |
| .RWS | Borland C++ Resource Workshop Symbol file | |
| .RWX | Criterion RenderWare script/extruded text? | |
| .RWX | MEME Shape File | |
| .RXD | Reflex datafile | |
| Up | ||
| Ext | Description | Goto Shareware |
| .S | Assembly language source code file.S for cpp (Unix) | |
| .S | Foreign assembly source file (Modula-3) | |
| .S | MultiEdit macro source file | |
| .S | Scheme language source code file | |
| .S$$ | Sprint temporary sort file | |
| .S1K | S1000 Simnet format | |
| .S3I | Sample file (Digiplayer/ST3) | |
| .S3M | Scream Tracker III music (16 channels) | WA |
| .SAF | Spatial Archive Interchange Format | |
| .SAIF | Spatial Archive Interchange Format | |
| .SAL | SORITEC datafile | |
| .SAM | Document (Samna/Lotus Ami, Ami Pro) | FMV, QV, QVP |
| .SAM | SAMple file try Notepad | |
| .SAR | SAR compressed file archive | |
| .SAS | SAS source code file (VMS) | |
| .SAV | SAVed backup/configuration data | |
| .SAV | SAVed game situation (eg. NetHack) | |
| .SB | Audio file (Signed Byte) | |
| .SBD | Storyboard Editor data file | |
| .SBI | Creative Labs Sound Blaster Instrument | |
| .SBK | Emu SoundFont Bank (AWE32 Bank) (Convert (c) Villena) | |
| .SBK | Toolbook (Asymetrix ToolBook) | |
| .SBL | Stonu Brook Pascal library | |
| .SBP | Dml program (Superbase 4) | |
| .SBR | Source Browser support file | |
| .SBT | Suberbase 4 Windows notes related to record | |
| .SC | Paradox PAL script | |
| .SC | Framework II display driver | |
| .SC? | ColoRIX, EGA Paint | |
| .SC2 | Ms Schedule+ 7.x export | |
| .SC3 | Renamed dBASE III screen mask file (dBASE IV) | |
| .SC3 | Harvard Graphics 3.x screen device driver | |
| .SCA | SCA datafile | |
| .SCAN | Thunderscan image file | |
| .SCC | MSX (= MicroSoft eXtended home computer) bitmap image | |
| .SCD | SCoDL film recorder (SCODL = Scan Conversion Object Description Language) | |
| .SCD | Ms Schedule+ 7.x contacts | |
| .SCENE | Sculpt 3D/4D 3D object (Amiga) | AT |
| .SCF | Windows Explorer Shell Command File | |
| .SCF | ScoreMaker multimedia show | |
| .SCF | Symphony spelling checker configuration | |
| .SCG | Bitmap image (ColoRIX) | |
| .SCH | Project schedule (Schedule Publisher/Ms Schedule+) | |
| .SCH | Scheme (P CAD/Orcad) | |
| .SCI | Scitex Continuous Tone (CT2T) bitmap image | |
| .SCI | Fax (SciFax) | |
| .SCI | System Configuration Information | |
| .SCM | Lotus ScreenCam Movie | |
| .SCM | Scheme language source code file | |
| .SCN | Calgari trueSpace2 File Format | PT |
| .SCN | Minolta SCeNe file | PT |
| .SCN | Kermit screen dump or file | |
| .SCO | SCOre (best results in games) | |
| .SCODL | Bitmap image (Agfa slide file) | |
| .SCP | Dial-Up Networking Script Notepad | |
| .SCP | ColoRIX bitmap image | |
| .SCP | BITCOM script | |
| .SCR | Windows SCReensaver (executable) | |
| .SCR | DOS Debug SCRipt | |
| .SCR | SCReen snapshot (Microsoft Screen Capture format) | |
| .SCR | Bitmap image (ColoRIX or Sun rasterfile) | |
| .SCR | Fax image | |
| .SCR | Forth screen (source) file | |
| .SCR | LocoScript screen font | |
| .SCR | Script (1st Reader/Kermit/TeleMate/AutoCAD) | |
| .SCT | SciTex Continuous Tone bitmap image | PSP MAC: GC |
| .SCT | FoxPro additional (FPT) screen description file | |
| .SCU | ColoRIX bitmap image | |
| .SCX | ColoRIX bitmap image | MAC: GC |
| .SCX | Chart (Stanford Chart) | |
| .SCX | FoxPro main (DBF) screen description file | |
| .SCY | ReaGeniX security file | |
| .SCZ | Wingz data | |
| .SD | Sound (Entropic Sound Data format) | |
| .SD0 | Dali Raw image? | Various: XNV |
| .SD1 | Dali Raw image? See .SD0 | |
| .SD2 | Dali Raw image? See .SD0 | |
| .SDA | Software Distribution Network file archive description | |
| .SDB | Sidekick database | FMV |
| .SDF | Source Definition File (Sourcer) | |
| .SDF | System Data Format file (fixed lenght ascii text) | |
| .SDI | Super Data Interchange | |
| .SDI | Software Distribution Network Info file | |
| .SDK | Roland S-550/S-50/W-30 Disk Image | |
| .SDL | Parsys hardware network description file | |
| .SDL | Alias Wavefront Scene Description Language | |
| .SDL | SmartDraw Library | |
| .SDML | Spatial Data Modeling Language (VRML) by Silicon Graphics | |
| .SDN | Software Distribution Network compressed file archive (pak251.exe) | |
| .SDP | IBM Storyboard PIC image | |
| .SDP | RealAudio Scalable Multicast | |
| .SDR | Sounder music | |
| .SDR | SmartDraw drawing | |
| .SDS | MIDI Sample sound (DUMP Standard File) | GW |
| .SDT | SmartDraw Template | |
| .SDTS | Spatial Data Transfer Standard | |
| .SDW | Amidraw vector image | QVP |
| .SDX | Sample DUMP Exchange File | |
| .SEA | StuffIT Expander archive format (Macintosh) | SE Mac: SE |
| .SEC | Diskreet encrypted file | |
| .SEC | Pretty Good Privacy secret key ring file | |
| .SEC | Disney Animation Studio secured animation file | |
| .SEP | Tagged Image File Format (TIFF) bitmap image, see .TIF | |
| .SEP | Printer separator page | |
| .SEQ | Atari STAD bitmap image/animation? See .PAC | |
| .SEQ | Bubble Chamber Sequential Instruction File | |
| .SES | Clarion Modula-2 session info | |
| .SET | SETup data or info | |
| .SET | 1st Reader configuration | |
| .SET | Symphony driver sets created by Install | |
| .SEU | Serials 2000 update file | |
| .SF | Signature instructions file | |
| .SF | IRCAM Sound File (CSound package/MixView sound sample editor) | |
| .SF | WPS attribute storage (OS/2 WorkPlace Shell) | |
| .SF2 | E-mu SoundFont | |
| .SFB | HP soft font | |
| .SFF | Scene File Format | |
| .SFI | SIS Framegrabber image | |
| .SFI | Printer font (HP LaserJet landscape) (Ventura Publisher) | |
| .SFL | PCL 4 bitmap font (landscape) (Intellifont/Ventura Publisher) | |
| .SFN | SPX font | |
| .SFO | Bitstream font file - fontware format | |
| .SFP | Pcl 4 bitmap font (portrait) (Intellifont/Ventura Publisher) | |
| .SFS | Pcl 5 scalable font file (Intellifont) | |
| .SFT | ChiWriter screen font | |
| .SFW | Seattle Film Works graphics | IV |
| .SFX | Self-extracting file archive script (RAR) | |
| .SG1 | Graphics (Stanford Graphics) | |
| .SGD | Lahey Blackbeard help file | |
| .SGF | Starwriter document with graphics | |
| .SGI | Silicon Graphics workstation, Irix RGB bitmap image | GWS, IM, IV MAC: GC Win & Mac: QT Various: XNV |
| .SGM | IETF SGML document (Standard Generalized Markup Language) | |
| .SGML | IETF SGML document (Standard Generalized Markup Language) | |
| .SGP | STATGRAPHICS Plus statistics | |
| .SGT | Save/get keyboard macro (Signature) | |
| .SGX | Lahey Fortran help file index | |
| .SH | SHell script (Unix sh or bash) (ASCII) | |
| .SH3 | Harvard Graphics 3.0 presentation | |
| .SHAR | SHell ARchive script (Unix) | |
| .SHB | W95 shortcut to a document | |
| .SHB | CorelShow background/presentation | |
| .SHD | Metatools' Bryce Support file (Materials catalogue) | |
| .SHD | W95 spool file | |
| .SHF | PGP Share | |
| .SHG | Segmented HyperGraph bitmap image | |
| .SHK | ShrinkIt compressed Apple II file archive | |
| .SHM | SHell Macro (WordPerfect Library) | |
| .SHN | SHorteN compressed audio file, no loss of quality as occurs with .MP3, but they are larger. They usually should be uncompressed first, but can also be played 'on-the fly' Here you can find a good FAQ and some .SHN-software for many platforms | |
| .SHP | Image Format | Mac: GC |
| .SHP | SHaPe file (ESRI GIS & Mapping software) Here you'll find a .SHP to .AGF (and backwards) converter | |
| .SHP | Printmaster icon library | |
| .SHP | AutoCAD shape file and source file for text fonts | |
| .SHR | Unix Shell Archive (ASCII) (SHAR) | |
| .SHS | W95 shell scrap object | |
| .SHTML | SSI-HTML (SSI=Server-Side Include): dynamic HTML page | |
| .SHW | Presentation (Harvard Graphics/CorelShow) | QVP |
| .SHX | AutoCAD shape entities | |
| .SI | SoftImage image, see also .PIC | |
| .SID | C64 tunes and sound effects file (PlaySID) | |
| .SIF | Setup Installation File | |
| .SIF | Vector data (ISIF format) | |
| .SIG | SIGnature file (ThunderByte AntiVirus/PopMail/PGP) | |
| .SIG | Current program settings (Signature) | |
| .SIK | Ms Word backup file (SIcherungsKopie) | |
| .SIM | SIMPLE script source (Telix) | |
| .SIR | Bitmap image (Solitaire file) | |
| .SIS | Psion software installation file | |
| .SIT | StuffIT Expander archive format, often used on the Macintosh Mime: application/x-stuffit | SE Mac: SE |
| .SIX | Bitmap image (DEC LN03+ Sixel file) | |
| .SIXEL | Bitmap image (DEC LN03+ Sixel file) | |
| .SKCARD | Starfish SideKick datafile | |
| .SKR | PGP private (secret) keyring | |
| .SKY | Multiplan SYLK spreadsheet file | |
| .SL | S-Lang language source code file | |
| .SLB | Autodesk Autocad Slide Library | |
| .SLB | Symbols library (P-CAD) | |
| .SLC | Telix compiled SALT script | |
| .SLD | Autodesk Autocad Slide | |
| .SLI | Slide (MAGICorp Slide Service) | |
| .SLK | SYLK data format (SYmbolic LinK) (Excel/MultiPlan) | |
| .SLL | Sound file | |
| .SLP | Pro/E render file | PT |
| .SLT | Salt Script Application Language script source (Telix) | |
| .SM | SoftSpoken Mailer maillist | |
| .SM | ScriptMaker script | |
| .SM | Smalltalk language source code file | |
| .SM | Samna Word text document | |
| .SMC | File for a Nintendo emulator On this page you can find some more info about this, including some emulators | |
| .SMF | SMARTFAX fax | |
| .SMI | Lotus SMartIcon | |
| .SMM | Ami Pro macro | |
| .SMN | Font (ParaGraph's WorkScript format) | |
| .SMP | SaMPleVision sound | GW |
| .SMT | Smart Ware II text file | |
| .SN | Sound Club Editor compressed song file | |
| .SND | Raw/Sun/NeXT/Tandy/Apple Macintosh sound (old formats) Mime: audio/basic | AV, CMW, GW, IV, QVP |
| .SNG | Song (midi sound) (Midisoft Studio/Prism) | |
| .SNM | Netscape folder cache for it's e-mail client? | |
| .SNO | Snobol4 language source code file | |
| .SNP | Access 97 report SNaPshot file | |
| .SNP | Book-shelf for .BOO (READIBM) | |
| .SNP | Output video format from Computer Eyes equipment | |
| .SO | Fortran 90 shared object | |
| .SOL | MATRA prelude solids | |
| .SOL | Solution eg. game walkthroughs | |
| .SOM | Quattro Pro network serial numbers | |
| .SOM | Paradox sort information | |
| .SON | SBStudio II song | |
| .SOU | SBStudio II sound data | |
| .SP | Splint compressed file archive | |
| .SPA | SPAnish documentation try Notepad | |
| .SPC | Bitmap image (Atari compressed Spectrum file) | Mac: GC |
| .SPC | Ms Multiplan program | |
| .SPC | SNES Audio (music) | |
| .SPC | WordPerfect for Win temporary file | |
| .SPC | Text to speech | |
| .SPD | Printer driver | |
| .SPD | Scalable font (Speedo) (Harvard Graphics 3.0) | |
| .SPF | Bitmap image (SPiFf= Still Picture Interchange File Format), like JFIF's JPEG, but more features | |
| .SPF | EnerGraphics slide presentation file | |
| .SPG | Sprint glossary | |
| .SPH | Sphere | |
| .SPIFF | Bitmap image (SPIFF= Still Picture Interchange File Format), like JFIF's JPEG, but more features | |
| .SPK | Spark compressed file archive (Acorn) | |
| .SPL | Shockwave Flash Object Mime: application/futuresplash | |
| .SPL | Splint compressed file archive | |
| .SPL | Customized printer driver (Sprint) | |
| .SPL | Personal spell dictionary (Signature) | |
| .SPL | SamPLe | |
| .SPL | Spool file (Windows 3.x printing) | |
| .SPM | WordPerfect data | |
| .SPOT | SPOT satellite bitmap image | |
| .SPP | Sprint printer file | |
| .SPR | Sizzler animation | |
| .SPR | Sprint document letter | |
| .SPR | FoxPro generated executable screen file | |
| .SPR | Spreadsheet (Psion Series 3) | |
| .SPR | Sprite (graphics image) (many - Story Board) | |
| .SPRITE | Sizzler animation | |
| .SPS | SPSS language source code file (VAX/VMS) | |
| .SPS | Screen driver (Sprint) | |
| .SPT | Data support file (MITAC disk/system management utility pack) | |
| .SPT | Spitbol language source code file | |
| .SPT | SPliT (one part of multi-part file) | |
| .SPT | Support file (MITAC disk/system management utility pack) | |
| .SPU | Atari compressed Spectrum bitmap image | MAC: GC Various: XNV |
| .SPW | SigmaPlot worksheet | |
| .SPX | FoxPro compiled executable screen file | |
| .SPX | Screensaver (Screen Peace) (Windows) | |
| .SQD | Squish message base | |
| .SQI | Squish message base index | |
| .SQL | SQL report or query | |
| .SQL | Squish message base last read pointers | |
| .SQZ | Squeeze Compressed file archive (Unix) | WZ |
| .SR | Bitmap image (Sun Rasterfile) | |
| .SRB | Corel's Word Perfect Suite Clipart Scrapbook Index | |
| .SRC | SouRCe (DataFlex/Multi-Edit) | |
| .SRF | TerraGen SuRFace map (landscape renderer) | |
| .SRF | Bitmap Image (Sun Raster File) | |
| .SRG | PowerPoint 8.0 Auto-Content Wizard Self-ReGistration data file | |
| .SRFMAP | TerraGen SuRFace MAP (landscape renderer) | |
| .SRP | QuickLink script | |
| .SS | Splash bitmap image | |
| .SS | Screen Saver (DN) | |
| .SSD | Datafile (SAS/PC) | |
| .SSF | Enable spreadsheet | QVP |
| .SSH | Secure Shell document (DataFellows) | |
| .SSI | HTML with server side includes | |
| .SSM | RealAudio Standard Streaming Metafile | |
| .SSP | SAS Transport datafile | |
| .SSQ | ODBC script | |
| .SST | Satellite image data (AVHRR file) (IDIDAS/SSTMAP/IMGMAP) | |
| .ST | Scream Tracker instrument library | |
| .ST | Little Smalltalk language source code file | |
| .ST | NeoPaint stamp | |
| .STA | Statistica data file | |
| .STA | Reflection 4.0 saved state | |
| .STA | Spinmaker Plus stack | |
| .STB | STuB library (Genus GX Kernel) | |
| .STD | STanDard (something...) (LocoScript) | |
| .STD | State Transition Diagram graphics file (Prosa) | |
| .STEP | ISO-10303 STEP product data | |
| .STF | ShrinkToFit compressed file archive | |
| .STL | STereoLithography 3d object | AT, PT |
| .STM | Scream Tracker II music (4 channels) | WA |
| .STM | State Transition Diagram model file (Prosa) | |
| .STO | Pascal stub OBJ file (Genus GX Kernel) | |
| .STP | ISO-10303 STEP product data | |
| .STR | Gate3 table structure file | |
| .STR | Structure list object file (dBASE Application Generator) | |
| .STS | Ms C/C++ project status info | |
| .STS | Scream Tracker song format | |
| .STW | SmartTerm for Windows data file | |
| .STX | SmarText electronic book | |
| .STX | Music format | |
| .STX | Tax form (CA-Simply Tax) | |
| .STY | STYle library or sheet used by many text and graphics programs, eg. by Ami Professional as template | QV |
| .SUB | Rational Rose component package | |
| .SUI | Suit library (Simple User Interface Toolkit) | |
| .SUL | Gfa Raytrace image? | Various: XNV |
| .SUM | SUMmary | |
| .SUN | Bitmap image (Sun raster file format), often used on UNIX, see also .RAS | IM, IV, PV, TP MAC: GC Various: XNV |
| .SUNIFF | Bitmap image (Sun TAAC Image File Format), see .VFF | |
| .SUP | Bitmap image (Startup screen) | |
| .SUP | WordPerfect for Win SUPplementary dictionary | |
| .SVD | Document autosave file (Ms Word) | |
| .SVF | Vector image (Simple Vector Format), used by CAD programs | |
| .SVG | Ms Word glossary autosave file | |
| .SVQ | Music file | |
| .SVR | Compressed virtual world for WWW | |
| .SVS | Ms Word style sheet autosave file | |
| .SVX | Sound (Amiga 8SVX format) | |
| .SW | Audio file (signed word) | |
| .SWA | Macromedia Shockwave music (MPEG-1 Layer III with special header) | |
| .SWF | ShockWave Flash, Animated Vector Format used on the Net Here's a plug-in Mime1: application/x-shockwave-flash Mime2: application/futuresplash | IV, RP |
| .SWG | SWAG Pascal Snippets file (SWAG Reader) | |
| .SWP | Windows 95 SWaP file | |
| .SWP | Sprint document backup | |
| .SWT | Visual Basic Setup Wizard Template file | |
| .SXP | 3D Studio process file | |
| .SY1 | Smartpix symbol library (Ami Pro) | |
| .SY3 | Harvard Graphics 3.x SYmbol file | QVP |
| .SYD | Backup file made by QEMM/SysEdit Notepad | |
| .SYK | SYLK spreadsheet format (Excel) | |
| .SYLK | SYLK spreadsheet format (Excel) | |
| .SYM | Lotus Freelance SYMbol library | |
| .SYM | Graphics symbols (Harvard Graphics 2.x/Ms Windows SDK) | |
| .SYM | P-CAD component symbols | |
| .SYM | Borland C++ precompiled headers | |
| .SYM | Program symbol table (many compilers and linkers) | |
| .SYN | Bitmap image (SDSC Synu image file) | |
| .SYN | Ms Word 5 synonym file | |
| .SYNU | Bitmap image (SDSC Synu image file) | |
| .SYS | System file - device driver or hardware configuration info (DOS) | |
| .SYS | Datafile (SYGRAPH/SYSTAT/SPSS/PC) | |
| .SYW | Graphics symbols (Harvard Graphics Win) | |
| .SYW | Yamaha SY-85/SY-99 Wave File |
Thanks to Jouni for allowing me to add his giant extension database to this list and WhatFormat
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