第1个回答 2006-03-03
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.nap naplps file (VideoShow) (EnerGraphics)
.nb text file (Nota Bene)
.nc graphics (netcdf)
.nc instructions for NC (Numerical Control) machine (CAMS)
.ncc CNC (Computer Numeric Control) control file (CamView 3D)
.ncd Norton Change Directory support file (Norton Commander)
.ndb network database (Intellicom - Compex)
.ndx index file (dBASE II - III - IV - dBFast)
.neo raster graphics (Atari Neochrome)
.net network configuration/info file
.new new info
.nfo info file
.ng online documentation database (Norton Guide)
.nlx form (FormWorx 3.0)
.np project schedule (Nokia Planner) (Visual Planner 3.x)
.npi source for DGEN.EXE intepreter (dBASE Application Generator)
.nst music (NoiseTracker)
.nts Tutorial (Norton)
.ntx index file (Clipper 5)
.nuf message for new users on their 1st call (Procomm Plus)
.nws info text file (latest news) (ASCII)
.nxt sound (NeXT format)
o
.o object file (unix - Atari - GCC)
.o$$ outfile (Sprint)
.oaz fax (NetFax Manager)
.obj object code (Intel Recolatable Object Module)
.obr object browser data file (Borland C++)
.obs script (ObjectScript)
.obv visual interface (ObjectScript)
.ocf Object Craft File (Object Craft)
.ocr incoming fax transcribed to text (FAXGrapper)
.ocx OLE custom control
.odl type library source (Visual C++)
.ofd form definition (ObjectView)
.off Object File Format vector graphics
.okt music (Oktalizer)
.olb object library (VAX)
.old backup file
.oli text file (Olivetti)
.oom swap file (Shroom)
.opn active options (Exact)
.opt Optimize support file (QEMM)
.opw organization chart (Org Plus for Windows)
.opx inactive options (Exact)
.org calendar file (Lotus Organizer)
.otl outline font description (Z-Soft Type Foundry)
.otx text file (Olivetti Olitext Plus)
.out output file
.ov1 overlay file (part of program to be loaded when needed)
.ov2 overlay file (part of program to be loaded when needed)
.ovd datafile (ObjectVision)
.ovl overlay file (part of program to be loaded when needed)
.ovr overlay file (part of program to be loaded when needed)
p
.p PASCAL source code file
.p Rea-C-Time application parameter file (ReaGeniX code generator)
.p picture file (APPLAUSE)
.p16 music (16 channels) (ProTracker Studio 16)
.p22 patch file (Patch22)
.pa1 worktable (PageAhead)
.pac STAD Image (graphics ?)
.pac package (SBStudio II)
.pad keypad definition (Telemate)
.pak compressed file archive created by PAK (pak251.exe)
.pal color palette
.pan printer-specific file (copy to coreldrw.ink) (CorelDRAW)
.par PARTS application (Digitalk PARTS)
.par parameter file (Fractint)
.par permanent output file (Windows 3.x)
.pas PASCAL source code file
.pat hatch patterns (AutoCAD - Photostyler)
.pat vector fill files (CorelDRAW)
.pb fax (FAXability Plus)
.pb phonebook (WinFax Pro)
.pb setup file (PixBase)
.pb1 document (First Publisher for Windows)
.pba PowerBASIC BASIC source code (Genus)
.pbd phone book (FaxNOW! - Faxit)
.pbi PowerBASIC include file (Genus)
.pbi Profiler Binary Input (MS Source Profiler)
.pbl PowerBASIC library (Genus)
.pbm PBM Portable Bit Map graphics
.pbm planar bitmap graphics (XLib)
.pbo Profiler Binary Output (MS Source Profiler)
.pbt Profiler Binary Table (MS Source Profiler)
.pc text file containing IBM PC specific info
.pc3 custom palette (Harvard Graphics 3.0)
.pc8 ASCII text IBM8 character set (NewWave Write)
.pcc cutout picture vector graphics (PC Paintbrush)
.pcd Kodak Photo-CD Image graphics (768x512) (hpcdtoppm)
.pcf Profiler Command File (MS Source Profiler)
.pch patch file
.pch precompiled header (MS C/C++)
.pcj multimedia authoring tool graphics (IBM's Linkaway-Live)
.pck pickfile (Turbo Pascal)
.pcl HP-PCL graphics data (HP Printer Control Language)
.pct bitmap graphics (Macintosh b&w PICT1 - color PICT2)
.pcw text file (PC Write)
.pcx bitmap graphics (PC Paintbrush)
.pda bitmap graphics
.pdb ----- (TACT)
.pdf graphics file (ED-SCAN 24bit format)
.pds PDS graphics
.pds PLDASM source code file (hardware assembly)
.pdv printer driver (Paintbrush)
.pdw document (Professional Draw)
.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 Program Editor top overflow file (WordPerfect Library)
.pfa Type 3 font file (unhinted PostScript font)
.pfb Type 1 font file
.pfc text file (First Choice)
.pfk programmable function keys (XTreePro)
.pfm Windows Type 1 font metric file
.pfs database (PFS:FILE) - text file (PFS:Write)
.pft printer font (ChiWriter)
.pgi Printer Graphics File device driver (PGRAPH library)
.pgm Portable Grayscale bitMap graphics
.pgm program (Signature)
.pgp support file (Pretty Good Privacy RSA System)
.pgs manual page (man4dos)
.ph PERL header file
.ph phrase-table (MS C/C++)
.phn phone list (UltraFax - QmodemPro)
.pho phone database (Metz Phone for Windows)
.phr phrases (LocoScript)
.pic PIXAR picture file (SDSC Image Tool)
.pic bitmap graphics (Macintosh b&w PICT1 - color PICT2)
.pic bitmap graphics (many eg. Lotus 1-2-3 - PC Paint)
.pif Program Information File (Windows 3.x)
.pif vector graphics GDF format (IBM mainframe computers)
.pit compressed Mac file archive created by PACKIT (unpackit.zoo)
.pix Alias image file (SDSC Image Tool)
.pj project (CA-SuperProject)
.pjt project memo (FoxPro)
.pjx project (FoxPro)
.pk PacKed bitmap font bitmap file (TeX DVI drivers)
.pka compressed file archive created by PKARC
.pkg installer script (Next)
.pkt FidoNet packet
.pl PERL source code file
.pl PROLOG source code file
.pl Property List font metric file (TeX)
.pl palette (Harvard Graphics)
.pl1 room plan (3D Home Architect)
.pl3 chart palette (Harvard Graphics 3.0)
.plb library (FoxPro)
.plc add-in file (functions - macros - applications) (Lotus 1-2-3)
.pll pre-linked library (Clipper 5)
.pln spreadsheet (WordPerfect for Win)
.plt HPGL plotter file vector graphics (AutoCAD)
.plt palette
.plt pre-linked transfer file (Clipper 5)
.ply ----- (PopMail)
.ply presentation screen (Harvard Spotlight)
.pm bitmap graphics (Presentation Manager)
.pm3 document (PageMaker 3)
.pm4 document (PageMaker 4)
.pm5 document (PageMaker 5)
.pmc graphics (A4TECH Scanner)
.pmm program file (Amaris BTX/2)
.pn3 printer device driver (Harvard Graphics 3.0)
.png Portable Network Graphics (PNG) bitmap graphics
.pnm PBM Portable aNy Map (PNM) graphics
.pnt Macintosh painting
.pnt QWK reader pointer file (MarkMail 2.x)
.pop messages index (PopMail)
.pop pop-up menu object (dBASE Application Generator)
.pov raytraced graphics image (Persistence Of Vision)
.pow chord chart (PowerChords)
.pp compressed Amiga file archive created by POWERPACKER
.ppb button bar for Print Preview (WordPerfect for Win)
.ppl PolaroidPalettePlus ColorKey device driver (Harvard Graphics 3.0)
.ppm Portable Pixel Map graphics
.ppo pre-processor output (Clipper 5)
.ppp publication (PagePlus)
.pps storyboard (Personal Producer)
.ppt general file extension (PowerPoint)
.pr2 presentation (Aldus Persuasion 2.x)
.pr2 printer driver (dBASE IV)
.pr3 PostScript printer driver (dBASE IV)
.pr3 presentation (Aldus Persuasion 3.x)
.prd printer driver (many)
.pre presentation (Freelance Graphics)
.pre settings (Programmer's WorkBench - MS C/C++)
.prf Pixel Run Format graphics (Improces - Fastgraph)
.prf printer driver (dBASE IV)
.prf profiler output
.prg program (Atari)
.prg program source (dBASE IV - FoxPro - Clipper 5 - dBFast)
.pri printer definitions (LocoScript)
.prj project
.prm parameters
.prn printer driver (Signature)
.prn text file (Lotus 1-2-3 - Symphony)
.pro PROLOG source code file
.pro graphics profile file (DOS)
.prs Printer Resource eg. fonts (WordPerfect for Win)
.prs presentation (Harvard Graphics Win)
.prs procedure (dBASE IV)
.prt printer driver (Dr.Halo)
.prx compiled program (FoxPro)
.ps PostScript file (text/graphics) (ASCII)
.pse bitmap graphics (IBM printer Page SEgment)
.psf outline PostScript printer font (ChiWriter)
.psm music (MASI - ProTracker)
.psm symbol table of IDE (Turbo Pascal)
.psp procedure (Prodea Synergy)
.pt3 device driver (Harvard Graphics 3.0)
.pt3 template (PageMaker 3)
.pt4 template (PageMaker 4)
.ptb script (PubTech BatchWorks)
.ptm macro (PubTech BatchWorks)
.ptr QWK reader pointer file (QMail)
.pub page template (MS Publisher)
.pub public key ring file (Pretty Good Privacy RSA System)
.pub publication (Ventura Publisher - 1st Publisher)
.pvd script (Instalit)
.pvl library (Instalit)
.pvt local Fidonet pointlist
.pw text file (Professional Write)
.pwp text document (Professional WritePlus)
.px primary database index (Paradox)
.py PYTHON script file
.pyc compiled PYTHON script file
.pzd default settings (Pizazz Plus)
.pzo overlay file (Pizazz Plus)
.pzp palette (Pizazz Plus)
.pzs settings (Pizazz Plus)
.pzt transfer file (Pizazz Plus)
.pzx swap file (Pizazz Plus)
q
.qag Quick Access Group (Norton Desktop)
.qap application (Omnis Quartz)
.qbe saved query (Query By Example) (dBASE IV - Quattro Pro)
.qbo compiled query (dBASE IV)
.qbw spreadsheet (QuickBooks for Windows)
.qd0 data file - segment 10 (Omnis Quartz)
.qd1 data file - segment 1 (Omnis Quartz)
.qd2 data file - segment 2 (Omnis Quartz)
.qd3 data file - segment 3 (Omnis Quartz)
.qd4 data file - segment 4 (Omnis Quartz)
.qd5 data file - segment 5 (Omnis Quartz)
.qd6 data file - segment 6 (Omnis Quartz)
.qd7 data file - segment 7 (Omnis Quartz)
.qd8 data file - segment 8 (Omnis Quartz)
.qd9 data file - segment 9 (Omnis Quartz)
.qdk backup of startup files created by Optimize (QEMM)
.qdv graphics (Steve Blackstock Giffer)
.qef query file (Q+E for MS Excel)
.qfx fax (QuickLink)
.qlb quick library (MS C/C++)
.qlc ----- (PostScript help file) atmfonts.qlc
.qlp printer driver (QuickLink)
.qm4 options or services file (QMail 4.x Mail Door)
.qpr generated query program (FoxPro)
.qpr print queue device driver (OS/2)
.qpx compiled query program (FoxPro)
.qrs Equation Editor support file (WordPerfect for Win)
.qrt QRT ray tracing graphics
.qry query (dBASE IV)
.qt QuickTime movie (animation)
.qwk QWK reader message file
.qxd document (QuarkXPress)
.qxl element library (QuarkXPress)
r
.r RATFOR (FORTRAN preprosessor) file
.r8 raw graphics (one byte per pixel) plane one (PicLab)
.r8p PCL 4 bitmap font file (Intellifont)
.rar compressed file archive created by RAR (rar1_402.exe)
.ras Sun Rasterfile graphics
.rat datafile (RATS)
.raw raw RGB 24-bit graphics
.rbf datafile (Rbase)
.rc Resource Compiler script (MS C/C++ - Borland C++)
.rc configuration (emacs)
.rdi device-independent bitmap file (RIFF RDIB format)
.rdx datafile (Reflex)
.rec datafile (EpiInfo)
.rec record file (Sprint)
.rec recorded macro file (Windows 3.x)
.red path info (Clarion Modula-2)
.ref cross-reference
.reg OLE Registration (Windows 3.x)
.reg registration (Corel programs)
.rem remarks
.rep QWK reader reply file
.rep report (Report Designer - CodeReporter - DataBoss)
.req request
.res compiled resource (MS C/C++ - Borland C++)
.res dBASE resources (dBASE IV)
.rex REXX source code file
.rez resource file
.rf Sun raster graphics
.rft DCA/RFT Revisable Format Text file (IBM DisplayWrite 4.0-5.1)
.rgb SGI RGB image file (SDSC Image Tool)
.rgx symbol tables etc. info (ReaGeniX code generator)
.ri ----- (Lotus 1-2-3)
.rib graphics in Renderman format (3DReality)
.ric fax (Ricoh)
.rif RIFF bitmap graphics (Fractal Design Painter)
.rip graphics (Remote Access)
.rix bitmap graphics (ColorRIX VGA Paint)
.rl4 bitmap graphics
.rl8 bitmap graphics
.rla Wavefront raster image file (SDSC Image Tool)
.rlb ----- (Harvard Graphics Win) hgw.rlb
.rlc graphics 1bit/pixel scanner output
.rle Utah Run Length Encoded raster graphic (SDSC Image Tool)
.rlz REALIZER source code file (CA-Realizer)
.rmi MIDI file (RIFF RMID format)
.rmk makefile (RMAKE)
.rn XPL program for Nota Bene users
.rnd Rendering Slide (AutoCAD AutoShade)
.rno runoff file (VAX)
.rol FM music Adlib Music File (Roland)
.rpd database (RapidFile)
.rpl text document (Replica)
.rpt report
.rs data file (Amiga Resource - Reassembler)
.rs_ resource fork of a Macintosh file (Mac-ette)
.rsc resource file (ViewMax - many)
.rsp responce file (text file containing input expected by eg. LINK)
.rtf Rich Text Format text file (many - Windows Word)
.rtf Windows Help file script
.rtl Run Time Library (NU 7.0)
.rtl text file
.rtp RTPatch software update package data file
.rts runtime library file (CA-Realizer)
.rvw Review
.rws Resource Workshop data file (Borland C++)
.rwx script (RenderWare)
s
.s ASSEMBLY source code file (unix)
.s SCHEME source code file
.s$$ temporary sort file (Sprint)
.s3m music (16 channels) (Scream Tracker 3.0)
.sal datafile (SORITEC)
.sam text file (Samna - Lotus Ami/Ami Pro)
.sav backup file (saved file)
.sav configuration
.sav saved game situation (eg. NetHack)
.sb audio file (signed byte)
.sbd storyboard (Storyboard Editor)
.sbi Sound Blaster Instrument file (Creative Labs)
.sbp DML program (Superbase 4)
.sbr support file (Source Browser)
.sbt notes related to record (Suberbase 4 Windows)
.sc PAL script (Paradox)
.sc display driver (Framework II)
.sc3 renamed dBASE III screen mask file (dBASE IV)
.sc3 screen device driver (Harvard Graphics 3.0)
.sca datafile (SCA)
.scc text file
.scd SCODL Scan Conversion Object Description Language graphics
.scf multimedia show (ScoreMaker)
.scf spelling checker configuration (Symphony)
.sch project schedule (Schedule Publisher)
.sch schematics file (ORCAD)
.sci fax (SciFax)
.scm SCHEME source code file
.scn screen file (Kermit)
.sco high score
.scp script (BITCOM)
.scr DEBUG source code file (DOS Debug)
.scr screen - screen snapshot (dBASE IV - Procomm Plus)
.scr screen font (LocoScript)
.scr screen saver (Windows 3.x)
.scr script (Kermit - 1st Reader)
.sct screen memo (FoxPro)
.scx bitmap graphics (ColorRIX)
.scx chart (Stanford Chart)
.scx screen (FoxPro)
.scy security file (ReaGeniX)
.sda Fidonet's Software Distribution Network file archive description
.sdf System Data Format file (fixed lenght ASCII text)
.sdi Software Distribution Network Info file
.sdn Software Distribution Network compressd file archive (pak251.exe)
.sea Self-Extracting compressed Macintosh file Archive
.sec secret key ring file (Pretty Good Privacy RSA System)
.sec secured animation file (Disney Animation Studio)
.seq Atari animation file
.seq Sequential Instruction File (Bubble Chamber)
.ses session info (Clarion Modula-2)
.set configuration (1st Reader)
.set driver sets created by Install (Symphony)
.set setup options file
.sf IRCAM Sound File (CSound package - MixView sound sample editor)
.sf WPS attribute storage (OS/2 WorkPlace Shell) wp_root.sf
.sfi graphics (SIS Framegrabber)
.sfi printer font (HP LaserJet landscape) (Ventura Publisher)
.sfl PCL 4 bitmap font (landscape) (Intellifont) (Ventura Publisher)
.sfn font (SPX)
.sfp PCL 4 bitmap font (portrait) (Intellifont) (Ventura Publisher)
.sfs PCL 5 scalable font file (Intellifont)
.sft screen font (ChiWriter)
.sg1 graphics (Stanford Graphics)
.sgf document with graphics (Starwriter)
.sgi graphics (IRIS - Silicon Graphics)
.sgp statistics (STATGRAPHICS Plus)
.sgt save/get keyboard macro (Signature)
.sh Unix shell script
.sh unix ASCII file archive created by SHAR (unshar.zip)
.sh3 presentation (Harvard Graphics 3.0)
.shb background (CorelShow)
.shg segmented-graphics bitmap
.shk compressed Apple II file archive created by SHRINKIT
.shm shell macro (WordPerfect Library)
.shp shape file and source file for text fonts (AutoCAD)
.shr unix ASCII file archive created by SHAR (unshar.zip)
.shw presentation (Harvard Graphics 2.0 - CorelShow)
.shw slide show (WordPerfect Presentations)
.shx shape entities (AutoCAD)
.sig current program settings (Signature)
.sig signature file (PopMail)
.sik backup file (Sicherungskopie) (MS Word)
.sit compressed Macintosh archive created by STUFFIT (unsit30.zip)
.sl S-Lang source code file
.slb slide library (AutoCAD)
.slc compiled SALT script (Telix)
.sld slide (AutoCAD)
.sli slide (MAGICorp Slide Service)
.slk SYLK Symbolic Link format data file (MultiPlan)
.sll sound data file
.slt SALT Script Application Language for Telix script source (Telix)
.sm SMALLTALK source code file
.sm maillist (SoftSpoken Mailer)
.sm script (ScriptMaker)
.sm text file (Samna Word)
.smf fax (SMARTFAX)
.smm macro (Ami Pro)
.smp sample (sound file)
.smt text file (Smart Ware II)
.snd digitized sound file (Macintosh/ATARI/PC)
.sng song (midi sound) (Midisoft Studio - Prism)
.sno SNOBOL4 source code file
.snp output video format from Computer Eyes equipment
.sol solution eg. game walkthroughs
.som network serial numbers (Quattro Pro)
.som sort information (Paradox)
.son song (SBStudio II)
.sou sound data (sound tool)
.sp compressed file archive created by SPLINT (unix)
.spc program (MS Multiplan)
.spc temporary file (WordPerfect for Win)
.spd scalable font (Speedo) (Harvard Graphics 3.0)
.spf slide presentation file (EnerGraphics)
.spg glossary (Sprint)
.spi graphics (Siemens and Philips scanner)
.spl compressed file archive created by SPLINT (splint.arc)
.spl customized printer driver (Sprint)
.spl personal spell dictionary (Signature)
.spl print spooling file (Windows 3.x)
.spl sample
.spm ----- (WordPerfect) wp{wp}.spm
.spp printer file (Sprint)
.spr document letter (Sprint)
.spr genarated screen program (FoxPro)
.spr sprite
.sps SPSSx source code file (VAX/VMS)
.sps screen driver (Sprint)
.spt ----- support file (MITAC disk/system management utility pack)
.spt SPITBOL source code file
.spw worksheet (SigmaPlot)
.spx compiled screen program (FoxPro)
.sql SQL data file
.sqz compressed file archive created by SQUEEZE (sqz1082e.exe)
.src source (DataFlex)
.srf Sun Raster File graphics
.srp script (QuickLink)
.ss bitmap graphics (Splash)
.ssd datafile (SAS/PC)
.ssp datafile (SAS Transport)
.st SMALLTALK source code file (Little Smalltalk)
.st instrument library (Scream Tracker)
.st stamp (NeoPaint)
.sta saved state (Reflection 4.0)
.sta stack (Spinmaker Plus)
.stb stub library (Genus GX Kernel)
.std State Transition Diagram graphic file (Prosa)
.std standard (something..) (LocoScript)
.stf compressed file archive created by SHRINKTOFIT
.stm State Transition Diagram model file (Prosa)
.stm music (Scream Tracker)
.sto pascal stub OBJ file (Genus GX Kernel)
.str structure list object file (dBASE Application Generator)
.sts project status info (MS C/C++)
.sts song format (Scream Tracker)
.stw ----- (SmartTerm for Windows)
.stx electronic book (SmarText)
.stx tax form (CA-Simply Tax)
.sty style library or sheet (many text and graphics programs)
.sui SUIT library (Simple User Interface Toolkit)
.sum Summary
.sun Sun rasterfile graphics
.sup supplementary dictionary (WordPerfect for Win)
.svd autosave file for document (MS Word)
.svg autosave file for glossary (MS Word)
.svs autosave file for style sheet (MS Word)
.sw audio file (signed word)
.swg SWAG packet (SWAG Reader)
.swp document backup (Sprint)
.swp swap file (DOS)
.sy1 SmartPix symbol library (Ami Pro)
.sy3 symbol file (Harvard Graphics 3.0)
.syd ----- backup of startup files created by QEMM (?) autoexec.syd
.sym precompiled headers (Borland C++)
.sym program symbol table (Power C - MS ILink incremental linker)
.sym symbol file (Harvard Graphics 2.0 - MS Windows SDK)
.syn SDSC Synu image file (SDSC Image Tool)
.syn synonym file (MS Word 5)
.sys datafile (SYGRAPH - SYSTAT - SPSS/PC)
.sys system file - d
第2个回答 2006-03-03
这个问题就象是在问地球现在具体有多少人一样~~人数总是在增长,说不清楚,也说不准~
基本上每一种新软件都有一个专用的扩展名
而且扩展名是可以更改的~
第3个回答 2006-03-03
假设是以前DOS时代,理论上有26*26*26=17576,那么多.
现在windows支持长扩展名,就好不说了.
第4个回答 2006-03-03
可以有无限多种。因为从windows时代开始扩展名的长度为256个字符。基本属于无限制了。常用的大概有几十种吧具体可以看windows的打开方式里
第5个回答 2006-03-03
这问题真牛!!!
有成百上千种!!!!!