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File Extensions Files end in a "dot" and a two, three, or four letter file extension. The file extension tells you what type of file it is, what program uses that extension, and is used by your operating system to launch the appropriate program. Select the first letter of the extension to jump to the appropriate section. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z $ ~ 0 1 2 3 4 8 9 FTP - J - JAS - Graphic JFF - JFIF - JPEG File Interchange Format JIF - JPEG Image Format - Graphic JOB - Job file PROGRAM NAME: BETA 44 JOR - Journal file SQL JPG - JPEG - Joint Photography Experts Group - Graphic JT - JT Fax JTF - JPEG graphic JW - Text file PROGRAM NAME: JUSTWRITE JWL - Text file Library PROGRAM NAME: JUSTWRITE JZZ - Spreadsheet file PROGRAM NAME: JAZZ Back to Top - K - KBD - Keyboard layout PROGRAM NAME: IRMA WORKSTATION FOR WINDOWS KBM - Keyboard layout KDC - Kodak Photo Enhancer KEX - Profile file PROGRAM NAME: KEDIT KEY - Keyboard macros KFX - PROGRAM NAME: Kofax KYB - Keyboard layout Back to Top - L - L - LEX Program File L - Link instructions L - LISP Program File LAB - Mailing Labels PROGRAM NAME: Q+E For MS EXCEL LAY - Word chart layout PROGRAM NAME: APPLAUSE LBG - Label generator PROGRAM NAME: DBASE IV LBL - label PROGRAM NAME: dBASE IV / dBFAST / CLIPPER 5 LBM - Bitmap graphic PROGRAM NAME: DELUXE PAINT LBO - Ordered Labels PROGRAM NAME: DBASE IV LBR - screen driver PROGRAM NAME: LOTUS 1-2-3 LBR - Compressed Archive File PROGRAM NAME: LU LBT - Label Memo PROGRAM NAME: FOXPRO LBX - Label PROGRAM NAME: FOXPRO LCF - Linker Control File PROGRAM NAME: NORTON GUIDES LCN - Dictionary file PROGRAM NAME: WORDPERFECT LD - Long Distance codes PROGRAM NAME: TELIX LD1 - Overlay file PROGRAM NAME: dBASE LDB - Locked DataBase file PROGRAM NAME: Microsoft Access LEG - Document PROGRAM NAME: Legacy LES - LESson PROGRAM NAME: Learn LEX - Dictionary file PROGRAM NAME: Lexicon LFT - LaserPrinter Font PROGRAM NAME: CHIWRITER LGO - MS Windows Logo Driver PROGRAM NAME: MS WINDOWS LHA - A DOS Compressed file lha - PC/Amiga compression format PROGRAM NAME: LHA Expander or MacLHA lhs - Literate Haskell Source file LHW - Compressed Archive File Amiga PROGRAM NAME: LHWARP lhz - LHA compression file LIB - Program Library - diverse Programmer's Language LIC - License file PROGRAM NAME: Shareware programs LIF - Compressed Archive File LIF - Logical Interchange Format - Data file PROGRAM NAME: Hewlett-Packard LIN - Line Art PROGRAM NAME: AUTOCAD LJ - Text file for HP LJ II Printer LNK - Linker file LOG - Log file LRF - Linker Response File PROGRAM NAME: MS C/C++ LRS - Language Resource File PROGRAM NAME: WORDPERFECT FOR WINDOWS LSP - LISP Program File PROGRAM NAME: XLISP LST - LiST File on Installation disks PROGRAM NAME: MS-DOS LWP - Document PROGRAM NAME: Lotus Word Pro LZH - Compressed Archive File PROGRAM NAME: LHA / LHARC LZS - Compressed Archive File PROGRAM NAME: LHARC lzs - PC/Amiga compression format LZW - Compressed Archive File Amiga PROGRAM NAME: LHWARP Back to Top - M - M - Function PROGRAM NAME: MATLAB M - Macro Sourcecode PROGRAM NAME: BRIEF M - PROGRAM NAME: MATHEMATICA M3 - ModuleA 3 Program File M3D - 3D Animation PROGRAM NAME: Corel MA3 - Macro PROGRAM NAME: HARVARD GRAPHICS 3.0 MAC - Bitmap Graphic PROGRAM NAME: MACPAINT MAC - Macro MAF - Microsoft Access Form MAK - Make file MAK - Project file PROGRAM NAME: VISUAL BASIC MAM - Microsoft Access Macro MAN - Manual MAP - Colorpalette MAP - Format Data PROGRAM NAME: MICROGRAFX PICTURE PUBLISHER MAP - Linker Map file MAQ - Microsoft Access Query MAR - Microsoft Access Report MAS - Master data definition PROGRAM NAME: FOCUS MAT - Microsoft Access Table MAT - PROGRAM NAME: MATLAB MAX - MAX Program File MB - Memo Holder for Database PROGRAM NAME: PARADOX MBK - Multiple index Backup PROGRAM NAME: DBASE IV MBX - Message Base PROGRAM NAME: Eudora MCC - Configuration PROGRAM NAME: MATHCAD MCD - Document PROGRAM NAME: MATHCAD MCF - Font PROGRAM NAME: MATHCAD MCI - MCI Command Set MCP - Printer driver PROGRAM NAME: MATHCAD MCS - MathCAD format MCW - Text file PROGRAM NAME: WORD For MACINTOSH MD - Compressed Archive File PROGRAM NAME: MDCD MDB - Database PROGRAM NAME: MS ACCESS MDM - Modem definition PROGRAM NAME: TELIX MDX - Multiple Index PROGRAM NAME: DBASE IV ME - ASCII Text file MEB - Macro Editor bottom overflow file PROGRAM NAME: WORDPERFECT MED - Macro Editor delete save PROGRAM NAME: WORDPERFECT MEM - Macro Editor macro PROGRAM NAME: WORDPERFECT MEM - Memory file of Variables PROGRAM NAME: dBASE IV / FOXPRO MEQ - Macro Editor print queue PROGRAM NAME: WORDPERFECT MER - Macro Editor resident area PROGRAM NAME: WORDPERFECT MES - Macro Editor work space PROGRAM NAME: WORDPERFECT MET - Macro Editor top overflow file PROGRAM NAME: WORDPERFECT MET - Meta file MEU - Menu PROGRAM NAME: MS DOS Shell MEX - Executable file PROGRAM NAME: MATLAB MF - MetaFont Text file MFF - MIDI File Format MGF - Font PROGRAM NAME: Micrografx Draw MI - Miscellaneous MIC - Microsoft Image Composer MID - MIDI File PROGRAM NAME: MS WINDOWS MIF - MIDI Instrument MIFF - PROGRAM NAME: ImageMagick MIL - Group 4 MIME - Multipurpose Internet Mail Extension MIX - Object file PROGRAM NAME: POWER C MK - Makefile MKE - Makefile PROGRAM NAME: MS WINDOWS SDK MLB - Macro Library PROGRAM NAME: SYMPHONY, FOXPRO MME - MIME encoded file MMF - Microsoft Mail File MMM - Animation PROGRAM NAME: Macromind MND - Menu Program File PROGRAM NAME: AUTOCAD MNT - Menu memo PROGRAM NAME: FOXPRO MNU - Menu PROGRAM NAME: AUTOCAD / NORTON COMMANDER MNX - compiled menu file PROGRAM NAME: AUTOCAD MNX - Menu PROGRAM NAME: FOXPRO MOB - Device definitions PROGRAM NAME: PEN WINDOWS MOD - Audio file PROGRAM NAME: Amiga, PC, and Macintosh MOD - ModuleA-2 Program File MOD - Windows Kernel Module MOV - Movie PROGRAM NAME: QuickTime MOZ - Mozilla cache file PROGRAM NAME: Netscape MP - PROGRAM NAME: Multiplan MPC - Calender PROGRAM NAME: Microsoft Project MPD - Mini port driver MPE - MPEG - MPEG animation file MPG - MPEG Animation MPM - MathPlan Macro PROGRAM NAME: WORDPERFECT MPNT - Macintosh MacPaint MPP - Project file PROGRAM NAME: Microsoft Project MPR - Program PROGRAM NAME: FOXPRO MPT - Template file PROGRAM NAME: Microsoft Project MPV - View PROGRAM NAME: Microsoft Project MPX - Export file PROGRAM NAME: Microsoft Project MPX - Compiler Menu PROGRAM NAME: FOXPRO MRB - Multiple Resolution Bitmap Graphic PROGRAM NAME: MS C/C++ MRK - Markup PROGRAM NAME: Informative Graphics MRS - Macro resource file PROGRAM NAME: WORDPERFECT FOR WINDOWS MS - Checksum file for Anti-Virus PROGRAM NAME: MS-DOS MSG - Message Text file in ASCII format MSN - Microsoft Network document MSP - Black-and-White Bitmap Graphic PROGRAM NAME: Microsoft Paint\Paintbrush MST - Minispecification PROGRAM NAME: PROSA MST - Setup script PROGRAM NAME: MS WINDOWS SDK MSW - Text file PROGRAM NAME: MS WORD MTH - Math PROGRAM NAME: DERIVE MTW - Data file PROGRAM NAME: MINITAB MU - Menu PROGRAM NAME: QUATTRO PRO MUS - Music file MVB - Database PROGRAM NAME: Microsoft Multimedia Viewer MVF - Stop frame file PROGRAM NAME: AUTOCAD AUTOFLIX MVI - Movie command file PROGRAM NAME: AUTOCAD AUTOFLIX MXT - PROGRAM NAME: MS C MYS - Saved game file PROGRAM NAME: Myst Back to Top - N - NB - Text file PROGRAM NAME: NOTA BENE NCD - Norton Change Directory PROGRAM NAME: NORTON COMMANDER NDX - Index PROGRAM NAME: dBASE / dBFAST NET - Network Configuration PROGRAM NAME: HARVARD GRAPHICS FOR WINDOWS / PARADOX NEW - New info NG - Online-Documentation PROGRAM NAME: NORTON GUIDE NLM - Program PROGRAM NAME: NetWare NLS - National language support - Code Page NOT - Notes PROGRAM NAME: IBM BOOKMANAGER NST - Amima MOD Audio file NTF - Notes PROGRAM NAME: IBM BOOKMANAGER NTF - Notes Template File PROGRAM NAME: Lotus Notes NTS - Tutorial PROGRAM NAME: NORTON NTX - Index PROGRAM NAME: CLIPPER 5 NWS - Info Text file (latest news) (ASCII) Back to Top - O - O - Object file PROGRAM NAME: UNIX O$$ - Outfile PROGRAM NAME: SPRINT OAB - Outlook Address Book PROGRAM NAME: Microsoft Outlook OAZ - Fax OBD - Binder PROGRAM NAME: Microsoft Office OBJ - Object Module OCX - Object Linking and Embedding (OLE) Control Extension OFF - Object File Format PROGRAM NAME: Vector Graphic OFM - Font PROGRAM NAME: Adobe OLB - Object Linking and Embedding (OLE) Object Library OLE - Object Linking and Embedding Object OLD - Backup OLI - Text file PROGRAM NAME: Olivetti ONX - Onyx Graphics Postershop OPC - Job file PROGRAM NAME: BETA 44 OPT - Optimize PROGRAM NAME: QEMM OPX - Organization diagram PROGRAM NAME: MS ORGCHART ORI - Original OUT - Output file OV1 - Program file PROGRAM NAME: Overlay OV2 - Program file PROGRAM NAME: Overlay OV3 - Program file PROGRAM NAME: Overlay OVL - Program Module file PROGRAM NAME: Overlay OVR - Program Module file PROGRAM NAME: Overlay OZM - Memo bank PROGRAM NAME: Sharp Organizer OZP - Telephone bank PROGRAM NAME: Sharp Organizer Back to Top - P - P - PASCAL Program File P - Picture PROGRAM NAME: APPLAUSE P10 - Tektronix Plot10 PAB - Personal Address Book PAD - Keypad definition PROGRAM NAME: TELEMATE PAK - game data PROGRAM NAME: Quake PAK - Compressed Archive File PROGRAM NAME: PAK PAL - Color palette PAR - Parameter file PROGRAM NAME: FRACTINT PAS - PASCAL Program File PAT - Hatch-Pattern PROGRAM NAME: AUTOCAD PAT - Vector-Pattern PROGRAM NAME: COREL DRAW PBI - Profiler Binary Input PROGRAM NAME: MS SOURCE PROFILER PBK - Phonebook PBM - Portable Bit Map Graphic PBO - Profiler Binary Output PROGRAM NAME: MS SOURCE PROFILER PBT - Profiler Binary Table PROGRAM NAME: MS SOURCE PROFILER PC - Text file - IBM PC specific PC3 - Custom palette PROGRAM NAME: HARVARD GRAPHICS 3.0 PC8 - ASCII Text IBM-8 PCD - Photo-CD Image PCF - Profiler Command File PROGRAM NAME: MS SOURCE PROFILER PCH - Patch File PCH - PreCompiled Header PROGRAM NAME: MS C/C++ PCK - pick file PROGRAM NAME: TURBO PASCAL PCL - Printer Control Language data file PROGRAM NAME: HP LaserJet Printer PCM - LaserJet cartridge information PROGRAM NAME: HP LaserJet Printer PCS - Animation PROGRAM NAME: PICS PCT - Bitmap Graphic PROGRAM NAME: PC Paint PCW - Text file PROGRAM NAME: PC WRITE PCX - Bitmap Graphic Zsoft format PROGRAM NAME: PC Paintbrush, Paint, Zsoft PDB - PROGRAM NAME: TACT PDF - Portable Document Format PROGRAM NAME: Adobe Acrobat Reader PDG - PROGRAM NAME: PrintShop Deluxe PDI - PROGRAM NAME: MS POWERPOINT PDR - Printer driver PDR - Port driver PDS - PDS Graphic PDV - Printer driver PROGRAM NAME: PAINTBRUSH PEB - Program Editor bottom overflow file PROGRAM NAME: WORDPERFECT PED - Program Editor delete save PROGRAM NAME: WORDPERFECT PEM - Program Editor macro PROGRAM NAME: WORDPERFECT PEQ - Program Editor print queue file PROGRAM NAME: WORDPERFECT PER - Program Editor resident area PROGRAM NAME: WORDPERFECT PES - Program Editor work space file PROGRAM NAME: WORDPERFECT PET - Program Editor top overflow file PROGRAM NAME: WORDPERFECT PF - Profile - Monitors, Printers PFA - Type 1 font - ASCII format PFB - Type 1 font - Encrypted format PFK - Programmable function keys PROGRAM NAME: XTREE PRO PFM - Postscript Font Metric or Printer Font Metric - Type 1 font PFT - Printer Font PROGRAM NAME: CHIWRITER PGL - 7475A plotter PROGRAM NAME: Vector Graphics PGM - Portable Gray Map graphic PGP - PROGRAM NAME: PRETTY GOOD PRIVACY PH - PERL Header PH - Phrase-table PROGRAM NAME: MS C/C++, MS HELP COMPILER PHTML - HTML document with PreProcessing Instructions - (PPIs) PIC - PICT - Bitmap graphic format, or PIXAR picture file PICT - PICT2 - QuickDraw vector format bitmapped images PROGRAM NAME: Macintosh QuickDraw PIF - Program Information File PROGRAM NAME: MS WINDOWS PIT - Compressed Archive File Macintosh PROGRAM NAME: PACKIT PIX - Inset Systems graphic PJT - Project memo PROGRAM NAME: Visual FoxPro PJX - Project file PROGRAM NAME: Visual FoxPro PKA - Compressed Archive File PROGRAM NAME: PKARC pkg - AppleLink package compression format PROGRAM NAME: StuffIt Expander PL - Palette PROGRAM NAME: HARVARD GRAPHICS FOR WINDOWS PL - PERL Program File PL3 - Chart Palette PROGRAM NAME: HARVARD GRAPHICS 3.0 PLB - Library PROGRAM NAME: FOXPRO PLC - Add-In PROGRAM NAME: LOTUS 1-2-3 PLN - Spreadsheet file PROGRAM NAME: WORDPERFECT FOR WINDOWS PLT - HPGL Plotter file Vector graphic PROGRAM NAME: AUTOCAD PM - PageMaker Graphic PM3 - Document PROGRAM NAME: PAGEMAKER 3 PM4 - Document PROGRAM NAME: PAGEMAKER 4 PM5 - Document PROGRAM NAME: PAGEMAKER 5 PN3 - Printer driver PROGRAM NAME: HARVARD GRAPHICS 3.0 PNG - Portable Network Graphics bitmap PNG - Paint Shop Pro Browser file PROGRAM NAME: Paint Shop Pro PNM - Portable aNy Map Graphic PNT - Macintosh painting POP - Popup Menu PROGRAM NAME: dBASE POV - Persistence Of Vision raytracer PP - Compressed Archive File Amiga PROGRAM NAME: POWERPACKER PPA - PowerPoint Add-in PROGRAM NAME: Microsoft PowerPoint PPD - PostScript Printer Description PPL - PolaroidPalettePlus ColorKey Driver PROGRAM NAME: HARVARD GRAPHICS 3.0 PPM - Portable Pixel Map graphic PPO - Preprocessor output PROGRAM NAME: CLIPPER 5 PPS - PowerPoint Slideshow PROGRAM NAME: Microsoft PowerPoint PPT - PowerPoint presentation PROGRAM NAME: Microsoft PowerPoint PR2 - Printer driver PROGRAM NAME: DBASE IV PR2 - Presentation PROGRAM NAME: ALDUS PERSUASION 2.0 PR3 - PostScript Printer driver PROGRAM NAME: DBASE IV PRD - Printer driver PROGRAM NAME: Microsoft Word, Word Perfect, Works PRE - Preference Settings PROGRAM NAME: MS C/C++ PRF - Printer driver PROGRAM NAME: DBASE IV PRF - Profiler output PRG - Program file PROGRAM NAME: CLIPPER 5 / dBASE IV / dBFAST / FOXPRO PRJ - Project file PRM - Parameter PROGRAM NAME: Diverse PRN - Text file PROGRAM NAME: LOTUS 1-2-3 / SYMPHONY PRN - Temporary Print file PRN - Printer driver PROGRAM NAME: XyWrite PRO - PROLOG Program File PRS - Printer ReSource file for fonts PROGRAM NAME: WordPerfect PRS - procedure PROGRAM NAME: DBASE IV PRS -PROGRAM NAME: HARVARD GRAPHICS PRT - Printer Configuration PROGRAM NAME: IRMA WORKSTATION FOR WINDOWS PRT - Printer driver PROGRAM NAME: DR. HALO PRX - Compiler Program PROGRAM NAME: FOXPRO PS - PostScript - ASCII format PSF - PostScript Printer Font PROGRAM NAME: CHIWRITER PSM - Symbol table PROGRAM NAME: TURBO PASCAL PT3 - Device driver PROGRAM NAME: HARVARD GRAPHICS 3.0 PT3 - Template PROGRAM NAME: PAGEMAKER 3 PT4 - Template PROGRAM NAME: PAGEMAKER 4 PT5 - Template PROGRAM NAME: PAGEMAKER 5 PUB - Public Key Ring PROGRAM NAME: PRETTY GOOD PRIVACY PUB - Publication PROGRAM NAME: Ventura Publisher, Microsoft Publisher PW - Text file PROGRAM NAME: PROFESSIONAL WRITE PWD - Pocket Word Document PROGRAM NAME: Microsoft PWL - Password List PWZ - Wizard PROGRAM NAME: Microsoft PowerPoint PX - Primer Database index PROGRAM NAME: PARADOX PXL - Pocket PROGRAM NAME: Microsoft Excel PY - PYTHON script PYC - Compiler PYTHON Script PZD - PROGRAM NAME: PIZAZZ PLUS PZO - PROGRAM NAME: PIZAZZ PLUS Back to Top - Q - QAG - Quick Access Group PROGRAM NAME: NORTON DESKTOP QBD - Keyboard layout PROGRAM NAME: IRMA WORKSTATION FOR WINDOWS QBE - Query By Example PROGRAM NAME: dBASE IV / QUATTRO PRO QBO - Ordered Query PROGRAM NAME: DBASE IV QBW - PROGRAM NAME: QuickBooks for Windows QDK - Memmory Manager PROGRAM NAME: Quarterdeck Qemm QEF - Query PROGRAM NAME: Q+E For MS EXCEL QEP - PROGRAM NAME: IRMA WORKSTATION FOR WINDOWS QLB - Quick Library PROGRAM NAME: MS C/C++ QLC - ATM font information QLC - PostScript Help file QPR - Relational Query PROGRAM NAME: FOXPRO QPR - driver for Printer queue PROGRAM NAME: OS/2 QPX - Ordered Query PROGRAM NAME: FOXPRO QRS - Equation Editor PROGRAM NAME: WORDPERFECT FOR WINDOWS QRT - QRT ray tracing Graphic QRY - Query PROGRAM NAME: DBASE IV, Microsoft qt - Movie, binary file type PROGRAM NAME: QuickTime QTM - Movie PROGRAM NAME: QuickTime Click our logo below to E-Mail us ComputerHelpOnline@angelfire.com