http://en.wikipedia.org/wiki/List_of_file_formats_%28alphabetical%29 0 Compressed harddisk data DoubleSpace 0B Printer font with lineDraw extended character set PageMaker 001, 002, ... Split parts of a single whole file HJSplit 1 Fax 1 Fax many 1 Roff/nroff/troff/groff source for manual page cawf2.zip 123 Spreadsheet Lotus 1-2-3 version 9 - Lotus 1-2-3 version 97 15U Printer font with PI font set PageMaker 1ST Usually README.1ST text file 2GR 286 Grabber File Win 301 Fax Super FAX 2000 - Fax-Mail 96 386 Intel 80386 processor driver Windows 3.x 386 Windows virtual device driver Win 3DMF QuickDraw 3D Metafile QuickDraw 3DS 3D Studio Graphics format 3D Studio 3DT Database in which the meta-data of a 3D Topicscape is held 3D Topicscape 3FX Effect CorelChart 3GR 386 Grabber File Win 3GP Mobile Phone Video 3T4 Binary file converter to ASCII Util3 4C$ Datafile 4Cast/2 4MD Musical file 4SW 4DOS Swap File 4DOS 4TH FORTH source code file ForthCMP - LMI Forth 555 16 bit per pixel image file format (5bit per component) Sierra Entertainment 668 Music (the mixing is always at 12048 Hz) 669 Music (8 channels) The 669 Composer 6CM Music (6 Channel Module) Triton FastTracker 75 75x75 dpi display font Ventura Publisher 7z 7-Zipped file 8 A86 assembler source code file 85 85x85 dpi display font Ventura Publisher 8BF Adobe Photoshop compatibile filters/plugins 8CM Music (8 Channel Module) Triton FastTracker 8M Printer font with Math 8 extended character set PageMaker 8U Printer font with Roman 8 extended character set PageMaker 8xp Executable program for TI-83/84 Plus Graphics Calculator TI Connect 91 91x91 dpi display font Ventura Publisher 96 96x96 dpi display font Ventura Publisher [edit] A Ext. Description Used by A ADA source code file A Library unix A## AlZip Compressed Files' pieces A11 Graphics AIIM image file A80 Assembler language source for 8080 AAC Advanced Audio Coding is a standardized, lossy compression and encoding scheme for digital audio. AAF AutoPatcher file AAF Advanced Authoring Format is an advanced media wrapper file for professional applications. AAS Animation Play Script AAPlay AB6 Datafile ABStat AB8 Datafile ABStat ABC Document ABC FlowCharter 1.0 ABP Data ABComp compressed ABP AVS Barcode Profile AVS Barcode Source ABF Adobe Binary Screen Font Adobe Systems Software ABK Automatic backup file CorelDRAW ABM Image PALS album file ABM Album file (various programs) ABR Adobe Brush file for PhotoShop PhotoShop ABS Abstracts (info file) ABS Data file Abscissa AC Project backup Audit Command Language (ACL) ACA Project Project Manager Workbench ACB Archive ACB ACB see ACMB ACC Program (DR-DOS - ViewMax) GEM / resident ACCDA Data Microsoft Access Database Wizard (Open XML) ACCDB Data Microsoft Access Database (Open XML) ACCDE Data Microsoft Access Database Wizard (Open XML) ACCDT Data Microsoft Access Database Template (Open XML) ACCDU Data Microsoft Access Database Wizard (Open XML) ACE Archive ACE ACF Adobe Custom Filter for PhotoShop PhotoShop ACL Project Audit Command Language (ACL) ACL AutoCorrect List Microsoft Office ACM Audio Compression Module add-on Win ACMB Graphics file ACO Adobe Color Palette ACT ACTOR source code file ACTOR ACT Animations Works Actor (Graphics cell) Animation Works ACT FoxDoc Action Diagrams FoxPro ACT Presentation Action! AD AfterDark screensaver module AfterDark AD2 ADPCM 2-bit compressed voice file ZFAX AD3 ADPCM 3-bit compressed voice file ZFAX ADA Ada source code file ADB Ada Package Body ADC Bitmap graphics (16 colors) Scanstudio ADC Dictionary Lingvo ADD OS/2 adapter device driver ADF Amiga Disk File unADF, UAE, WinUAE etc... ADG Data ADG 3D Scene ADI Graphics file AutoCAD ADI Database Index File Advantage Database Server ADICHT LabChart data acquisition file ADInstruments ADL MCA adapter description library QEMM ADM After Dark support file AfterDark ADM ADEM file format ADEM ADI Database Memo File Advantage Database Server ADN Add-in Lotus 1-2-3 ADR After Dark support file AfterDark ADS Ada Package Specification ADT Datafile for cardfile application HP NewWave ADT Dictionary Lingvo ADT Fax AdTech ADI Database Table Advantage Database Server ADV GUS device driver Gf166.com ADX Document Archetype Designer ADZ Amiga Disk Zipped (See Amiga Disk File) GZip AEP After Effects Project File Adobe After Effects AF2 Flowchart ABC FlowCharter 2.0 AF3 Flowchart ABC FlowCharter 3.0 AFI Truevision bitmap graphics AFL Font file (for Always) Lotus 1-2-3 AFM Datafile for cardfile application HP NewWave AFM Type 1 font metric ASCII data for font installer ATM - many AFP Shape palette ABC FlowCharter AFT Template ABC FlowCharter 3.0 AFW Workplace ABC FlowCharter 3.0 AGR ArcView ASCII grid AHK AutoHotkey script file AutoHotkey AI Vector graphics file Adobe Illustrator AIF see AIFF AIFC Audio Interchange File Format with Compression AIFF Audio Interchange File Format Convert (c) Villena AiM Asm Text Mode Image File The Ultimate Draw AIN Archive AIN AIN Job schedule AutoIntern AIO APL programming language file transfer format file AIS Array of Intensity Samples graphics file Xerox AIX Datafile for cardfile application HP NewWave ALC Molecular coordinates Alchemy, RasMol ALG Activity Log ARCSOLO ALL Arts & Letters symbol and font files Arts & Letters ALL Filelist w/ all files FRQView ALL Format file for working pages Always ALL General printer information WordPerfect for Win ALO Almanac support file ALT Menu file WordPerfect Library ALZ AlZip Compressed Files AMF Music (Advanced Module Format) DMP AMG Archive AMGC AMG System image file ACTOR AML AutomationML AutomationML Group AMR Audio format for mobile phones (Nokia, SonyEricsson) AMS Adobe Monitor Setup calibration file PhotoShop AMS Music format ANI Animation cursors for Win Win95 - WinNT ANI Animation IconAuthor ANM Animation Deluxe Paint Animator ANN Help Annotations Windows 3.x Ann Multi volume ARJ archive ARJ ANS ANSI character graphics (animation) file ANSView ANS ASCII text ANSI character set NewWave Write AOL America On-line for Windows DLL Win AOS Add-On Software Nokia 9000 AP Archive WHAP AP Datafile Datalex EntryPoint 90 APC Printer driver Lotus 1-2-3 APD Printer driver Lotus 1-2-3 APE Monkey's Audio (Lossless) audio media players APF Printer driver Lotus 1-2-3 API Adobe Printer Ink file for PhotoShop PhotoShop API Passed parameter file 1st Reader API Printer driver Lotus 1-2-3 APL APL work space format file APL Support module used by Manugraphics APL products APM Authorware Macintosh Authorware APP Add-in application file Symphony APP Application object file dBASE Application Generator APP Application FoxPro APP Application and Application Bundle Mac OS X APP Executable workflow / macro file Automator APP Executable application file DR-DOS - NeXTstep - Atari APP Generated application FoxPro APR Employee performance review Employee Appraiser APW Authorware Windows Authorware APX Appexpert database file Borland C++ 4.5 AR Argon - for 3D Modeling Ashlar-Vellum AR7 Archive AR7 ARC Archive ARC - PKARC/PKXARC - PKPAS - PKUNPAK - QUARK ARC Archive SQUASH ARD Map Holux - Alan ARF Automatic Response File ARH Archivers definitions file DN ARI Archive ARI ARJ Archive ARJ - ARJZ ARK ARC archive CP/M port of ARC file archiver ARK Archive QUARK ARK Managing your Money Archive File ARR Arrangement Atari Cubase ART Gerber artwork Cadence Allegro ART First Publisher, Designworks, Greenstreet Draw graphic file All GST/Greenstreet Draw products ART Graphics (scrapbook) Art Import ART Graphics format (Another Ray Tracer) PFS:1st publisher - Art Import ARX Archive ARX ASC ASCII text file ASC Transport armor file PGP ASD Autosave file Microsoft Word ASD Presentation Astound ASD Screen driver Lotus 1-2-3 ASE Velvet Studio Sample AWAVE ASE ASCII Scene Export 3D Studio ASF Datafile STATGRAPHICS ASF Screen font Lotus 1-2-3 ASF Advanced Streaming Format (Compressed Windows audio/video) Microsoft Corporation ASK SYSGEN answer file RT-11 ASH Assembly language header file TASM 3.0 ASI ASIC language source ASIC ASI Assembler include file Turbo C - Borland C++ ASM Assembler language source TASM, MASM, NASM, Yasm, FASM ASMX ASP.NET Web Service Microsoft Corporation ASO Assembler object (object-oriented) file Turbo Assembler ASP ASPECT source code file Procomm Plus ASP Association of Shareware Professionals OMBUDSMN.ASP notice ASP Active Server Pages of Microsoft.Net Microsoft Corporation ASPX ActiveX Server Pages of Microsoft.Net Microsoft Corporation ASS Amalgam Scene Specification Halo 2 Map Editor ASS Advanced SubStation Alpha (Subtitles) AST Adobe Color Separation table for PhotoShop PhotoShop ASW Authorware Star Authorware ASX Advanced Stream Redirector file, redirects to an ASF file (see ASF) Microsoft Corporation ASZ Skin AltDesk AT2 Auto template Aldus Persuasion 2.0 AT3 Atrac 3 Sound/music file All Sony devices and programs with the Atrac 3+ specification ATM Adobe Type Manager data/info ATN Adobe Photoshop action Adobe Photoshop ATT AT&T Group GCGW ATY Produced when an association type is exported by 3D Topicscape 3D Topicscape AU Sun/NeXT/DEC Audio file AWAVE, GoldWave AU Sound (audio) file Sun Microsystems - Convert (c) Villena AUD Audio file AudioRack AUP Audacity project file Audacity AUX Auxiliary dictionary ChiWriter AUX Auxiliary references TeX/LaTeX AUZ Ableton Live File Authorization File for Ableton Live AVA Publication Avagio AVB AntiViral Toolkit Pro Bases AVI Audio Video Interleaved animation file Video for Windows AVR Audio Visual Research AWAVE AVS Application Visualization System AVT AVATAR-coding files A3E AW Text file HP AdvanceWrite AWA Animations Works Accelerated Movie Animation Works AWD Microsoft Fax At Work Document Microsoft Fax At Work AWK AWK script/program AWM Animations Works Movie (as .AVI) Animation Works AWS Data STATGRAPHICS Ax Directshow filter file format AXF ARM Executable Image generated by the ARM tools. AXM Axmedis object Axmedis Tools AZD Amazon Software Download Amazon Software Download AZW DRM enabled eBook Amazon Kindle AZZ Data file AZZ Cardfile [edit] B Ext. Description Used by B&W Black and white graphics file atari - mac B&W Mono binary screen image 1st Reader B Batch list APPLAUSE B_W Black and white graphics file atari - mac B1N Both mono and color binary screen image 1st Reader B30 Printer font (JLaser - Cordata) Ventura Publisher B8 Raw graphics file (one byte per pixel) plane two PicLab BA Binary Archive Scifer Archiver and Compression [External Header Mode] BAC Compiled BASIC RT-11 BASIC-11 BAD Bad file Oracle - many BAD File which covers bad blocks on disk volume (not to be moved) RT-11 BAK Backup file BAL Music score Ballade BALANCE Balance accounting sheet file Balance BAR Horizontal bar menu object file dBASE Application Generator BAR Info Bar for GFX2EXE GFX2EXE BAS BASIC language source QuickBASIC - GW-BASIC - FreeBASIC BAT Batch file MS-DOS, RT-11 BB Database backup Papyrus BBL Bibliographic reference file TeX/BibTeX BBM Brush Deluxe Paint BBP Playlist BassBox BBS Bulletin Board System announce or text info file BBS Hudson-style messagebase FTN software BC! Unfinished download Unfinished BitComet download (a BitTorrent client) BCF Card data Bingo Card Creator BCH Batch process object file dBASE Application Generator BCH Datafile Datalex EntryPoint 90 BCO Outline font description Bitstream BCP Borland C++ makefile BCT Backup dictionary Clarion BCW Environment settings Borland C++ 4.5 BDB Bookends database Bookends BDC Dictionary Lingvo BDEF Builder Definition Websphere Portlet Factory BDF Adobe Glyph Bitmap Distribution Format Adobe Software BDF Binary update file BUPDATE.EXE (c) TNT Techn. BDF Bitmap Distribution Format font file X11 BDF Datafile Egret BDM Videoclip AVCHD BDR Border Microsoft Publisher BDT Dictionary Lingvo BEZ Outline font description Bitstream BF Brainfuck sourcefile BF2 Bradford 2 font BFC Briefcase Win95 Win95 BFM Font metrics unix/Frame BFX Fax BitFax BGA Bitmap graphics BGI Borland Graphics Interface device driver Turbo C - Turbo Pascal BI BASIC include file Visual Basic - FreeBASIC BIB Bibliography (ASCII) BIB Database - not compatible with TeX format Papyrus BIB Literature database TeX/BibTeX BIF Binary Image Format b&w graphics file Image Capture board BIK Bink video file (RAD Video) BIN Binary file, usually zero-start (.com analog) BIN SGI Powerflip BIN Text mode memory dump The Draw - TUD - ACiDDraw - etc BIO BioniX Wallpaper playlist file BioniX Wallpaper Changer BIO OS/2 BIOS BIT Bitmap X11 BK! Document backup WordPerfect for Win BK Faxbook JetFax BK? Backup file BKn Timed backup file for document window n WordPerfect for Win BKP Backup file Write - TurboVidion DialogDesigner BKW Mirror image of font set FontEdit BLD BLoaDable picture BASIC BLD SYSGEN Build procedure file RT-11 BLEND Blender3D Project File Blender BLG Backup Log ARCSOLO BLK Temporary file WordPerfect for Win BM BitMap graphics file BM3 UIQ3 Phone backup BMK Help Bookmarks Windows 3.x BMP OS/2 or Win graphics format (BitMap Picture) QPeg - CorelDraw - PC Paintbrush - many BMT Ami Pro Button Ami Pro BNA Data Atlas Boundary BNK Adlib instrument bank file BNR Graphics Banner Banner - Poster BOK Shamela Library book Shamela Library Program BOO Book-format READIBM BOO Compressed file ASCII archive created by BOO (msbooasm.arc) msbooasm.arc BOO Boo programming language source file. Boo Programming Language BOT Bot files, these go with JKB files Quake 3 Engine BPC Chart Business Plan Toolkit BPOLY Data Prisms binary 3D object BPP Backup application Clarion BPT Bitmap fills file CorelDRAW BR Script Bridge BRD Eagle Layout File BRD Tanzzle board file Tanzzle BRD Cadence Allegro board file Cadence BRK Fax Brooktrout Fax-Mail BRK The Brake! Mailer REXX script The Brake! BRL CAD Ballistic Research Laboratory CAD BS2 Archive BS2.EXE BSA Archive BSArc BSC Compressed Apple II file archive created by BINSCII BINSCII BSC Database Source Browser BSC Pwbrmake object file Microsoft Fortran BSP Half-Life\Half-Life 2 map files Valve Corporation BSS Casio Phone base PC-LINK BST BiblioTex file (BiblioTex=bibliography file) TeX BSY Busy flag FTN soft BTM Batch-to-memory (quick batch) 4dos -ndos BTN Makeover Button file BUFR Binary Universal Form for the Representation of Meteorological Data BUG Bugs and Problems BUN LucasArts Bundle File BUP Backup file BUT Button definitions Buttons! BUY Datafile format movie BVn Overflow file below insert point in Doc n WordPerfect for Win BWB Spreadsheet application Visual Baler BWR Beware (buglist) Kermit BYU BYU Movie BYU BZ2 Archive bzip2 BZM Map Blitzkrieg [edit] C Ext. Description Used by C-- C\u2014language source Sphinx C-- C C language source Watcom C/C++ C Unix file archive COMPACT C++ C++ language source C00 Print file Ventura Publisher C01 Typhoon wave files AWAVE C86 C source code file Computer Innovation C86 CA Initial cache data for root domain servers Telnet CA? Borland packed and split file Borland Installer CAB Win 95 packed file Win 95 CAC dBASE IV executable when caching on/off (see cachedb.bat) CAD Drawing BobCAD-CAM CAD Document Drafix Windows CAD CAL Calendar file Windows 3.x CAL Spreadsheet format SuperCalc CALS Computer Aided Acquisition and Logistics CALS Support Raster Format CAM Casio Camera CAN Fax Navigator Fax CAP Caption Ventura Publisher CAP Capture file ProComm - Telix CAS C + ASM language source Turbo C CAT Catalog CP Backup - dBASE IV CAT Device driver digital signature Microsoft Windows CAT Stellarium Star Catalogue Stellarium CATS Combined source ATS CBA Source code Creative BASIC CBC Fuzzy logic system CubiCalc CBL COBOL source code file CBM Compiled bitmap graphics XLib CBR Comic Book Reader (RAR file) CDisplay and similar CBS MasterWord button bar configuration file CBT Computer Based Training many CBZ Comic Book Reader (ZIP file) CDisplay and similar CC C++ source code file CC CC language source CC CCC Bitmap graphics (native format) Curtain Call CCF Communications configuration file Symphony CCH Chart CorelChart CCITT CCITT Group 3 and Group 4 Encoding CCL Communication Command Language file Intalk CCO BTX Graphics file XBTX CCT Print Template BobCAD-CAM CD CD description DN CDA CD-Audio Win95 CDB Card database CardScan CDB Main database TCU Turbo C Utilities CDF Common Data Format CDF Cyberspace Description Format CDF Graphics netcdf CDK Document Atari Calamus CDL CADKey CADL Language CADKey CDM Disk Drivers NPA Novell NetWare CDM Music format (compressed) CDR Vector graphics format (drawing) CorelDraw! CDT Corel Draw Template File CorelDraw! CDX Compound index file Visual FoxPro, Advantage Database Server CE Computer Eyes Conversion Artist CE Main.ce The FarSide Computer Calendar CEB Cont. Edge Bitmap Conversion Artist CEF CA-Clipper Workbench Application CA Clipper CEF Export File CEF Compact Embedded Font Adobe Illustrator CEG Bitmap graphics Tempra Show - Edsun Continuous Edge Graphics CEL Animation CEL 3D Studio CEL Graphics Autodesk Animator - Lumena CF Configuration file imake CFG Configuration file CFL Chart CorelFLOW CFM ColdFusion Markup Language Adobe ColdFusion CFN Font data Atari Calamus CFO C Form Object internal format object file TCU Turbo C Utilities CFP Fax The Complete Fax Portable CFT CFast graphics file Disney Animation Studio CGA CGA display font Ventura Publisher CGI Common Gateway Interface script CGM Computer Graphics Metafile vector graphics A&L - HG - many CH Clipper language header CA Clipper CH3 Chart Harvard Graphics 3.0 CH4 Presentation Charisma 4.0 CHD Font descriptor FontChameleon CHI ChiWriter Document ChiWriter - Chiview CHK Recovered data DOS CHKDSK CHK Temporary file WordPerfect for Win CHL Configuration History Log CHM Compiled Help File Microsoft Windows, Help Explorer Viewer CHN Data Ethnograph 3 CHP Chapter file Ventura Publisher CHR Character set Turbo C - Turbo Pascal CHT Chart Harvard Graphics 2.0 - SoftCraft Presenter CHT CHeaT in any program/game many CHT Interface file for ChartMaster dBASE CHZ Archive CHARC CIF Caltech Intermediate Format graphics file CIF Chapter information Ventura Publisher CIF Crystallographic Information File RasMol, Jmol CiM C Text Mode Image File The Ultimate Draw CIX Database index TCU Turbo C Utilities CKB Borland C++ 4.x editor keystroke mapping BCW.EXE CL COMMON LISP source code file CLA Source Clarion CLASS Java class file Java CLD Clipper debugger configuration file CA Clipper CLP Clip art graphics file Quattro Pro CLP Clipboard file Windows 3.x CLP Compiler response file CA Clipper CLP Graphics format PCPAINT/Pictor CLR Color binary screen image 1st Reader CLR Color definitions Photostyler CLR Color scheme Boxer/2 CLR Palette file for GIS format CLS C++ class definition file CLW MFC Class Wizard information Microsoft VC++ CM Data file CraftMan CMB Xtree for Windows Button Bar file CMD Command dBASE - Waffle CMD Command Prompt batch file Microsoft Windows NT based operating systems CMD executable programs CP/M-86 operating system CMD External command menu 1st Reader CMD OS/2 batch/REXX file OS/2 CMF FM-music file (Creative Music File) CMK Card Card Shop Plus CMM CMM script (batch) file CEnvi CMP Bitmap graphics (Lead CMP compression) CMP Compressed data PKWare Inc. data compression library CMP Header file for PostScript printer files CorelDRAW CMP Photofinish Calibration Map Photofinish CMP User dictionary Microsoft Word for DOS CMRL Concise message routing language DOTGO CMS Content Management System Any Web Browser CMU Carnegie Mellon University Formats CMV Animation (CorelMove CorelDraw 4.0) CorelMove CorelDraw 4.0 CNC CNC general program data CND System generation conditional file RT-11 CNF Configuration (program - printer setup) program - printer setup CNF Configuration file CNV Temporary file WordPerfect for Win CNV Winword DLL used as part of an import operation (CNV=converter) Microsoft Word CO Cobalt - parametric drafting and 3D modeling Ashlar-Vellum COB Calgari trueSpace2 File Format COB COBOL source code file COD Code definition table UUPC COD Datafile Forecast Plus - Microsoft Multiplan - StatPac Gold COD file uncluding CODES for any program/game many COD Printer code definition file Boxer/2 COD Program compiled code FORTRAN COD Template source file dBASE Application Generator COD Videotext file COE Coefficient file Xilinx ISE COF Animation Control File Diablo II COL Color palette Autodesk Animator - many COL Spreadsheet Microsoft Multiplan COM Command (memory image of executable program) DOS COM Indirect command file (sequence of commands to be executed) RT-11 CON Configuration file Simdir CON MSTS Consist file MSTS CPC Compressed image Cartesian Perceptual Compression CPD Script Complaints Desk CPF Fax The Complete Fax CPI ColorLab Processed Image bitmapped graphics file CPI MS-DOS codepage file MODE.EXE CPL Control panel file Windows 3.x CPL Presentation Compel CPMZ ConPro/Miradi Zipfile Miradi and ConPro CPP C++ language source Watcom C/C++ CPP Presentation CA-Cricket Presents CPR Knowledge Access GCGW CPS backup of startup files by QEMM (?) autoexec.cps CPT Encrypted memo file dBASE CPT Mac file archive COMPACT PRO CPT Template CA-Cricket Presents CPZ Music text file COMPOZ CR2 RAW image format Canon digital cameras CRA Advanced crack file (usually text) CRD Cardfile Windows 3.x - YourWay CRD Map Holux - Alan CRD Molecular coordinates CHARMM, RasMol CRF Cross-reference Microsoft MASM - Zortech C++, RT-11 CREF CRK Crack file (usually text) CRP Encrypted database dBASE IV CRS File Conversion Resource WordPerfect 5.1 CRT Terminal settings information Oracle CRU Compressed file archive created by CRUSH CS C# source file C# CSG Batch file (Submit) ISIS/w CSG Graph Statistica/w CSM Borland C++ 4.x precompiled header file BCW.EXE CSP PC Emcee Screen Image file Computer Support Corporation CSS Datafile CSS - Stats+ CSS Datasheet Statistica/w CSS cascading style sheet CSV Adjusted EGA/VGA palette CompuShow CSV Comma Separated Values text file format (ASCII) CTC Control file PC Installer CTF Character code translation file Symphony CTK CommonTime Key file CommonTime software applications CTL Control file dBASE IV - Aldus Setup CTL BATCH control file (generated by BATCH from .BAT file) RT-11 CTT BATCH Temporary file RT-11 CTX Ciphertext file Pretty Good Privacy RSA System CTX Course TeXt file some Microsoft online guides CTX document Creativyst Table eXchange CUF C Utilities Form definition TCU Turbo C Utilities CUR Windows resource (cursor image file) Resource Workshop - WRT - Watcom Resource Editor CUT Graphics format (bitmapped graphics) dr. Halo CV4 Color file CodeView CVP Cover page WinFax CVS Graphics Canvas CVT Backup file for CONVERTed database file dBASE IV CVW Color file CodeView CWEB C Web CWK Datafile ClarisWorks, Appleworks CXX C++ source code file Zortech C++ [edit] D Ext. Description Used by D D Programming Language source file DMD D4D Data Draw 4D object D4P Data Draw 4D Pro object D64 Commodore 64 disk image DAA Direct Access Archive DAF Data file Digital Anchor DAT Document Microsoft Word Format (old) DAT data RSNetWorx Project DAT Data file in special format or ASCII DAT Database file Clarion (programming language) DATS Dynamic source ATS DB$ Temperature debug info Clarion Modula-2 DB$ Temporary file dBASE DB Database file Paradox - XTreeGold - dbvista DB Configuration dBASE IV - dBFast DB Multi Edit config ME DB2 Database dBASE II DB3 Database dBASE III DBA Database file Turbo Prolog - DataEase DBA DarkBasic source code DBC DataBaseContainer Visual FoxPro DBD Business data Business Insight DBD Debug info Clarion Modula-2 DBF Database file dBASE III/IV - Visual FoxPro - dBFast - DataBoss - DBVista - CA-Clipper - Visual Objects - Alaska Xbase++ - Advantage Database Server DBG Debugger script DOS debug - Watcom debugger DBG Symbolic debugging information Microsoft C/C++ DBK Database backup dBASE IV DBL DIBOL source file DBM Datafile DataEase DBM Menu template DataBoss DBO Compiled program dBASE IV DBPro DarkBasicPro Project DBS Data file used by Managing Your Money DBS Database in SQL Windows format DBS Datafile PRODAS DBS Printer description file Microsoft Word, Microsoft Works DBT FoxBASE+ style memo FoxPro 2.x DBT Memo file for database w/same name dBASE IV - dBFast DBW Windows file DataBoss DBX DataBeam GCGW DBX AutoCAD Database AutoCAD DBX Archive File Outlook Express DC6 Image file Diablo II DCA Document Content Architecture text file IBM DisplayWrite DCC Animation Diablo II DCF floppy disk image Disk Copy Fast DCL Delphi Control Library Borland Delphi DCM DCM music module AWAVE DCP OS/2 device code page OS/2 DCS Bitmap graphics (CYMK format) QuarkXPress DCS Datafile ACT! Activity Files DCT Dictionary: used by many programs with program dependent format Clarion DCT Spell checking dictionary Harvard Graphics 3.0 - Symphony DCT DataBaseContainer Extension Visual FoxPro DCU Delphi unit (compiled) Borland Delphi DCW Walter Machine Programing Walter Profile Editor DCX Multi-page PCX graphics (common fax format) Intel - SpectraFAX DCX DataBaseContainer Index Visual FoxPro DD Macintosh file archive DISKDOUBLER DDA Data GLBasic ASCII 3D object DDB Bitmap graphics DDB Digidesign Database File Digidesign ProTools DDI Disk image DiskDupe DDP Device Driver Profile file OS/2 DDS DirectDraw Surface file Microsoft Flight Simulator, other Microsoft programs DEB DEBUG script DOS Debug DEF Assembly header file Geoworks DEF Defaults - definitions DEF Linker definition file TLink - WLink... DEM Demonstration DEM Digital Elevation Model DEM Graphics file VistaPro DEM Vista DEM file Meta.exe VP3 DES Ascii text parameter description AWAVE desktop Desktop Entry freedesktop.org DEV Device driver DEV SYSGEN handler build procedure RT-11 DEV Dev-C++ project file Dev-C++ DFD Data Flow Diagram graphic file Prosa DFI Outline font description Digifont DFL Default program settings Signature DFM Data Flow Diagram model file Prosa DFM Delphi form module Borland Delphi DFS Delight Sound File DFV Printing form (Word) Microsoft Word DFX Micrografx Effects DLL DGN Graphics file MicroStation DGS Diagnostics DH Dependency information for .ph Geoworks DHP Dr. Halo PIC Format graphics file Dr. Halo II - III DHT Datafile Gauss DI D Programming Language interface file DMD DIA Diagraph graphics file Computer Support Corporation DIB Device Independent Bitmap rarely used Windows 3.0 bitmap; Win - OS/2 DIC Dictionary (e.g. from WinWord) DIF Borland patch data file Borland patch DIF Data Interchange Format Visicalc DIF OS/2 V2.2 Display Information File OS/2 DIF Output from Diff command - script for Patch command DIF SRCCOM, BINCOM output file RT-11 DIG Digilink AWAVE DIG Sound Designer 1 audio file AWAVE DIP Graphics DIP Watcom debug info processor WatcomDebugger DIR Dialing directory file Procomm Plus DIR Directory file VAX - CPS Backup DIR Movie MacroMind Director 4.x DIR Directory listing file RT-11 DIS Distribution file VAX Mail DIS Thesaurus CorelDraw DIZ Description file (Description In Zip) DJVU A PDF LIKE FILE DJVU DKB Raytraced graphics DKBTrace DL Animation format (Italian origin) Display - DL Viewer DLD Lotus 1-2-3 DLG Dialog resource script file Microsoft Windows SDK DLG Dialog resources DN DLF Dialogue Live Format Produced by Exstream Dialogue and edited by Dialogue Live Editor DLG Windows SDK dialog editor data file DLG Windows SDK dialog editor data file DLL Dynamic-link library Windows 3.x - OS/2 DLL Export/import filter CorelDRAW DLM Microsoft File Transfer Manager Microsoft File Transfer Manager DLP Data DAQLab DLS Setup Norton Disklock DMF Music format (Delusion Digital Music File) Delusion DMG Apple Disk Image Mac OS X (Disk Utility), DMO Demo Derive DMP Dump file (eg. screen or memory) DMP DUMP utility output file RT-11 DMS Amiga file archive DISKMASHER DNG Digital Negative (DNG), a publicly available archival format for the raw files generated by digital cameras. At least 30 camera models from at least 10 manufacturers, and at least 200 software products. DNT data RSNetWorx Project DOC A Document, or an ASCII text file with text formatting codes in with the text. This generic extension is used by many word processors. Microsoft Word and others DOCM Microsoft Word 2007 Master document Microsoft Word 2007 DOCX Office Open XML Text document Microsoft Word DOF Delphi project options file Borland Delphi DOG Screen file Laughing Dog Screen Maker DOH Dependency information for .poh Geoworks DOR Roland Digital audio file Roland DOS External command file 1st Reader DOS Network driver (eg. pkt_dis.dos) DOS OS/2 V3 SVGA PMI-File Svga.exe DOS Something for MS-DOS (e.g. msdos.dos) Win95 DOS Text file containing DOS specific info DOT Line-type definition file CorelDRAW DOT Microsoft Word document template Microsoft Word DOTX Office Open XML Text document template Microsoft Word DOX Text file MultiMate 4.0 DOZ Description Out of Zip VENDINFO DP Calendar file Daily Planner DP Data file DataPhile DPR Default project- and state-related information Borland C++ - Delphi - C DPX Digital Moving Picture Exchange DRP Web3D File Web3D DRS Display Resource WordPerfect for Win DRV Driver DRW Designer vector graphics file Designer - MicroGraphix DS TWAIN Data Source Any twain-source must supply one xxx.ds file DS1 Map file Diablo II DS4 Vector graphics Micrografx Designer 4.x DSC Celestia Deep Space Catalog file Celestia DSC Description file DSC Discard file Oracle DSD Database DataShaper DSF Data Storage Format Golden Helix DSF Delusion Digital Sound File Delusion DSK Desktop configuration BP - DN - BC++ - TP DSK Disk Drivers Novell NetWare DSK Logical disk file RT-11 DSM Digital Sound Module DSI DSN Design Object System Designer DSP Display parameters Signature DSP Dynamic Studio Professional Module Dynamic Studio DSP Graphics display driver Dr. Halo DSP Norton viewer DLL Win DSR Driver Resource WordPerfect for Win DSS Screensaver file DCC DSS Digital Speech Standard (Sound) Digital Soup DSS SQL Script for .Time Framework Exaktime DST WAIN (Scanner spec) data source DLL Win DSW Borland C++ 4.x desktop layout file BCW.EXE DSY DAISY container file ADAKTA.EXE DT1 Tile file Diablo II DT_ Data fork of a Macintosh file Mac-ette DTA Data file Turbo Pascal - PC-File - Stata DTB Database Backup for .Time Framework Exaktime DTF Database file PFS - Q&A DTL Django template language djangoproject DTM DigiTrekker music module AWAVE DTO data Directory Toolkit output DTP Desk Top Publishing Document Timeworks / greenstreet Publisher3/ Greenstreet Publisher 4.5 DTP Page Magic 2.0 publication Page Magic 2.0 upgrades to Greenstreet Publisher DTP Publication Publish-It! upgrades to Greenstreet Publisher DVC Data Lotus 1-2-3 DVDPROJ iDVD project file iDVD (Apple iLife '08) DVI DeVice Independent document TeX DVP DESQView run-file DESQView DVP Device parameter file AutoCAD DW2 Drawing DesignCAD for windows DWB Coryphaeus Software Designers Workbench CSD DWC Archive DWC DWD DiamondWare Digitized file AWAVE DWG Drawing AutoCAD, IntelliCAD, PowerCAD, Drafix, etc. DX Text file DEC WPS/DX format - DEC WPS Plus DXF Dialogue Exchange Format Exstream Dialogue DXF Drawing Interchange File Format vector graphics AutoCAD, IntelliCAD, PowerCAD, etc. DXN Fax Fujitsu dexNET DYN Data Lotus 1-2-3 [edit] E Ext. Description Used by E2D 2-dimensional vector graphics file Editor included in JFire EAS Extended file attributes OS/2 EAR Enterprise archive archive EBA Source code Emergence BASIC EBJ Error-checking object file Geoworks EBQ CITE standard electronic BQ exchange file EC Error checking preprosessed Goc source code Geoworks EC Source code Ecere SDK ECC Error-checking file dvdisaster ECMS Status document ECMerge ECMT Template document / Session ECMerge ED5 EDMICS GCGW EDA Ensoniq ASR disk image AWAVE EDE Ensoniq EPS disk image AWAVE EDF European data format Medical timeseries storage files EDF Macrocom Online Kitchen-planer EDK Ensoniq KT disk image AWAVE EDL EDL Premiere EDQ Ensoniq sq1,2/ks32 disk image AWAVE EDS Ensoniq SQ80 disk image AWAVE EDT Default settings VAX Edt editor EDT Ensoniq TS disk image AWAVE EDT External editors definitions DN EDV Ensoniq VFX-SD disk image AWAVE EEB Button bar for Equation Editor WordPerfect for Win EFA Ensoniq ASR file AWAVE EFA Encrypted File Archive EFE Ensoniq EPS file AWAVE EFE Ensoniq EPS instrument file AWAVE EFK Ensoniq KT file AWAVE EFQ Ensoniq SQ1/SQ2/KS32 file AWAVE EFS Ensoniq SQ80 file AWAVE EFT Ensoniq TS file AWAVE EFT High resolution screen font ChiWriter EFV Ensoniq VFX-SD file AWAVE EFX Fax Everex EFax EGA EGA display font Ventura Publisher EKA Internal data files Borland's Eureka EL ELISP source code file Emacs lisp ELB Synergy/DE library ELC Compiled ELISP code Emacs lisp ELI Archive ELI ELT Event list text file Prosa EMD ABT Extended MoDule AWAVE EMF Microsoft Enhanced Metafile EML Stationery Template Outlook Express EMU Terminal emulation data BITCOM ENC Encoded file - UUENCODEd file Lotus 1-2-3 - uuexe515.exe ENC Music Encore END Arrow-head definition file CorelDRAW ENFF Extended Neutral File Format ENG Dictionary engine Sprint ENG English documentation ENG Graphics file (charting) EnerGraphics ENV Envelope or Environments ENV Enveloper macro WOPR ENV Environment file WordPerfect for Win EPD Publication Express Publisher EPI Document Express Publisher EPI Encapsulated PostScript graphic file EPS Encapsulated PostScript (Graphics format) CorelDraw - PhotoStyler - PMView - Adobe Illustrator - Ventua Publisher EQN Equation filE WordPerfect for Win ERD Entity Relationship Diagram graphic file Prosa ERL Erlang source code file ERM Entity Relationship Diagram model file Prosa ERR Compiler/linker error report ESH Extended Shell batch file ETH Document Ethnograph 3 ETF Encrypted Text File. Used in some security programs. ETW Proprietary format from EnterTech for the MagicSing/Mic Karaoke product line. Enter-Tech ETX Structure-enhanced text for some ascii text browsers EUI Ensoniq EPS family CD image AWAVE EVT Events descriptions EVY Document WordPerfect Envoy EWD Document Express Publisher for Windows EX3 Device driveR Harvard Graphics 3.0 EXC Exclude file for Optimize (do not process) (QEMM) QEMM EXC REXX source code file VM/CMS EXE Directly executable program DOS EXF Excute file OnHand PC EXM MSDOS executable, system-manager compliant (HP calculator) HP calculator EXP Protected mode EXE by PharLap Software PharLap EXP Exports Library File VisualStudio EXT Extensions descriptions file EXX Intermediate file by MsgPut IBM LinkWay EZF Fax Calculus EZ-Fax [edit] F Ext. Description Used by F Archive FREEZE F Fortran language source code file (in fixed form) Many Fortran compilers F01 Fax perfectfax F03 Fortran language source code file (in free form) Many Fortran compilers F2R Farandole Linear Module Farandole F3R Farandole Blocked Linear Module Farandole F4 Fortran IV source code file F4A Audio for Adobe Flash Player F4B Audio Book for Adobe Flash Player F4P Protected Video for Adobe Flash Player F4V Video for Adobe Flash Player F77 Fortran language source code file (in fixed form) Many Fortran compilers F90 Fortran language source code file (in free form) Many Fortran compilers F95 Fortran language source code file (in free form) Many Fortran compilers F96 Fax Frecom FAX96 FAC see FACE FACE Usenix FACE graphics file FAM Famtasia Famicom image format Famtasia FAQ Frequently Asked Questions text file FAR Music format (Farandole Composer Module) Farandole FAS Macsyma compiled program FAX Fax (raster graphics in CCITT format) most Fax programs FBM Fuzzy Bitmap FC Spell checking dictionary Harvard Graphics 2.0 FCM Binary file patch file (forward compression) jlpak10.zip FD Declaration file Microsoft Fortran FD Field offsets for compiler DataFlex FD Front Door' resource files FD FDB Font Definition Block Ming library FDS fwNES Famicom Disk System image fwNES FDS Headerless Famicom Disk System image FDW Form F3 Design and Mapping FE Data Surface Evolver 3D surface FEB Button bar for Figure Editor WordPerfect for Win FEI Fatal Error Infotable Geoworks FES File produced when a fileless occurrence in 3D Topicscape is exported to Windows 3D Topicscape FF Intelligont FIAS format FF Outline font description Agfa Compugraphics FFE Front Fareast Famicom image format FFF Fax defFax FFI Atech FastFont (AllType) FFIVW File Format for the Interchange of Virtual Worlds FFT Dca/FFT Final Form Text text file (DisplayWrite) FFT DCA/FFT Final Form Text text file DisplayWrite FH3 Vector graphics Aldus FreeHand 3.x FH4 Vector graphics Aldus FreeHand 3.x FI Interface file Microsoft Fortran FIF Fractal Image Format file FIG Figure File MATLAB FIL Table Data Audit Command Language (ACL) FIL File template Application Generator FIL Filelist FIL Files list object file dBASE Application Generator FIL Mirror. FIL is the name given to the saved FAT by the mirror program included in some versions of DOS and in PCTools MS-DOS - FIL Overlay WordPerfect FIL File which was moved to the Virus Vault by AVG FILM Filmkey film file Filmkey Player FIN Print-formatted text file Perfect Writer - Scribble - MINCE FIO Aldus PhotoStyler graphics filter FIO Image PALS viewer DLL FIT File Index Table WindowsNT FIT see FITS FITS Flexible Image Transport System FIX Patch file FKY Macro file FoxPro FLA Adobe Flash files' basic format FLAC Audio codec, Audio file format FLAME Fractal configuration file Apophysis FLB Format library Papyrus FLC Animation format FLIC >320x200 AAPlay - Autodesk AniPro FLD Folder Charisma FLI Animation format FLIC 320x200 Autodesk Animator FLI TeX font library EmTeX FLM Film Roll AutoCAD/AutoShade FLP Flstudio project file Fruity Loops (FlStudio) FLT Data/file conversion filter (or overlay) Alsud, Microsoft Word FLT Filter file Micrografx Picture Publisher FLT MultiGen Flight FLT Support file - graphics filter Asymetrix ToolBook FLX Animation format FLX Compiled binary DataFlex FLV Flash video file Flash Video Player FM Database FileMaker Pro FM1 Spreadsheet format overlay Lotus 1-2-3 release 2.x FM3 Device driver Harvard Graphics 3.0 FM3 Spreadsheet Lotus 1-2-3 release 3.x FMB File Manager Button bar WordPerfect for Win FMF Font or icon file IBM LinkWay FMK Makefile Fortran PowerStation FMO Compiled format file dBASE IV FMT Format file dBASE IV - FoxPro - Clipper 5 - dBFast FMT Gate3 format file FMT Style sheet Sprint FMV Full Motion Video file FN3 Font file Harvard Graphics 3.0 FND Files searching properties Win95 FNI FileNet Native Document FileNet FNK FunkTracker music module AWAVE, FunkTracker FNM Fannie Mae Residential Loan Data (RLD) format for mortgage submission to DO/DU. Desktop Originator Fnn DOS screen text font - height nn pixels fntcol13.zip FNT Font file many FNX Inactive font Exact FO1 Font file Borland Turbo C FO2 Font file Borland Turbo C FOG Fontographer Database File Fontographer3.5 FOL Folder of saved messages 1st Reader FON Log of all calls Procomm Plus FON Terminate phonebook Terminate - Terminator - Telix FON Windows bitmapped font file Win FONT Font data unix FOP Freedom of the Press graphic file FOR Form WindowBase FOR Fortran language source file many FOT Installed Truetype font Windows Font Installer FOX Foxbase executable (precompiled .prg) FoxBase FP Final Page file FoxPro for DOS FP Tiff file TIFF/IT P1 FP Video file DVICO/TVIX MPEG1 video file FP3 Database FileMaker Pro FP4 Database FileMaker Pro FP5 Database FileMaker Pro FP7 Database FileMaker Pro FPC Catalog FoxPro FPD TMT Pascal compiled unit TMT Pascal FPM Configuration file FoxPro for MacIntosh FPT Foxpro memo field tables FoxPro FPU Configuration file FoxPro for Unix FPW Floorplan drawing FloorPLAN plus for Windows FPW Configuration file Visual FoxPro FR? Packed mail FTN software FR3 Renamed dBASE III+ form file dBASE IV FRF FontMonger Database file FontMonger FRG Uncompiled report file dBASE IV FRL GP-Forth library GP-Forth FRM Registration or other form FRM Report file dBASE IV - Clipper 5 - dBFast FRM Visual Basic Form Visual Basic FRO Compiled report file dBASE IV FRP Form PerForm PRO Plus - FormFlow FRS Screen Font Resource WordPerfect for Win FRT Additional (FPT) report description file FoxPro FRT GP-Forth source file GP-Forth FRX Main (DBF) report description file Visual FoxPro FRX Visual Basic binary program file Visual Basic FSA Applied Biosystems Genetic Analysis data file GeneScan FSIM Simulation File Format Loudsoft FSL Form Paradox for Windows FSM Farandole Composer WaveSample Farandole FSPROJ Habanero Firestarter project Habanero Firestarter FST Linkable program dBFast FSX Data Lotus 1-2-3 FTM Fielded Text Meta - Contains schema/Meta for a Fielded Text file Fielded Text FTM Font file Micrografx FTX Declared Fielded Text Fielded Text FTXT text Cloanto text document FTP Configuration FTP Software PC/TCP FW Database FrameWork FW2 Database Framework II FW3 Database Framework III FWEB Fortran WEB FX On-line guide FastLynx FXD Phonebook FAXit FXP Foxpro executable (precompiled .prg) Visual FoxPro FXS FAX Transmit Format graphics file WinFax FYF FileLoc FyTek, Inc. [edit] G Ext. Description Used by G Data chart APPLAUSE G16 GoldED for DOS compiled config GOLDED.EXE G3P data Grand Prix 3 car physics G8 Raw graphics file (one byte per pixel) plane three PicLab - Cubicomb Picturemaker GAM Fax GammaFax GB Game Boy ROM GB1 Game Maker backup file (can also be GB2, GB3, etc.) GBA Game Boy Advance ROM GBC Game Boy Color ROM GBL Global definitions VAXTPU editor GBL Global module in Basic programs GBR GIMP brush GC1 Lisp source code Golden Common Lisp 1.1 GC3 Lisp source code Golden Common Lisp 1.3 GCA IBM GOCA GCGW GCD Graphics GCD General content descriptor Wireless devices GCF Game cache file Steam content delivery system GCX Graph file Mac OS X Grapher GD3 Game Doctor Super NES ROM image GDF General Data Format for Biomedical Signals Biomedical signal processing, Brain Computer Interfaces GDF Dictionary file GEOS GDF Geographical Data Format Various mapping software GDF IBM Graphics Data Format Legacy IBM systems GDL Data ArchiCAD model GDS McDonnell-Douglas Things GE GEcho config file GEcho GED GEDCOM Genealogy data exchange GED EDITOR's native file format Arts & Letters GED GoldED for DOS compiled config file GOLDED.EXE GED Graphics editor file EnerGraphics GED Game Editor Data / project file Game Editor GEM Vector graphics file GEM - Ventura Publisher GEN Compiled template dBASE Application Generator GEN Generated text Ventura Publisher GEO Geode Geoworks GEO GEOS specific file (application) GEOS GEO GoldED for OS/2 compiled config file GED2.EXE GEX GEcho config file GEcho GFB Compressed GIF image created by GIFBLAST gifblast.exe GFO SGI Radiosity GFT Font NeoPaint GFT GEM-translator font file GFX Instant Artist graphics Files Instant Artist GFX PCBoard @X-coded colorful text GFX2COM - GFX2EXE GHO Norton Ghost File (first file) Symantec GHS Norton Ghost File (split file) Symantec GIB Chart Graph-in-the-Box GIB GIMP animated brush GID Help index windows 95 help GIF Compuserves' Graphics Interchange Format (bitmapped graphics) QPeg - Display - CompuShow GIW Presentation Graph-in-the-Box for Windows GKH Ensoniq Disk Image (VFX, SD, EPS, ASR, TS) Ensoniq GKS Graphics Kernel System GL Animation format grasprt.exe, PV GL Animation GRASP GRAphical System for Presentation GLB Global module in Basic programs GLM Datafile Glim GLO Global module in Basic programs GLS Datafile Across GLY Winword Glossary Microsoft Word GM6 Game Maker Editable file as of version 6.x GMD Game Maker Editable file up to version 5.x GMF CGM graphics file APPLAUSE GMK Game Maker Editable file as of version 7.x GML Game Maker GML file GMOD Data Golgotha 3D model GMP Geomorph tile map SPX GMS Ghost Mouse Script GMS Gesture and Motion File Formats GMT data RFactor car physics GOC Goc source code file Geoworks GOE GOES graphic file GOH Goc header file Geoworks GP5 Guitar Pro 5 song Guitar Pro 5 GP Geode parameter file Geoworks Glue GP4 data Grand Prix 4 car physics GPH Graph Lotus 1-2-3/G GPK Omnigo program package GPX GPS eXchange Format GR2 Screen driver Windows 3.x GRA Datafile SigmaPlot GrADS Metafile GRAFFLE OmniGraffle graph file GRASP Graphical System for Presentation GRB T-FLEX CAD file Top Systems GRB MS-DOS Shell Monitor file MS-DOS 5 GRD Drivers for GRX (graphics library) GRX (c) Free Soft. Found. GRDNT Image format used in the core of some very obscure customized operating systems to represent gradients; see also SCTOR GRE data Grenoble Thermal Ellipsoids Plot Program GRF Graph file Graph Plus - Charisma GRIB Gridded Binary GRN Drivers for GRX (graphics library) GRX (c) Free Soft. Found. GRP Group file Windows 3.x - Papyrus GRP Pictures group PixBase GRY Graphics format (RAW GREYz) GS1 Presentation GraphShow GS3 data GameStarter GSA data Microsoft Office Groove Space Archive GSD Vector graphics Professional Draw GSM Raw GSM 6.10 audio stream AWAVE GSW Worksheet GraphShow GTA data Microsoft Office Groove Tool Archive GUP PopMail GV GrandView outline file GVO Data GFXFX Vector Object GWI Groupwise File Local saved Email GXL Graphics library Genus GZ Archive GNU zip - WinZipNT GZR data GunZ action replay [edit] H Ext. Description Used by H! On-line help file Flambeaux Help! Display Engine H! Pertext database HELP.EXE H-- C\u2014language header Sphinx C-- H Header file (usually C language) Watcom C/C++ H++ Header file C++ HA Archive HA HAL Data file Hyper Access Lite OS/2 HAM Disk Drivers NPA Novell NetWare HAM Hold And Modify Deluxe Paint image file HAP Archive HAP3 HBC Compressed Archive File (Shrink Algorithm) Hyperbac HBC Compressed Archive File (Shrink Fast Algorithm) Hyperbac HBE Compressed, Encrypted Archive File (Shrink & AES256-bit Encryption) Hyperbac HBK MathCAD handbook MathCAD HC Header file HCG Document HCLab HCGS Document HCLab HDD data disk image HDD HotDisc Designer label HDF Amiga Hard Disk Image HDF Help file Help Development Kit HDF Hierarchical Data File graphics file SDSC Image Tools HDL Alternate download file listing Procomm Plus HDR Datafile Egret HDR Message header text Procomm Plus - 1st Reader HDR PC-File+ Database header HDR SPOT image file HDS Hierarchical Data System HDW Vector graphics Harvard Draw HDX Help index AutoCAD - Zortech C++ HDZ Amiga Zip compressed Hard Disk Image HEP Novell Help Librarian Data File Novell NetWare HEX Hex dump HFI HP Font Info file GEM HGL Highlight groups definitions DN HGL HP Graphics Language graphics file HH C++ header file HHH Precompiled header file Power C HHP Help information for remote users Procomm Plus HI Game high scores table HIN Molecule HyperChem HIS History of executing/viewing/editing DN HIS Yard Information File FYM HKM Stores sound in a bitmapped graphics file HLB Help library VAX HLP Help file WinHelp, Help Explorer Viewer HLX Multi Edit help file MultiEdit 5.0 HLZ Multi Edit packed help file MultiEdit HMI Music format (MIDI) HMM Alternate Mail Read option menu Procomm Plus HMP Music format (MIDI) HMP Hump Setup File - Obsolete as of version 2.4 (See SET and SWT files) FYM HNC CNC program files Heidenhain (?) dialog HOF Hall Of Fame (game scores) HP Printout file for HP printers/plotters (HP/GL) HP8 ASCII text HP Roman8 character set NewWave Write HPF HP LaserJet fonts PageMaker HPG see HPGL HPGL Plotter file vector graphics (Hewlett-Packard Graphics Language) AutoCad - Harvard Graphics HPI Font information file GEM HPJ Help project Microsoft Help Compiler for Windows - HC.EXE HPK Archive HPACK HPM Alternate Main menu for privileged users Procomm Plus HPM EMM text HP NewWave HPM High Performance Map Quaestor 1.x HPP C++ header file Zortech C++ - Watcom C/C++ HPPCL Hewlett-Packard Printer Control Language HQX Archive (ASCII Mac) BINHEX HRF Graphics file (Hitachi Raster Format) HRM Alternate Main menu for limited/normal users Procomm Plus HRZ Graphics format SSTV HS2 Monochrome image Postering HSC 2-op FM music HSC tracker - hscplay.exe HSH Disk image hash file DriveSnapshot HSI Handmade Software Inc. graphics file almost JPEG Image Alchemy HST History file Procomm Plus HTM see HTML HTML Hypertext Markup Language (WWW) Netscape - Mosaic - many HTX Hypertext file HWD Presentation Hollywood HWP Hangul Word Processor Document Hangul (word processor) HXM Alternate Protocol Selection menu for all users Procomm Plus HXS Microsoft Help 2 compiled help file Microsoft Windows, Help Explorer Viewer HXX C++ header file HY1 Hyphenation algorithms Ventura Publisher HY2 Hyphenation algorithms Ventura Publisher HYC Data WordPerfect HYD Hyphenation dictionary WordPerfect for Win HYP Archive HYPER [edit] I Ext. Description Used by I Preprocessor output file Borland C Preprocessor IAK Internet Access Kit OS/2 IAM Assembly file Autodesk Inventor IAX Bitmap graphics (IBM Image Access eXecutive) IAX data InstallAnywhere.NET project IBG PDS graphic file IBM Archive (Internal IBM only) ARCHDOS ICA Bitmap graphics (Image Object Content Architecture) ICB Bitmap graphics ICC ICC configuration ICE Archive Cracked LHA (old LHA) ICM ICC configuration ICN ICON source code file ICO Icon file ICONEDIT.EXE; Microsoft Windows ID Disk identification file IDB IDA database IDA IDB VC++ Minimum Rebuild Dependency File Visual C++ IDC IDA C language source IDA IDE Borland C++ 4.x IDE project BCW.EXE IDF MIDI instrument description IDS IDA imported names format IDA IDW Vector graphics IntelliDraw IDW Drawing file Autodesk Inventor IDX Index many - FoxPro; also unrelated Quicken file format. IFD Form JetForm Design IFF Interchange Format File (IFF) EA Software - Convert (C) Villena - Amiga IFF Sun TAAC Image File Format SDSC Image Tool IFP Script KnowledgeMan IFS Fractal image compressed file Yuvpak IFS Installable file system OS/2 IGES Initial Graphics Exchange Specification IGF Inset Systems GCGW IGC Flight tracks downloaded from GPS devices in the International Gliding Commission's prescribed format IHP Watcom help file whelp.exe IHS Inbound History Bink/+ IIW Power Point Image Importer Wizard IL hDC Designer Icon Lin dll format ILB Data Scream Tracker ILG data LaTeX Index Generation log ILK Outline of program's format Microsoft ILink incremental linker IM Auran Jet indexed mesh file Trainz IM8 Sun raster graphics file IMA Mirage vector graphics EGO - Chart - Autumn IMG ADEX graphic file IMG Disk Image NC 5.0 IMG GEM bitmapped graphics file Ventura IMG Image for Windows/Image for DOS Disk image TeraByte, Inc. dba TeraByte Unlimited IMG Vivid IMG file IMI image Magellan Meridian map IMI image Magellan eXplorist map IMP Spreadsheet Lotus Improv IMQ Image presentation ImageQ IN$ Installation file HP NewWave IN3 Input device driver Harvard Graphics 3.0 INB Test script Vermont HighTest INC Include file several programming languages IND Data Index dBASE IV INDD InDesign Document Adobe InDesign INF Information text file (ASCII) INF Install script INF OS/2 hypertext help system file VIEW.EXE INF Type 1 LaserJet font information file soft font installers INFO GNU info reader (output from texinfo) unix INFO Icon Data (Amiga) INGR Intergraph Raster File Format INI Initialization file INK Pantone reference fills file CorelDRAW INS Data WordPerfect INS Ensoniq Instrument File Ensoniq INS Installation script 1st Reader INS Instrument music file (Adlib) INT Borland Interface Units INT Program saved in Internal (semi-compiled) format Signature INT Source of Borland interface module INX Index Foxbase IO Archive CPIO IOB 3d graphics database in TDDD format IOC Organizational chart Instant ORGcharting! ION 4DOS descript.ion file (file descriptions) 4DOS IP Immortal Player file Immortal Player IPC Intellitec Program Configuration - used to configure vehicle electronics Intellitec IPF Interchangeable Preservation Format SoftPres IPG iPod game file iTunes and iPod IPH Hi-Res Image InterPaint IPL Pantone Spot reference palette file CorelDRAW IPN Intecplan project Intecplan Business Plan Software IPS IPS Patching Format (International Patching System) Rom hacking community IPT Part file Autodesk Inventor IPT MultiColor Image InterPaint IRS Resource (WordPerfect) standard.irs WordPerfect IRT Data IRIT 3D model IRTR Graphicon-2000 Interactive Real-Time PHIGS ISD Spelling Checker dictionary RapidFile ISH Archive ISH ISMA Output Video file Islam Abusa'a Software ISO ISO-9660 table see: List of ISO image software IST Digitrakker Instrument File AWAVE IT Impulse Tracker music file Impulse Tracker IT Settings intalk ITF Interface file JPI TopSpeed Pascal ITL iTunes music library ITN Itinerary file TomTom PNDs ITT IconTweaker Theme IV SGI Inventor IV-VRML Inventor VRML Format IVE OpenSceneGraph 3D model IVI Image file ImmerVision IVL Lensflare file ImmerVision IVP Panorama file ImmerVision IVU User Interface file ImmerVision IW Presentation flowchart IconAuthor - HSC InterActive IWA Text file IBM Writing Assistant IWD Call of Duty Map - Game Data Archive Activision, Inc. IWP Text file Wang IX data dtSearch index IZT Izl binary token file IZL [edit] J Ext. Description Used by J2C JPEG 2000 image JAM Jam messagebase FTN software JAM Jam music score Jam JAR Archive JAR. Java Games and Applications JAS see JASC JASC Graphics format (JASC) JAV see JAVA JAVA Java source code file JBD Datafile SigmaScan JBIG Joint Bilevel Image Group JBX Project file Project Scheduler 4 JCN JobClock.Net Synch File JET Fax Hybrid JetFax JFF see JFIF JFIF JPEG File Interchange Format JIF see JFIF JMS Music format (JMusic file) UltraForce JOB Gravostyle engraving pattern file Gravostyle/Gravograph JOB QUEUE output file RT-11 JOR Journal file SQL JOU Journal backup VAX Edt editor JP2 JPEG 2000 image JPC Graphics Japan PIC JPEG Joint Photography Experts Group graphics file format QPeg - FullView - Display JPG see JPEG JRE Java Runtime Environment Java JRN JMP journal JMP JSP Java Server Pages JS JScript script file Javascript JTF Fax Hayes JT Fax JTF Graphics (TIFF file with JPEG compression) JK Root File of a lol Earl Grey JVX Data JavaView object JW Text document JustWrite JWL Library JustWrite JZZ Spreadsheet Jazz [edit] K Ext. Description Used by K2A Data Prince of Persia 3D object K3D Description of macro language 3DS 3DS KAP Map Info Sea Chart KAR Music format (Karaoke) KAR Precompiled .prg for KARAT Rus. FOX+ 2.0 KB Keyboard script Borland C++ 4.5 KB Program source Knowledge Pro KBASIC Source KBasic KBD Keyboard mapping LocoScript - Signature - Procomm Plus KBM Keyboard mapping Reflection 4.0 KCL Lisp source code Kyoto Common Lisp KDB KeePass 1.x database file KeePass KDBX KeePass 2.x database file KeePass KDC Kodak Digital Camera (graphics) PhotoEnhancer by PictureWorks KEP (unknown) (unknown) KEX Kedit Macro File Kedit KEY Datafile Forecast Pro KEY Keynote presentation file Keynote (Apple iWork '08) KEY Keyboard macros KEY OS/2 archive .key-file (i.e. OS2.KEY) OS/2 KEY Security file e.g. Shareware Registration info KFX Kofax Group GCGW KIT Power Chords drum kit file Power Chord KMC KatzReview's MegaCrammer KML Kedit Macro Library / Keyhole Markup Language Google Earth KMY data KMyMoney KMZ Keyhole Markup Language (Zip compressed) Google Earth Knn Database key file Clarion KNO Personal Knowbase data file Personal Knowbase KPL source code Phrogram KPP Toolpad SmartPad KPS IBM KIPS bitmap graphics KR1 Kurzweil 2000 sample file AWAVE KR2 Kurzweil 2000 sample file AWAVE KRZ Kurzweil K2000 File Kurzweil KS Source code KonsolScript KS3 Data 3D Forgastest Editor object KTU Know The Unknown Online Service Packs Unknownsoft KYB Keyboard mapping FTP Software PC/TCP [edit] L Ext. Description Used by L LEX source code file L Linker directive file WATCOM wlink L LISP source code file LA0 Datafile SCUMM index file LAB Datafile NCSS - SOLO LAB Mailing labels Q+E for Microsoft Excel LAN Erdas image file LAN LAN Drivers Novell NetWare LAY Word chart layout APPLAUSE LBG Label generator data dBASE IV LBL Label dBASE IV - Clipper 5 - dBFast LBM Graphics format (Amiga) Pic-view - Deluxe Paint LBM Linear bitmap graphics XLib LBO Compiled label dBASE IV LBR .LBR Archive forCP/M and MS-DOS using the LU program LBR Display driver Lotus 1-2-3 LBT Additional (FPT) label description file FoxPro LBX Main (DBF) label description file FoxPro LCF Linker Control File Norton Guides compiler LCH Chart IBM Works for OS/2 LCK Lockfile Paradox LCL Data (FTP Software PC/TCP) LCL Data FTP Software PC/TCP LCN Lection WordPerfect LCS Datafile ACT! History Files LCW Spreadsheet Lucid 3-D LD Long Distance codes file Telix LDA Absolute binary file (load image) PDP-11, RT-11 LD1 Overlay file dBASE LDB Data filer database IBM Works for OS/2 LDB Overlay file Microsoft Access LDF Data filer form IBM Works for OS/2 LDF Library definition file Geoworks Glue LE DOS/4GW executable image DOS/4GW PM 32X DOS Extender LES Lesson (check *.cbt) LEV Level file NetHack 3.x LEX Dictionary Microsoft Word - Lexicon LFL LucasArts resource file LFD LucasArts resource file LucasArts games LFT Laser printer font ChiWriter LG Logo procedure definitions LSRHS Logo LGO Logo for header and footer SuperFax LGO Startup logo code Windows 3.x LHA Archive LHA/LHARC LHW Amiga archive LHWARP LIB Library file several programming languages LIC License file used by some programs to put their license on disk LIF Archive LIF CA Clipper packed file CA Clipper installer LIF Logical Interchange Format data file Hewlett-Packard LIM Archive LIMIT LIN Line types AutoCAD LIS Listing VAX LIT Web3D File Web3D LIX Log file (history) Audit Command Language (ACL) LJ Text file for HP LJ II printer LL3 LapLink III related file (document) LapLink III LM Auran Jet LOD mesh table (text file to control LODs) Trainz LMP Demo for Doom (computer 3d game) Doom - Doom2 LNG Language definition file LNK Linker response file .RTLink LNK Linker script LNK Windows 95 shortcut Windows 95 LNK Windows XP shortcut Windows XP LOD Load file LOG Log file Numerous systems LOM 3D Model Lock On: Modern Air Combat LPC Printer driver TEKO LRC Lyrics data LRF Linker response file Microsoft C/C++ LRF Unencrypted BroadBand eBook file Sony Librie eBook reader LRP Report IBM Works for OS/2 LRS Language Resource File WordPerfect for Win LRX Encrypted BroadBand eBook file Sony Librie eBook reader LSA Lightscape Technologies ASCII LSB Lightscape Technologies Binary LSP LISP source code file Xlisp, AutoLISP LSS Spreadsheet Legato - IBM Works for OS/2 LST Aus. BOM Hourly weather Data LST Filelist FRQView LST Keyboard macro 1st Reader LST List file (archive index - compiler listfile) LST Listing (e.g. source code) LST Map list Holux - Alan LST Spool file Oracle LST SLP output file RT-11 LTA Data LithTech ASCII 3D object LTM Form (Lotus Forms) Lotus LUA Lua script file Microsoft Visual C++, Notepad++ LWD Text document LotusWorks LWO Lightwave Object Format LWP Word processor IBM Works for OS/2, Lotus Wordpro LXF Lego Exchange Format Lego Digital Designer data file LY LilyPond Notation File LilyPond LYR Lyrics (ASCII) LZ Archive Lzip LZD Difference file for binaries LDiff 1.20 LZH Archive LHA/LHARC LZS Archive LARC LZW Archive LHWARP LZX Amiga Archive LZX [edit] M Ext. Description Used by M MATLAB M-File MATLAB M3U M3U playlist file WinAMP, XMMS M3U8 Unicode version of M3U playlist file (UTF-8) WinAMP, XMMS M4A Advanced Audio Coding M7P Multilizer 2007 and 2009 localization project file Multilizer MAI Mail VAX MAK Makefile MAK Project file VB - VC ++ MAN User guide (manual) MAP Color palette file MAP Format data Micrografx Picture Publisher MAP Linker map file MAP Map file (usually created by compilers) MAP Map Atlas MapMaker MAP Network map AccView MAP Game map for Duke Nukem 3D MAR Assembly program VAX Macro MAR Microsoft ARchive MSN Explorer (possibly other Microsoft products too) MAR Mozilla ARchive Mozilla Updater (used to house binary updates to products) MAS SmartMaster set Freelance Graphics MAT Data MATLAB MAX MAX source code file MB Memo field values for database Paradox MBK Multiple index file backup dBASE IV MBX Mailbox data Eudora/ZERBERUS MCC Configuration file Mathcad MCD MathCad file MathCad MCF Font file Mathcad MCF Photo book or photo calendar layout file FotoInsight Designer MCF Multimedia Container Format (predecessor of Matroska) MCI MCI command script Media Control Interface MCL Multi Edit macro library Multi Edit MCL Cartesian manipulator for laser systems MCP Application script Capsule MCP Printer driver Mathcad MCW Text file MacWrite II MDL Quake 1 Model File id Software MD2 Quake 2 Model File id Software MD3 Quake 3 Model File id Software MD5 Doom 3 and Quake 4 Model File id Software MD Archive mdcd10.arc MDA Data Microsoft Access MDA Microsoft Access system database Microsoft Access MDB Microsoft DataBase Microsoft Access MDF Several uses MDL Model 3D Design Plus or Simulink MDL Spreadsheet CA-Compete! MDM Modem definition file TELIX MDR Microdrive file ZX Spectrum emulator by g.a.lunter MDS Midi Session Sound Imp. MDT Data table Microsoft ILink incremental linker MDX Multiple index file dBASE IV MDZ Text description of music module Cubic Player - Cross-View ME MultiEdit configuration MultiEdit ME Text file READ.ME MEB Macro Editor bottom overflow file WordPerfect Library MEC MECCA source Maximus MED Macro Editor delete save WordPerfect Library MED Music format MED/OctaMED MEM Macro Editor macro WordPerfect Library MEM Memory variable save file dBASE IV - FoxPro - Clipper MEM Memos datafile Clarion MEQ Macro Editor print queue file WordPerfect Library MER Macro Editor resident area (vakioalue) WordPerfect Library MES Macro Editor work space file WordPerfect Library MES Message MET Document Omnipage Pro MET Macro Editor top overflow file WordPerfect Library MET OS/2 graphics metafile PICVIEW.EXE MEU Menu group DOS Shell MEX Macro Editor expound file WordPerfect Library MEX MEX file (executable command) Matlab MF Metafont file TeX MFA Source code file Multimedia Fusion 2 / The Games Factory 2 MFF MIDI Cakewalk, MTPro 4 MFM Music format DMP MGF Font Micrografx MGF Materials and Geometry Format MGX Designer 4.1 Drawing Designer 4.1 MHT Web Archive Single File MIB Snmp MIB file MID Standard MIDI file music synthetizers MIDI See MID MIFF Magick Image File Format MII Datafile MicroStat-II MIME Message in MIME format (RFC822) MIO MyInfo topic Milenix MyInfo MIS Mission, used by many games MIX Object file Power C MK Makefile MK Makefile MK Usually makefile MKE Makefile Microsoft Windows SDK MKG Makefile MKI Graphics format (Japan MKI) MKI Japanese graphics MAKIchan format MagView 0.5 MKS Data TACT MKV Matroska Multimedia Container Media Player Classic, Windows Media Player, Matroska Splitter ML3 Project Milestones 3.x MLB Macro library file RT-11, Symphony MLI 3DS Materials Libraries 3D Studio MLRAW Data Moonlight Creator RAW format 3D object MLV LabVIEW MathScript MM Text file MultiMate Advantage II MMF Mail message file Microsoft Mail MMM Multimedia movie file, RIFF RMMP format MacroMind Director 3.x MMO Memo writer file RapidFile MMP Output video format from Bravado board MND Menu source AutoCAD Menu Compiler MNG Map DeLorme Map'n'Go MNT Additional (FPT) menu description file FoxPro MNT Menu memo FoxPro MNU Advanced macro file HP NewWave MNU Menu AutoCAD Menu Compiler - Norton Commander - Signature MNU Microsoft Mouse menu (for DOS apps) MNX Compiled menu file AutoCAD MNX Main (DBF) menu description file FoxPro MNY Account book Microsoft Money MO? Packed mail FTN software MOB Device definition file PEN Windows MOBI eBook Mobipocket MOD Modula language source MOD MODULA-2 source code file Clarion Modula-2 MOD Module\u2014used by Windows for DLL which implement DOS support Win MOD Music format (Amiga module) DMP - ST - MDP - VP MOL MOD4WIN PlayList Mod4Win MOL MDL Molfile RasMol MOL2 Tripos\u2019 Sybyl MOL2 Format SYBYL, RasMol MON SYSGEN monitor build procedure RT-11 MON Monitor description ReadMail MOP MOPAC input file MOPAC, RasMol MOV Animation format (Mac) QuickTime MOV Movie file AutoCAD AutoFlix MP2 Mpeg audio file xing MP3 MPEG audio stream, layer 3 AWAVE, CoolEdit(+PlugIn) MP4 multimedia container format, MPEG 4 Part 14 MPA MPEG audio stream, layer 1,2,3 AWAVE MPC Calendar file Microsoft Project MPC Musepack audio MPEG multimedia containter format, video, audio MPEG Player MPG see MPEG MPKG Multipackage installer script Mac OS X MPL MediaRack Midi Playlist MediaRack MPM MathPlan macro WordPerfect Library MPP Project file Microsoft Project MPQ Mo'PaQ Archive Blizzard games MPR Generated executable menu file FoxPro MPR Multilizer 5.x and 6.x localization project file Multilizer MPT Bitmap graphics (Multipage TIFF) MPV View file Microsoft Project MPX Compiled executable menu file FoxPro MPX Video format MPZ Miradi Project Zipfile Miradi MRB Multiple Resolution Bitmap graphics file Microsoft C/C++ MRK Windows User Benchmark Win95 MRS Macro Resource file WordPerfect for Win MS Microsoft antivirus report MSAV MSC Microsoft C makefile MSI Windows Installer Package Windows Operating Systems MSDL Manchester Scene Description Language MSG Message base (e.g. HMB) MSG Message text file (ASCII) MSG ZVoice digitized voice file MSE Set file Magic Set Editor MSO Microsoft Word OLE Web Page Storage Stream Microsoft Office MSP Bitmap graphics file Microsoft Paint MSP Graphics format Microsoft Paint MSPRODUCER Media Project Microsoft Producer (for Microsoft PowerPoint XP/2003) Project MSQM data Microsoft Message Queuing MSN Project National Instruments for NI MultiSim-Electronic Circuit simulator MSS Manuscript text file Perfect Writer - Scribble - MINCE - Jove MST Document MS Test MST Minispecification file Prosa MST Setup script file Microsoft Windows SDK MSW Text file Microsoft Word MSX CP/M archive MSX MTH Math file Derive MTL Wavefront MTM Music format MultiTracker MTS Master Track Pro Files MTPro 4 MTS data F1 2001, F1 2002 and F1 Challenge 1999 - 2002 car physics (All from the EA Sports F1 Series) MTV MTV Ray Tracer graphic file MTW Datafile Minitab MU Quattro pro for DOS Menu definition file Quattro Pro MUS Finale music document. Finale MUS Music format (MIDI in Doom) MUS Sound file MusicTime MUZ Hover Game MIDI File Windows' Hover! Game [1] MVF Stop frame file AutoCAD AutoFlix MVI Movie command file AutoCAD AutoFlix MVO Data Mad Virgin 3D object MVW Log file Saber LAN MWF Animation ProMotion MWS MWave DSP synths instrument AWAVE MXF Material exchange format (RFC 4539, SMPTE 377M) MXL PackRat 5.0 support DLLs PackRat 5.0 MXM Material Maxwell Render MXP Adobe Extension File Adobe Dreamweaver and Adobe Flash MXP 3ds Max Configuration File 3ds Max MXP MasterCook exported recipe MXT Data Microsoft C MYP Presentation MM Make Your Point MZ Binary-format Map MazeEdit MZE Text-format Map MazeEdit MZG Binary-format Map Collection MazeEdit MZX Binary-format Encrypted Map MazeEdit [edit] N Ext. Description Used by NAM Name Space Modules Novell NetWare NAP Naplps file (VideoShow) EnerGraphics NAPLPS North American Presentation Layer Protocol Syntax NB Text file Nota Bene NB Wolfram Mathematica Notebook Mathematica NBF Nokia Backup File Nokia Mobile Phones NC Graphics netcdf NC Instructions for NC (Numerical Control) machine CAMS NC Non-error checking preprosessed Goc source code Geoworks NCC CNC (Computer Numeric Control) control file CamView 3D NCD Norton Change Directory support file Norton Commander NCP Re-volt Collision file Re-volt NDB Network database Intellicom - Compex NDS Nintendo DS ROM file used for Homebrew and commercial (Game) files on DS NDL Nodelist file NDX Index file dBASE II - III - IV - dBFast NEO Raster graphics file Atari Neochrome NES iNES ROM image format NET Network configuration/info file NEU Pro/Engineer neutral file format PTC Pro/Engineer netCDF Network Common Data Format NEW New info NFF Haines Neutral File Format NFF WorldToolKit Neutral File Format NFO Folioview database NFO Help format Nextpage Folio NFO Info file Compact NFO Viewer NG Hypertext Database Norton Guide NGO NG linker object file NGML NGS ; NG compiler source file NGC NIF netimmerse/gamebyro file NIL NIL Icon Hear-It NITF National Imagery Transmission Format NK2 e-mail address autocomplete archive Microsoft Office Outlook NL Norton Desktop Icon Library NLM Netware loadable module Novell Netware NLS National Language Support file MS-DOS NLX Form FormWorx 3.0 nnn Arj archive volumes up to 999 ARJ nnn Netware unicode rule table (e.g. 1250_Uni.036) Novell Netware nnn News about smth with ext. of ver. number nnn RAR archive volumes up to 999 RAR NOT Notation NOT Yard Notes File FYM NP Project schedule (Nokia Planner) Nokia Planner NPI Source for DGEN.EXE interpreter dBASE Application Generator NPJ Nile Project Game Mission Editor NRG Nero Disc Image File Nero Express / Burning ROM NRW Nikon Coolpix RAW image Nikon NSA media Nullsoft Streaming Audio NSF database Lotus Notes NSS Norton screensaver module NC - NDW Screen Saver NST Music module Amiga Noise Tracker NSV media Nullsoft Streaming Video NSX Compound index file SuccessWare SIX 3.00 NT Startup files Windows NT NTF database design template Lotus Notes NTH Nokia Theme File Nokia PC Suite NTR Executable ASCII text file (strip header and rename) netrun31.zip NTS Executable ASCII text file (strip header and rename) netsend1.zip NTS Tutorial Norton NTX Database index file Clipper 5 NUF Message for new users on their 1st call Procomm Plus NUMBERS Numbers spreadsheet file Numbers (Apple iWork '08) NWS Info text file (latest news) (ASCII) NXT Sound (NeXT format) [edit] O Ext. Description Used by O$$ Outfile Sprint O Object file UNIX - Atari - GCC O01 Typhoon vOice file AWAVE OAZ Fax NetFax Manager OB Object cut/paste file IBM LinkWay OBD Microsoft Office Binder MSOffice OBJ Compiled machine language code OBJ Object code Intel Relocatable Object Module OBJ Wavefront Object OBJF Data Triangle strips object OBR Object browser data file Borland C++ OBS Script ObjectScript OBT Microsoft Office Binder Template MSOffice OBV Visual interface ObjectScript OBZ Microsoft Office Binder Wizard MSOffice OCF Object Craft File Object Craft OCD OCAD Map File OCAD OCR Incoming fax transcribed to text FAXGrapper OCT Musical file Pctalizer OCX New Custom Control's format in VB 4.0 Visual Basic OCX OLE custom control ODB OpenDocument database OpenOffice.org Base ODF OpenDocument formula OpenOffice.org Math ODG OpenDocument drawing OpenOffice.org Draw ODIF Open Document Interchange Format ODL Object Description Language ODL Type library source Visual C++ ODM OpenDocument master document OpenOffice.org Writer ODP OpenDocument presentation OpenOffice.org Impress ODS OpenDocument spreadsheet OpenOffice.org Calc ODT OpenDocument text document OpenOffice.org Writer OFD Form definition ObjectView OFF Object File Format vector graphics file OFF Object File Format vector graphics OFM PostScript font description file OFN Microsoft Office documents Microsoft Office OGG Ogg multimedia container format OHB Source On Hand Basic OHS Outbound History Bink/+ OIF QuickBase file format OKT Music (8 channels) Oktalyzer OKT Music format Oktalyzer OLB Object library VAX OLD Backup file OLI Text file Olivetti OLSR Configuration file olsrd OMA Audio file Labelgate CD 2, MAGIQLIP2 OOF Data Outrage 3D Object Format (Descent) OOG Data WEBOOGL 3D object OOM Swap file Shroom OPJ Origin Project File Origin version 4.1 and later OPN Active options Exact OPT Options name used by many programs for configuration information OPT Delphi project options Borland Delphi OPT Optimize support file QEMM OPW Organization chart Org Plus for Windows OPX Inactive options Exact ORA Parameter file Oracle ORG Calendar file Lotus Organizer ORG Older Origin Project Origin versions 4 or earlier OTG OpenDocument drawing template OpenOffice.org Draw OTB Over-the-air bitmap graphics OTH OpenDocument HTML document template OpenOffice.org OTL Outline font description Z-Soft Type Foundry OTL Ventura Publisher's Type Foundry Outline Editor format OTP OpenDocument presentation template OpenOffice.org Impress OTS OpenDocument spreadsheet template OpenOffice.org Math OTT OpenDocument text document template OpenOffice.org Writer 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) TomTom Point of Interest 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) OXT OpenOffice.org extension OpenOffice.org [edit] P Ext. Description Used by P Database PROGRESS source code PROGRESS P PASCAL source code file P Parser source code file P Picture file APPLAUSE P Rea-C-Time application parameter file ReaGeniX code generator P0? Split archive UC2 SAS.EXE P10 Tektronix Plot GCGW P10 Certificate Request P12 Personal Information Exchange "Crypto Shell Extensions" P16 Music (16 channels) ProTracker Studio 16 P22 Patch file (Patch22) Patch22 P80 PLM-80 source P86 PLM-86 source p2v Backupfile of a project in eventplanning software plan2viz (windowsbased) P3T Playstation 3 Theme file PS3 Theme settings menu PA1 Worktable PageAhead PAC SBStudio II Package or Song SBStudio II PAC STAD Image (graphics ?) PACK PACKAGE Content The Sims 2 PAD Automatic print definitions Produa PAD Keypad definition Telemate PAF For Personal Ancestral File data files PAGES Pages document file Pages (Apple iWork '08) PAK Archive Pak PAL Palette file Microsoft Draw - Win. Paintbrush - many PAL Palette file Diablo II PAN Printer-specific file (copy to coreldrw.ink) CorelDRAW PAR Parameter file Fractint PAR PARTS application Digitalk PARTS PAR Permanent output file Windows 3.x PAR Parity Archive PAR2 Parity Archive v2 PART Part of a download file PAS Pascal language source Borland Pascal PAT Gravis Ultrasound Patch Convert (c) Villena PAT Hatch patterns AutoCAD - Photostyler PAT Vector fill files CorelDRAW PAT Pattern File Photoshop PAT GIMP pattern PB Fax FAXability Plus PB Phonebook WinFax Pro PB Proboard Conf. files Proboard PB Setup file PixBase PB1 Document First Publisher for Windows PBA Powerbasic BASIC source code Genus PBD Phone book FaxNOW! - Faxit PBD Molecule (protein data bank) PBI Powerbasic include file Genus PBI Profiler Binary Input Microsoft Source Profiler PBK Microsoft Network Phone book MSN PBL Powerbasic library Genus PBM PBM Portable Bit Map graphics format Jasc Media C. PBM Planar bitmap graphics XLib PBO Profiler Binary Output Microsoft Source Profiler PBT Profiler Binary Table Microsoft 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 PCA Perfect Clarity Audio Sony Vegas Pro PCB P-CAD database P-CAD, PCBExpress, and other Printed Curcuit Board design software PCB Artwork design file (Circuit board design) Zuken CadStar PCC Cutout picture vector graphics PC Paintbrush PCD Graphics format (Kodak Photo-CD) PCD Kodak Photo-CD Image graphics file (768x512) hpcdtoppm PCF Pixel Coordination Format PCH Patch file PCH Precompiled header Microsoft C/C++ PCJ Multimedia authoring tool graphics file IBM's Linkaway-Live PCK Pickfile Turbo Pascal PCL HP-PCL graphics data file HP Printer Control Language PCM OKI MSM6376 synth chip PCM AWAVE PCM PCM Authorware PCS Microsoft PowerPoint picture package Microsoft PowerPoint - Microsoft ClipArt Gallery PCT Bitmap graphics file Macintosh b&w PICT1 - color PICT2 PCW Text file PC Write PCX PC paintbrush bitmap format QPeg - Display - ZSoft - PC Paintbrush PDA Bitmap graphics PDB Data TACT PDB Packrat 5.0 data file Packrat 5.0 PDB Molecule (protein data bank) PDD Adobe Photoshop Elements Image Adobe Photoshop Elements PDE Pathology Data Exchange PDE data PowerDesk Encrypted PDF Adobe's Portable Document Format Adobe Acrobat Reader PDF Graphics file (ED-SCAN 24bit format) PDF Package Definition File PDF PCAD Database Interchange Format Pdifin.exe - Pdifout.exe PDF Print device information Netware PDG Print Shop Deluxe data file PDI Portable Database Image PDL Project Description Language file Borland C++ 4.5 PDM Program Deskmate PDM PowerDesigner's physical data model (relational model) file format PowerDesigner PDM Visual Basic (VB) Project Information File Visual Basic PDN Image file Paint.NET PDS PALASM Design Description PDS Pds graphics PDS Planetary Data System Format 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 PES Program Editor work space file WordPerfect Library PET Program Editor top overflow file WordPerfect Library pet package[2] Puppy Linux PEX Proboard EXecutable file (Executed from PB) Proboard PFA PostScript Font File PFA Type 3 font file (unhinted PostScript font) PFB Adobe Acrobat document Adobe Acrobat Reader PFB PostScript font Adobe Type Manager (ATM) PFC (Personal File Cabinet) contains e-mail, preferences and other personal information AOL 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) PFS PFT Printer font ChiWriter PG Page cut/paste file IBM LinkWay PGI Printer Graphics File device driver PGRAPH library PGL HP Plotter vector graphics format PGM Graphics format (Portable GrayMap) JASC Media C. PGM Program Signature PGP Support file Pretty Good Privacy RSA System PGS Manual page man4dos PH Optimized .goh file Geoworks PH Perl header file PH Phrase-table Microsoft C/C++ PHD PolyHedra Database PHM Phone book DN - Lync PHN Phone list UltraFax - QmodemPro PHO Phone database Metz Phone for Windows PHP PHP file PHP3 PHP 3 file PHP4 PHP 4 file PHR Phrases LocoScript PI2 Portrait Innovations High Resolution Encrypted Image file Portrait Innovations Studio2 (proprietary) PIC 123 Vector graphics format CShow - Alchemy - Paint (Pictor) PIC Bitmap graphics file Macintosh b&w PICT1 - color PICT2 PIC Lotus picture PIC PIXAR picture file SDSC Image Tool PICT Macintosh Picture PIE GlovePIE script file GlovePIE PIF OS/2 graphics metafile PICVIEW.EXE PIF Program Information File Windows 3.x PIF Vector graphics GDF format file (IBM mainframe computers) PiM Pascal Text Mode Image File The Ultimate Draw PIT Compressed Mac file archive created by PACKIT unpackit.zoo PIV Pivot Stick Animator file Pivot Stick Animator PIX Alias image file SDSC Image Tool PIX Inset Pix PJ Project CA-SuperProject PJT Additional (FPT) project description file FoxPro PJX Main (DBF) project description file FoxPro PK PacKed bitmap font bitmap file (TeX DVI drivers) PK Peak file Cool Edit PK2 Quake 2 data file id Software PK3 Quake 3 data file id Software PK4 Doom 3 and Quake 4 data file id Software PKA Archive PKARC PKG Installer script Next, Mac OS X, Sony PS3 PKG P-CAD database P-CAD PKT Fido message packet FTN software PL Palette Harvard Graphics PL Perl source code file PL Prolog source code file PL Property List font metric file TeX PL1 Room plan 3D Home Architect PL2 Palette Diablo II PL3 Chart palette Harvard Graphics 3.0 PLA Playlist PLB FoxPro library FoxPro PLB P-CAD library P-CAD PLC Add-in file (functions - macros - applications) Lotus 1-2-3 PLC P-CAD database P-CAD PLD PhotoLine Document PhotoLine image processing PLE Encrypted Chat Log Messenger Plus! Live Plugin - Log viewer PLIST Mac OS Property List Apple's Property List Editor PLL Prelinked library CA Clipper PLM DisorderTracker2 music module AWAVE PLN Spreadsheet WordPerfect for Win PLP Playlist PLP Messenger Plus! Sound Pack Messenger Plus! Live Plugin PLS Playlist file WarpVision (OS/2) PLSC Messenger Plus! Script Pack Messenger Plus! Live Plugin PLSK Messenger Plus! Skin Pack Messenger Plus! Live Plugin PLT HPGL plotter file vector graphics AutoCAD PLT Output file for ploter PLT P CAD: Output file editor for PCPLOT or PCPRINT P CAD PLT Page Magic 2.0 paper format Page Magic 2.0 PLT Palette PLT Table for .pll CA Clipper PLY Data PopMail PLY Presentation screen Harvard Spotlight PLY2 Data PLY2 object PLY ZipPack PM Auran Jet progressive mesh file (obsoleted by IM and LM) Trainz PM Perl module PM Bitmap graphics Presentation Manager PM3 PageMaker 3.0 data file PageMaker 3.0 PM4 Document PageMaker 4 PM5 Aldus PageMaker 5.0 publication Aldus PageMaker PMC Graphics A4TECH Scanner PMI OS/2 V3 SVGA PMI-File Svga.exe PMI PhatPad note PathWare PMM Program file Amaris BTX/2 PMP PhotoMorph Project PhotoMorph PN3 Printer device driver Harvard Graphics 3.0 PNG Portable Network Graphics PNF Pre-compiled Setup Information file Microsoft Windows PNM PBM Portable aNy Map graphics file PNT Macintosh painting PNT Pointlist segment FTN software PNT QWK reader pointer file MarkMail 2.x POH Optimized .goh file Geoworks POL InnovMetric Software Polygon Models Format POLICY Group Policy File Microsoft Windows POLY Data Patrick Flynn's Poly Format - 3D object POP Messages index PopMail POP Pop-up menu object dBASE Application Generator POT Microsoft PowerPoint template POV Raytraced graphics image Persistence Of Vision POW Power Chords instrument/song file Power Chords PP Amiga archive POWERPACKER PPA Microsoft PowerPoint Add-in PPB Button bar for Print Preview WordPerfect for Win PPD PostScript printer description file PPJ Premiere Project Premiere PPK Archive (using for many distributives) PPK PPL PolaroidPalettePlus ColorKey device driver Harvard Graphics 3.0 PPM Graphics format (Portable PixelMap) JASC Media C. PPO Preprocessor output CA Clipper 5.* PPP Publication PagePlus PPS Storyboard Personal Producer PPS Microsoft PowerPoint Slideshow (stand alone slideshow) PPT Microsoft PowerPoint Presentation Microsoft PowerPoint PPTX Office Open XML Presentation PR1 Packrat 4.0 data file Packrat 4.0 PR2 Packrat 4.x data file Packrat 4.x 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 PRE Presentation Freelance Graphics PRE Settings Programmer's WorkBench, Microsoft C/C++ PRE Stork graphic file PRF CheckIt Pro v1.0 data file CheckIt Pro 1.0 PRF Pixel Run Format graphics file Improces - Fastgraph PRF Printer driver dBASE IV PRF Profiler output PRG Program source code (e.g. Clipper language) CA Clipper PRG Program source dBASE IV - FoxPro - Clipper 5 - dBFast PRG Program Atari PRI Printer definitions LocoScript PRJ Borland C++ IDE project file BC.EXE - BCW.EXE PRK SimPark Saved File SimPark PRM Parameters PRN Printer driver Signature PRN Text file Lotus 1-2-3 - Symphony PRN Usually printer output file PRO Profile used by many programs to store configuration data PRO Graphics profile file DOS PRO Proboard conf. file Proboard PRO Prolog language source PRO PROLOG source code file PROJ Project File (Interface Builder) NeXT PROPERTIES Java properties file Java applications PROTO Message specification Google Protocol Buffers PRR The Perfect Resume data file Perfect Resume PRS Norton Viewer DLL file PRS Presentation Harvard Graphics Win PRS Printer Resource eg. fonts WordPerfect for Win PRS Procedure dBASE IV PRT P-CAD component P-CAD PRT Part or Drawing Cadkey PRT Printer driver Dr. Halo PRX Compiled program FoxPro PS Document in PostScript format adobe PSA Archive (Pretty Simple Archive) PSA.OUT (GNU) PSD Periscope Debbuger Def file Periscope PSD Photoshop bitmap file Photoshop document PSE see PSEG PSEG Bitmap graphics IBM printer Page SEgment PSF Outline PostScript printer font ChiWriter PSM Music format (Protracker Studio Module) Protracker - MASI PSM Symbol table of IDE Turbo Pascal PSM 3D Model 18 Wheels Of Steel PSN Presentation file for Sound Script Win PSP image file with layers Paint Shop Pro (all versions) PSQ Premiere Sequence Premiere PST Postbox file BMail PST Archive File Microsoft Outlook PSV Playstation 2/Playstation 3 saved game Playstation 2 and Playstation 3 PSW File w/ passwords for any program/game many PT Game crack Player Tools PT Kodak Precition Color Management System PT3 Device driver Harvard Graphics 3.0 PT3 Template PageMaker 3 PT4 Template PageMaker 4 PT5 Aldus PageMaker 5.0 publication template Aldus PageMaker PTB Power Tab Software Power Tab Editor PTB Script PubTech BatchWorks PTF Playstation Portable Theme file PSP Theme settings menu PTF ProTools Session File Digidesign ProTools PTG Panasonic Title Graphics PTL Premiere Title Premiere PTM Macro PubTech BatchWorks PTM Music format PTM Page Magic 2.0 template Page Magic 2.0 PTN Pattern Cadkey PTN Pattern CarveWright/CompuCarve Designer PTR OS/2 cursor image file ICONEDIT.EXE PTR QWK reader pointer file QMail PTU Performer Terrain Utilities PUB Package File Exstream Dialogue PUB Page template Microsoft Publisher PUB Public key ring file Pretty Good Privacy RSA System PUB Publication Ventura Publisher - 1st Publisher PUD Warcraft II Map file Warcraft 2 PUT Archive PUT PUT Graphics format WScan PVD Script Instalit PVL Library Instalit PVM Texture Files PVMEdit PVT Local Fidonet pointlist FTN software PW Text file Professional Write PWF Workflow Files Mac OS X Server Podcast Producer PWL Password List PWP Text document Professional WritePlus PX Paradox 3.0 file Paradox 3.0 PXP 3DS Process file 3D Studio PXR Pixiar Picio AltamiraComposer PXZ Compressed file to exchange media elements PSALMO PY Python script file Python interpreter PYC Compiled Python module Python interpreter PYI Cognos Powerplay Model PYO Optimized compiled Python module Python interpreter PZD Default settings Pizazz Plus PZI Graphics format PZP PZO Overlay file Pizazz Plus PZP Palette Pizazz Plus PZS Settings Pizazz Plus PZT Transfer file Pizazz Plus PZX Swap file Pizazz Plus [edit] Q Ext. Description Used by Q0 Q0 graphic file Q3S Data Quick3D Scene QAG Quick Access Group Norton Desktop QAP Application Omnis Quartz QB Tony Hawk's Pro Skater series scripting files QBB Quickbooks Backup File QBE Saved query (Query By Example) dBASE IV - Quattro Pro QBO Compiled query dBASE IV QBW Spreadsheet QuickBooks for Windows QCH Qt Compressed Help Trolltech Qt Assistant QDF Data file Quicken data file QDK Backup of startup files created by Optimize QEMM QDn Data file - segment n Omnis Quartz QDV Graphics file Steve Blackstock Giffer QDR Configuration file Q-Dir QEF Query file Q+E for Microsoft Excel QFX Quicken-specific implementation of the OFX specification Intuit Quicken QFX Fax QuickLink QHC Qt Help Collection Trolltech Qt Assistant QHCP Qt Help Collection Project Trolltech Qt Assistant QHP Qt Help Project Trolltech Qt Assistant QIF Quicken Interchange Format Intuit Quicken QIZ World book quiz World Book QLB Quick library Microsoft C/C++ QLC ATM Type 1 fonts script Adobe Type Manager 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 executable QBE query file FoxPro QRS Equation Editor support file WordPerfect for Win QRT Graphics format (QRT ray tracing) QRY Query dBASE IV QT QuickTime movie (animation) QTVR QuickTime VR Movie QVD QlikView Document (Data) QlikView Compressed Database File QVW QlikView Document (View) QlikView Presentation File QWK QWK reader message file QXD Document QuarkXPress QXL Element library QuarkXPress [edit] R Ext. Description Used by R Ratfor file R Script file R R00, R01, ... Part of a multi-file RAR archive. R2D Reflex 2 datafile Reflex 2 R8 Raw graphics file (one byte per pixel) plane one PicLab R8P PCL 4 bitmap font file Intellifont RA Remote Access conf. files RA RA0, RA1, ... Part of a multi-file RAR archive. RAD 2-op FM music Reality AdLib Tracker RAD Radiance RAL Remote Access Language file Remote Access RAM Ramfile RealAudio RAR Archive RAR RAS Graphics format SUN Raster RAT Datafile (RATS) RAW HSI raw graphic file RAW PCM Signed Raw Sound File RAW QRT graphic file RAY Rayshade RB Ruby Script file RBF Datafile Rbase RC Configuration file emacs RC Resource Compiler script file Microsoft C/C++, Borland C++ RC Resource Script Resource Writer RC UUPC configuration files UUPC RC Windows resource compiler script RC.EXE -Resource WorkShop - OS/2 RCG Netscape newsgroup file (netsc.rcg) RData Data file R RDF Compiled UIC source code Geoworks UI Compiler RDI Device-independent bitmap file (RIFF RDIB format) RDP RDP connection Remote Desktop connection RDX Datafile Reflex REC Archivation protocol ARCSERVE REC Datafile EpiInfo REC Record file Sprint REC Windows Recorder Macro File WinRecorder RED Path info Clarion Modula-2 RED REDuced nodelist file T-Mail nodelist Compiler REF Cross-reference REG OLE Registration file Windows 3.x REG Registration information or key REL Foreground job relocatable file RT-11 REM Remarks definition Sourcer REM Remarks REP QWK reader reply file REP Report file used by many applications REP Report Report Designer - CodeReporter - DataBoss REQ File request FTN Software RES Compiled resource Microsoft C/C++, Borland C++ RES DBASE resources dBASE IV RES Windows compiled resource package Win REV Revision file Geoworks REX PharLab executable file (old format) PharLab REX Report definition Oracle REX Rexx language source file Rexx REZ Resource file RF Sun raster graphics file RFT DCA/RFT Revisable Format Text file IBM DisplayWrite 4.0-5.1 RGB SGI RGB image file (RAW) SDSC Image Tool RGX Symbol tables etc. info ReaGeniX code generator RH Resource header file Borland C++ 4.5 RH Windows resource file header RC.EXE RHistory Command history logfile R RI Data Lotus 1-2-3 RIB Graphics (Renderman Interface Bytestream) 3D Reality RIC Fax Ricoh RIF RIFF bitmap graphics (Resource Interchange File Format) Fractal Design Painter RIP TeleGrafix Remote Imaging Protocol Maximus 3.0 RIX Graphics (ColoRIX Image File) ColoRIX RL4 Bitmap graphics RL8 Bitmap graphics RLA Wavefront raster image file SDSC Image Tool RLB Data hgw.rlb Harvard Graphics Win RLC Graphics 1bit/pixel scanner output RLD Norton Commander 5.0 temp file NC 5.0 RLD OSIMapDef. RecLoad Definition RLE Utah Run Length Encoded rasterfile graphic file SDSC Image Tool RLZ REALIZER source code file CA-Realizer RM Real Media Real Player RMB data RegistryMaster RMI Windows alternate synthesized sound format RIFF RMID format RMK Make file CA Clipper - RMAKE RMVB Real Media Variable Bitrate Real player RN XPL program for Nota Bene users RND Rendering Slide AutoCAD AutoShade Rnn Multi volume RAR archive RAR RNO Runoff file VAX ROL FM music Adlib Music File Roland ROM Read Only Memory image in emulators, AONs, etc. ROO CODASYL DBMS Database Root Oracle RPB Data report file used by CP Backup CP Backup RPD Database RapidFile RPF AutoCAD pattern ACAD RPL Text document Replica RPM Red Hat Package Manager (Command line driven package management system capable of installing, uninstalling, verifying, querying, and updating computer software packages in Red Hat Linux) Red Hat Linux RPT Report file used by many applications RRD Reduced Resolution Dataset ESRI (GIS) RS Data file Amiga Resource - Reassembler RS_ Resource fork of a Macintosh file Mac-ette RSC Resource file ViewMax - many RSL Application - Project resolver one RSL Resource Library used by PC Tools for Windows PC Tools - Win RSP Response file (text file containing input expected by eg. LINK) RSP Response File OS/2 RSY FLEXIT Multishot Survey Raw Data file FLEXIT RTF Rich Text Format text file (help file script) many - Microsoft Word RTFD RTF-Packet NeXT RTL HP RTL graphic file RTL Run-Time library Norton Utilities RTL Text file RTP RTPatch software update package data file Pocket soft patch RTS Realizer executable file RTS Runtime library file CA-Realizer RUL Echo-conference rules RUN PC Tools for Windows batch file PC Tools RUNZ pseudo-executable file, used in Portable Apps and software installers for Super OS RUNZ Framework RUS Russian text RV Mobile pricelist data file Mobile RVF TRichView RVW Review RWS Borland Resource Workshop symbol file Resource Workshop RWS Resource Workshop data file Borland C++ RWX Criterion RenderWare RWX MEME Shape File RWX Script RenderWare RWZ Microsoft Outlook Rules Wizard File Microsoft Outlook RXD Reflex 1 datafile Reflex 1 RZK File Crypt password file All text editors RZX File Crypt encrypted file File Crypt (Akte Krypta, Kriptirnik) [edit] S Ext. Description Used by S$$ Temporary sort file Sprint S ASSEMBLY source code file unix S Multi Edit macro file source Multi Edit S MSTS Shape file MSTS S19 Motorola ASCII format of executables S1K S1000 Simnet Format S3I Digiplayer/ST3 Sample File Digiplayer - ST3 S3M Music (16 channels) Scream Tracker 3.0 - DMP S7I Seed7 library / include file Seed7 interpreter and compiler SA? Packed mail FTN software SAB Saber file Star Wars: Jedi Knight Jedi Academy SAF see SAIF SAFE SafeIT Encrypted SAIF Spatial Archive Interchange Format SAL Datafile SORITEC SAN LucasArts' SMUSH/INSANE animation SAM Ami Pro data file Ami Pro SAM Text file Samna - Lotus Ami/Ami Pro SAR Archive SAR SAT ACIS SATS Static source ATS SAV Backup file (saved file) SAV Configuration SAV Executable RT-11 SAV SPSS "System File" PSPP SAV Saved game state Spider Solitaire (Windows) SAVER Screensaver Mac OS X SB Audio file (signed byte) SB Raw Signed Byte (8bit) data AWAVE SB Raw Signed PCM Byte 8bit data AWAVE SBD Storyboard Storyboard Editor SBI Sound Blaster Instrument file (Creative Labs) SBK Emu SoundFont Bank (AWE32 Bank) Convert (c) Villena SBL Stony Brook Pascal library SB Pascal SBP DML program Superbase 4 SBR Support file Source Browser SBT Notes related to record Suberbase 4 Windows SC Display driver Framework II SC PAL script Paradox SC Script Borland Paradox SC3 Renamed dBASE III screen mask file dBASE IV SC3 Screen device driver Harvard Graphics 3.0 SC4 Saved City SimCity 4 SC4 Game Scenario RollerCoaster Tycoon Deluxe/Expansion Pack SCA Datafile SCA SCC Text file SCD SCODOL film recorder (Scan Conversion Object Description Language) SCODOL SCF Standard Chromatogram Format Staden package SCF ? SimAnt or SimTown ?? SCF Windows Explorer Command (e.g.: show desktop.scf) Windows Explorer SCF Multimedia show ScoreMaker SCF Spelling checker configuration file Symphony SCH Project schedule Schedule Publisher SCH Circuit Design Schematic P-CAD - Orcad - Protel SchDoc Circuit Design Schematic Protel - Altium Designer SCI Fax SciFax SCI System Configuration Information SCM Scheme source code file SCM Schematic file (Circuit Diagram for PCB design) Zuken CadStar SCM Starcraft mission SCN SCeNe RTrace SCN Screen file Kermit SCO High score SCP Script BITCOM SCR Any other screen system SCR DEBUG source code file DOS Debug SCR Forth screen (source) file Forth SCR Screen - screen snapshot dBASE IV - Procomm Plus SCR Screen font LocoScript SCR Screen saver Windows 3.x SCR Screen snapshop SCR Script file source TeleMate - Kermit - 1st Reader SCT Additional (FPT) screen description file FoxPro SCTOR Raster graphics format used by some very obscure custom operating systems. SCX Chart Stanford Chart SCX Graphics format ColoRIX SCX Main (DBF) screen description file FoxPro SCX Starcraft: Brood War scenario SCY Security file ReaGeniX SD Sound Designer I audio file AWAVE SD7 Seed7 source file Seed7 interpreter and compiler SDA Fidonet's Software Distribution Network file archive description SDC Video DigimaxMaster - Samsung NV3 SDC Synopsys Design Constraints Electronic Design Automation Tools SDF Microsoft SQL Server Compact Edition database file SDF Flight data microdrones GmbH SDF Source definition file Sourcer SDF System Data Format file (fixed length ASCII text) SDI Software Distribution Network Info file SDK Roland S-550/S-50/W-30 Disk Image SDL Alias Wavefront Scene Description Language SDM Signed Differential Mapping brain maps and/or distributions Signed Differential Mapping SDML Spacial Data Modeling Language SDN Software Distribution Network compressd file archive pak251.exe SDR SmartDraw File SmartDraw Pro SDS MIDI Sample DUMP Standard File SDTS Spatial Data Transfer Standard SDW Ami Draw Symbol File SDX Sample DUMP Exchange File SEA Self-Extracting compressed Macintosh file Archive SEC compressed file SEC Diskreet encrypted file Diskreet SEC Secret key ring file Pretty Good Privacy RSA System SEC Secured animation file Disney Animation Studio SEN Scifer Archive Format ( Internal Header Mode] SEP Printer separator page SEQ ABI Text Sequence Applied Biosystems SEQ Atari animation file SEQ Video Tiertex video sequence SEQ Sequential Instruction File Bubble Chamber SES Session info Clarion Modula-2 SES Multitrack Audio Session info Adobe Audition SET Configuration file 1st Reader SET Driver sets created by Install Symphony SET Extension used by Norton Backup and CPS Backup for setup info Norton Backup - CPS Backup SET Hump Assignments File FYM SET Setup options file SET YVD card set file YVD SF IRCAM Sound File CSound package - MixView sound sample editor SF JAR Digital Signature SF WPS attribute storage (OS/2 WorkPlace Shell) wp_root.sf OS/2 WorkPlace Shell SF2 Emu SoundFont Bank v2.0 file AWAVE SFB HP Soft font (obsolete under Windows) SFD SoundStage Data file AWAVE SFF Scene File Format SFI Graphics SIS Framegrabber SFI Printer font (HP LaserJet landscape) Ventura Publisher SFL PCL 4 bitmap font (landscape) landscape - Intellifont -Ventura Publisher SFN Font SPX SFO Bitstream font file - fontware format SFP PCL 4 bitmap font portrait - Intellifont - Ventura Publisher SFR Sonic Foundry Sample Resource AWAVE SFS PCL 5 scalable font file Intellifont SFT Screen font ChiWriter SFX SFX (self-extracting archives) script RAR SG1 Graphics Stanford Graphics SGF Document with graphics Starwriter SGI Graphics file IRIS - Silicon Graphics SGP Statistics STATGRAPHICS Plus SGT Save/get keyboard macro Signature SH ASCII archive SHAR SH Unix shell script SH3 Presentation Harvard Graphics 3.0 SHAR Archive UNSHAR (Unix) SHB Background CorelShow SHG Segmented Hyper Graphics Microsoft's shed.exe, JGsoft's Hotspot Builder, EC Software's Help and Manual SHK Apple II archive SHRINKIT SHM Shell macro WordPerfect Library SHP Shape file and source file for text fonts ESRI shapefile AutoCAD ArcGIS SHR see SHAR SHT HTML format for WWW NetScape SHW Presentation Harvard Graphics 2.0 - CorelShow SHW Slide show WordPerfect Presentations SHX Shape entities ESRI shapefile AutoCAD ArcGIS SIB Sibelius file Sibelius 1-5 SIF Setup Installation Files info Windows NT Setup SIG Current program settings Signature SIG Signature file ThunderByte AntiVirus - PopMail SIK Backup file (Sicherungskopie) Microsoft Word SIM Simon document file - Simon instruction software editor SIS symbian file SIT Archive (Macintosh) STUFFIT SKP Google SketchUp file SKY SYLK Spreadsheet file (used by Multiplan) SL S-Lang source code file SLB P-CAD library (symbols) P-CAD SLB Slide library AutoCAD SLC SALT (script from Telix) compiled code Telix SLD Slide AutoCAD SLDPRT Part SolidWorks SLDASM Assembly SolidWorks SLDDRW Drawing SolidWorks SLI Slide MAGICorp Slide Service SLK Microsoft Excel import format Microsoft Excel SLK SYLK Symbolic Link format data file MultiPlan SLL Sound data file SLP SLP command file created by SRCCOM RT-11 SLP Localization project file Sisulizer SLT SALT Script Application Language for Telix script source Telix SLV Solution for any game many SM Maillist SoftSpoken Mailer SM Script ScriptMaker SM SMALLTALK source code file SM Text file Samna Word SM StepMania Step File StepMania SMC Super Nintendo ROM SMF Fax SMARTFAX SMK Smacker Video Format (RAD Video) SML System Macro Library RT-11 SMM Ami Pro Macro File Ami Pro SMN Font (ParaGraph's WorkScript format) SMP Sample (sound file) SMP Samplevision File Samplevision SMPL Data Megahedron 3D object SMS MSTS Sound managemant system file MSTS SMT Text file Smart Ware II SN Compressed song file Sound Club editor SND Digitized sound file Macintosh/ATARI/PC SND Power Chords drum sound file Power Chord SNDB SQLNotes database SQLNotes SNG Song (midi sound) Midisoft Studio - Prism SNO SNOBOL4 source code file SNP Book-shelf for .BOO READIBM SNP Microsoft Access report snapshot SNP Output video format from Computer Eyes equipment SO shared object, dynamically linked library Unix SOAR Soar Production file SOL Solution eg. game walkthroughs SOM Network serial numbers Quattro Pro SOM Sort information Paradox SON Song SBStudio II SOU Temporary BATCH file RT-11 SOU SBStudio II Sound File SBStudio II SOU Sound data (sound tool) SP Archive (unix) SPLINT SPC Program Microsoft Multiplan SPC Temporary file WordPerfect for Win SPC SNES SPC-700 Sound File Super Jukebox SPC Spectroscopic data (scientific) Thermo Scientific SPD Scalable font Speedo - Harvard Graphics 3.0 SPF Slide presentation file EnerGraphics SPF data SQR Portable Format SPG Glossary Sprint SPI Graphics (Siemens and Philips scanner) SPIFF Still Picture Interchange File Format SPIN Spin source file Parallax Propeller Microcontrollers SPL Archive SPLINT SPL Customized printer driver Sprint SPL Divided file segment Slice SPL Personal spell dictionary Signature SPL Print spooling file Windows 3.x SPL Sample SPM Data wp{wp}.spm WordPerfect SPP Printer file Sprint SPR Document letter Sprint SPR Generated executable screen file FoxPro SPR Sprite SPR Story Board sprites SPS Exported SyncBack profile SyncBack SPS Screen driver Sprint SPS SPSSx source code file VAX/VMS SPT Data support file (MITAC disk/system management utility pack) MITAC disk/system management utility pack SPT SPITBOL source code file SPW Worksheet SigmaPlot SPX Compiled executable screen file FoxPro SPX Ogg Speex bitstream[3] Xiph.Org_Foundation SQD Squish message base Squish SQI Squish message base index Squish SQL SQL language code Any SQL database SQL Squish message base lastread pointers Squish SQM Windows Live Messenger log file SQN Note file SquareNote SQZ Archive SQUEEZE SQZ FOXPRO Squeeze file FOXPRO SRC Source code Aurora Compiler SRC Multi-edit source Multi-Edit SRC Source DataFlex SRF Sun Raster File graphics file SRP Script QuickLink SRT Subtitle format SubRip SS Bitmap graphics Splash SS Screen saver DN SSC Celestia Solar System Catalog file Celestia SSD Datafile SAS/PC SSF Graphic file SnagIt Studio File/PC SSG Saved game Simsig SSP Datafile SAS Transport SSR FLEXIT Singleshot Survey Raw Data file FLEXIT SST AVHRR graphic file SSV Spreadsheet viewer file ST Instrument library Scream Tracker ST SMALLTALK source code file Little Smalltalk ST Stamp NeoPaint STA Data file Statistica STA Saved state Reflection 4.0 STA Stack Spinmaker Plus STB Symbol table file RT-11 STB Stub library Genus GX Kernel STC Celestia Star Catalog file Celestia STC OpenOffice.org 1.*spreadsheet template OpenOffice.org Calc STD State Transition Diagram graphic file Prosa STD OpenOffice.org 1.*drawing template OpenOffice.org Draw STF Archive SHRINKTOFIT STF Setup Table File STI OpenOffice.org 1.*presentation template OpenOffice.org Impress STK eBook Starebook STL Stereolithography Interface Format STM Music format (4 channels) (Scream Tracker Module) ST - DMP STM State Transition Diagram model file Prosa STO Pascal stub OBJ file Genus GX Kernel STP Subtitler Project Belle Nuit Subtitler STR Gate3 table structure file STR Structure list object file dBASE Application Generator STR Playstation video file STS Music format (Scream Tracker Song) ST 2.0-2.3 STS Project status info Microsoft C/C++ STU Studio Project Pinnacle Studio (video editing software) STW Data file SmartTerm for Windows STW OpenOffice.org 1.*text document template OpenOffice.org Writer STX Electronic book SmarText STX Music format STX Tax form CA-Simply Tax STY Ami Pro Template (Style); used by other programs for `styles` Ami Pro STY Style library or sheet many SU? Packed mail FTN software SUB Subtitle format SubViewer; Author David Dolinski SUI SUIT library Simple User Interface Toolkit SUM Summary SUN Sun rasterfile graphics file SUO Solution User Options for Microsoft Visual Studio SUP Supplementary dictionary WordPerfect for Win SVD Autosave file for document Microsoft Word SVG Autosave file for glossary Microsoft Word SVG Scalable Vector Graphics, many SVQ Music format SVS Autosave file for style sheet Microsoft Word SVW Super Video Windows Conversion Artist SVX Interchange, 8SVX/16SV AWAVE SVY FLEXIT Survey data FLEXIT SW Raw Signed Word (16bit) data AWAVE SWF Shockwave Flash Macromedia SWG SWAG Pascal Snippets file SWAG SWP Document backup Sprint SWP Swap file SWT Hump Routes File FYM SXC OpenOffice.org 1.*spreadsheet OpenOffice.org Calc SXD OpenOffice.org 1.*drawing OpenOffice.org Draw SXG OpenOffice.org 1.*master document SXI OpenOffice.org 1.*presentation OpenOffice.org Impress SXM OpenOffice.org 1.*formula OpenOffice.org Calc SXP 3DS Process file 3D Studio SXW OpenOffice.org 1.*text document OpenOffice.org Writer SY1 SmartPix symbol library Ami Pro SY3 Harvard Graphics format SY3 Symbol file Harvard Graphics 3.0 SYD Backup of startup files created by QEMM (?) autoexec.syd SYD Sysedit backup file Sysedit SYG Monitor and handler files created by SYSGEN RT-11 SYM Compiler symbolic information file SYM P-CAD component (symbols) P-CAD SYM Precompiled headers Borland C++ SYM Program symbol table Power C, Microsoft ILink incremental linker SYM Symbol file Harvard Graphics 2.0, Microsoft Windows SDK SYN SDSC Synu image file SDSC Image Tool SYN Synonym file Microsoft Word 5 SYS Datafile SYGRAPH - SYSTAT - SPSS/PC SYS System file - device driver or hardware configuration info DOS SYW Graphics file (symbol) Harvard Graphics Win SYW Yamaha SY-85/SY-99 Wave File Convert (c) Villena [edit] T Ext. Description Used by T Archive without compression (tape) tar T TADS source T Tester symbol table ReaGeniX code generator T?H Turbo Help file (Pascal, C, Assembler, ...) Borland Thelp T$M ??? - Found in Windows (Vista) temp folder c:\windows\temp T2B Bookeen Cybook thumbnail Cybook T2L True2Life file format 3D Internet content developers T44 Temporary file for Sort or Index dBASE IV T64 Program C64S emulator TAG Query tag name DataFlex TAH Help file for Turbo Assembler Borland C++ TAL Adobe Type Align Adobe TAL Text illustration TypeAlign TAP Tape file ZX Spectrum emulator by g.a.lunter TAR Archive TAR TAZ Archive WinZipNT - TAR - COMPRESS TB Tab file (Virtual Desktop Tab) Tabbery TB1 Font file Borland Turbo C TB2 Font file Borland Turbo C TBF Fax Imavox TurboFax TBK FOXPRO template backup file FOXPRO TBK Memo backup dBASE IV - FoxPro TBK Toolbook Asymetrix ToolBook TBL Short for Table used by many programs TBL Aldus TableEditor file TableEditor TBL Gate3 table file TBL Graphics file (native format) PageMaker TableEditor TBL Table of values OS/2 TBR Norton Desktop custom toolbar NDW TBS Text elements ?? (Textbausteine) Microsoft Word TBX Table Project Scheduler 4 TBZ Archive WinZipNT - TAR - Bzip2 TC Configuration Turbo C - Borland C++ TCH Help file Turbo C - Borland C++ TCL Tool Command Language source code Swat TCT Drawing Template TurboCAD for Windows TCW Native Drawing File TurboCAD for Windows TD Config from Turbo Debugger Turbo Debugger TD0 Compressed diskette in a file Teledisk TD2 Configuration file Turbo Debugger for Win32 TDB Database TACT TDDD Imagine Object File Format TDF Speedo font file TDF Typeface definition file Speedo TDH Help file for Turbo Debugger Borland C++ TDK Keystroke recording file Turbo Debugger TDR Contens of Arvid tape TDS Symbol table Turbo Debugger TDT Thumbnail data AVCHD TDW Configuration file Turbo Debugger for Windows TEC Data TECPLOT output TEC TECO macro file ("compiled" form) TECO TEF Fax Relisys TEFAX TEL Host file Telnet TEM Input template IconAuthor TEM Turbo Editor Macro Language script Borland C++ TERM Terminal File TES TECO macro file (source form) TECO TET Tetris results DN TEX Datasheet Idealist TEX TeX text file Scientific Word - TeX TEX Image Slimtex TEXT Text file TF Configuration Turbo Profiler TFA Area file Turbo Profiler TFC Catalogue file Tobi's Floppy Cataloguer TFF self executing TansForm dialogue TansForm TFH Help file for Turbo Profiler Borland C++ TFM Tagged font metric file Intellifont TFM TeX Font Metric file TeX TFS Statistical information Turbo Profiler TG1 Project file On Target TGA Targa True Color bitmapped format Paint.NET TGZ Archive WinZipNT - TAR - GNUzip TH? Packed mail FTN software THE Windows'95 Desktop Theme Microsoft Plus THM Thumbnail or Theme File Picture Publisher, PhotoMagic, Canon Digital Cameras, and Sony Digital Cameras will create these Thumbnail files. Also using the same file extension is Sony Ericsson Theme File, for a cell phone. THS Thesaurus dictionary WordPerfect for Win TIB Acronis True Image Backup Acronis True Image TIC FTN special file with assotiated file description ALLFIX TIF see TIFF TIFF TIFF (tagged image format file) bitmapped file Alchemy - PhotoStyler -PageMaker - CorelDRAW TIL Fuzzy logic knowledge base Togai InfraLogic Fuzzy-C Compiler TIS Tile set MahJongg 3.0 TJL Backup file VAXTPU editor TLB Interoperability Type Library Win95 TLB Reference table Bubble Chamber TLB Text library VAX TLB Type library Visual C++ TLC Compiled Tool Command Language source code Swat TLD Disk Image Teledisk TLH Typelib Generated C/C++ Header Visual C++ TLP Project TimeLine TM2 Typical Meteorological Year data (new) Typical Meteorological Year TMF Tagged Font Metric file WordPerfect for Win TMF TiVo movie TiVo TMO ZTG global optimizer default output file Zortech C++ TMO HandsHigh ThoughtManager Outline ThoughtManager Desktop TMP Temporary file ALL PROGRAMS TMS TeleMate compiled script TeleMate TMY Typical Meteorological Year data (old) Typical Meteorological Year TMY2 Typical Meteorological Year data (new) Typical Meteorological Year TOC Table Of Contents text file (ASCII) TOK Borland C++ 4.x reserved word list BCW.EXE TOPC TopicCrunch SEO Project file holding keywords, domain and search engine settings (ASCII) TORRENT TORRENT File \u03bcTorrent TOS Character file The Only Sheet TOS Self-extracting file archive (Atari ST) TP Session-state file Turbo Profiler TP Turbo Pascal cfg file Turbo Pascal TP TinkerPlots Document TinkerPlots and Fathom Dynamic Data Software. Documents contain data tables, graphs, text, pictures, etc. TP3 Template Harvard Graphics 3.0 TPB Downloadable PCL Soft font file backup HiJaak TPC File produced when an inter-Topicscape topic link file is exported to Windows 3D Topicscape TPF Downloadable PCL Soft font file HiJaak TPF Print data in EMF format ThinPrint TPH Help file Turbo Pascal TPL Resident units library Turbo Pascal TPL Template file GoldEd -ITrack TPL Template Harvard Graphics 2.0 TPOLY Data TPOLY 3D object TPP Protected Mode Units Borland Pascal 7.0 TPU Borland Pascal DOS Mode Library Borland Pascal TPU Command file (VAXTPU editor) VAXTPU editor TPW Borland Pascal Windows Library Borland Pascal TPW Session-state file Turbo Profiler for Windows TPZ Archive TAR - GNUzip TR Man page input suitable for troff -man cawf2.zip TR Session-state settings Turbo Debugger for DOS TR2 Session-state settings Turbo Debugger for Win32 TRC Debug support file Power CTrace TRE Directory tree file PC-Tools TRD Datafile TrID file identifier filetypes definitions package TRIA Data Greg Hood's ASCII Triangle TRIB Data Greg Hood's Binary Triangle TRIF Tiled Raster Interchange Format TRK Track (i.e. video sequence), used by many games TRM Terminal settings Windows 3.x TRN Translation support file Quattro - Clarion TRS Executable file Micrografx or password file TRS WiSo Mein Geld 2007 TRS IBM Mainframe log file TRSMAIN TRU True Basic source file TRW Session-state settings Turbo Debugger for Windows TRY Typical Meteorological Year data (variant) TRNSYS TS Qt Linguist TS File Trolltech Qt Linguist TSE Data Light Map Maker ASCII Scene TSK Microsoft Multimedia Task Application Win95 TSM Turbo Assembler Manual TASM for OS/2 TST Printer test file WordPerfect for Win TSV Tab Separated Values TTF TrueType Font file TU? Packed mail FTN software TUD The Ultimate Draw file The Ultimate Draw TUT Tutorial TV Table view settings Paradox TVF Table view settings dBASE TVn Overflow file above insert point in Doc n WordPerfect for Win TXF Tax eXchange Format TXI Support file TeX TXT Common name for ASCII text file TXT Tab-Delimited Text File Microsoft Excel TXW Yamaha TX-16W Wave File Convert (c) Villena TY TiVo movie TiVo TYM Time Stamp (PageMaker 4) PageMaker 4 TZ Archive TAR - COMPRESS TZB Archive TAR - COMPRESS - BTOA TZL Tanzzle pattern file Tanzzle TZX Tanzzle image file Tanzzle [edit] U Ext. Description Used by U3D Model file format Ultimate 3D U3D Universal 3D Adobe Acrobat U8 Sample UB Raw Unsigned Byte (8bit) data AWAVE UC2 Archive UC II UCN New archive UC II UCS Unknownsoft Service Pack (mainly for Shadow OS 2009) Unknownsoft Computer Systems UDF Filter Photostyler UDO Data Moray User Defined Object UDW Raw Unsigned DWord data AWAVE UE2 Encrypted archive UC II UFI data UFO CaptureV2 settings UHA UHarc archive UHS Universal Hint System (binary file) UI Espire source code file Geoworks UI Compiler UI Qt Designer's UI File Trolltech Qt Designer UI User interface Sprint UIF Long prompts for windows WordPerfect for Win UIH Espire header file Geoworks UI Compiler UL ULAW audio file ULD Information about uploaded files Procomm Plus ULF data MRF Mapping Tool Kit Universal List Format ULT Music UltraTracker UMB Backup file MemMaker UNF Universal NES Image Interchange File Format UNI Datafile Forecast Pro UNI Music format UNIMOD - MIKMOD UNIF Universal NES Image Interchange File Format UNX Text file containing UNIX specific info UOML UniqueObject Markup Language (UOML) is a XML-based markup language UOP Uniform Office Format presentation UOS Uniform Office Format spreadsheet UOT Uniform Office Format text UPD Update data dBASE UPO Compiled update data dBASE URL Internet Shortcut (URL) Windows Explorer URT Utah Raster Toolkit USE Log file USP Printer font with USASCII extended character set PageMaker USR User database file Procomm Plus - Turbo C++ tour UT! datafile uTorrent UTZ Mobile Phone Theme Sony Ericsson UU Encoded file (ASCII) UUENCODE/UUDECODE UUE Encoded file (ASCII) UUENCODE/UUDECODE UW Raw Unsigned Word 16bit data AWAVE UWF UltraTracker WaveSample UltraTracker [edit] V Ext. Description Used by V Consistency check support file ReaGeniX code generator V Main input file for an image Vivid 2.0 V8 Covox 8bit file AWAVE V10 Data Gouraud Shaded Vectors V2D Voucher design file Voucher management included in JFire (e.g. when printing a voucher) VAI multimedia PhotoDub document VAL Validity checks and referential integrity Paradox for Windows VAL Values list object file dBASE Application Generator VALA Sourcecode Vala VAN Animation VistaPro VAP Value Added Process NetWare 2.xx VAP Dialogic indexed adpcm voice file VBASE/40 VAR Variable file IconAuthor VB Visual Basic .Net source file Visual Basic .NET VBPROJ Visual Basic .Net Visual Studio 2003 Project File Visual Studio .NET 2003 VBR Visual Basic Custom Control file Visual Basic VBS VBScript script file VBScript VBX Visual Basic eXtension Visual Basic VBZ Visual Basic Setup Wizard Template Setup Wizard VC6 Graphite - 2D and 3D drafting Ashlar-Vellum VC Include file with color definitions Vivid 2.0 VC Spreadsheet VisiCalc VCA Visual Clip Art VCD VideoCD VCD VirtualDrive CD Image File VCD VisualCADD Drawing File VCR VCR drivers for Arvid VCW Visual workbench information Microsoft Visual C++ VCX Spreatsheet VisiCalc Advanced VDA Bitmap graphics VDO Story Board video image Story Board VDR Drawing ComputerEasy Draw VEG Vegas Project Sony Vegas VEW GroupWise for Windows Win VEW View file Clipper 5 - Lotus Approach VFA FontLab Database file FontLab VFM Ventura Font Metrics file VFM Voting Form Voter VFN Voting Form for Customers Voter VGA VGA display driver VGA VGA display font VGD VGA display driver Generic CADD VGR Graphics file Ventura Publisher VI LabVIEW Virtual Instrument LabVIEW VI Graphics file Jovian Logic VI VI Watcom editor script VI.EXE VIC see VICAR VICAR Graphics (Video Image Communication and Retrieval) VID Bitmap graphics (YUV12C M-Motion Frame Buffer) VID Graphics format Word&Deed VID MS-DOS Shell Monitor file MS-DOS 5 VID Screen device driver Word VIF see VIFF VIFF Khoros Visualization Image File Format SDSC Image Tool VIK Graphics format (VIKING) VIM Vim script file Vim text editor VINF data ReMPEG log file - frames info VIR Virus or infected file VIS VIS graphics file VLM Virtual Loadable Module Netware VM Virtual Memory file Geoworks VMC Virtual memory configuration DOS/4GW PM 32X DOS Extender VMDK Virtual Disk file VMware VMF Font characteristics Ventura Publisher VMG Nokia message file format Text Message Editor (Nokia PC Suite) VMS Text file containing VMS specific info VO Include file with object definition Vivid 2.0 VOB Video Object DVD-R, DVD-RW VOC Sound format (Creative Lab's Sound File) PlayVoc VOF Object folder VZ Programmer VOP Visual Orangator Project VOP Visual OTTHYMO Project VOX Dialogic adpcm file AWAVE, CoolEdit VP 3DS Video posting 3D Studio VPF Vector Product Format VPG Graphics file VPGraphics VPH Virtual Pascal Help VP/OS2 VPI Virtual Pascal Unit VP/OS2 VQA Vector Quantized Animation The Legend of Kyrandia VRM Overlay file QuattroPro VRM Visual rexx source WATCOM VREXX VRML Virtual Reality Modeling Language NetScape VRP Project WATCOM VX?Rexx VRS Video Resource eg. video device driver WordPerfect VS Include file with surface definition Vivid 2.0 VSD Diagram Shapeware Visio VSD Visio drawing Visio VSM Simulation model VisSim VSP Sprite SPX VSS SmartShapes file Shapeware Visio VSS Visio Template Visio VST Truevision Vista graphics file VST Visio Template Visio VUE Animation 3D Studio VUE View dBASE IV - FoxPro VW Text file Volkswriter VWR File viewer file PC Tools VWX CAD File VectorWorks 2008 VXD Windows 3.x virtual device driver Windows 3.x [edit] W Ext. Description Used by W Word chart file APPLAUSE W01 Yamaha SY-series wave files AWAVE W01 Yamaha TX16W wave file AWAVE W30 Printer font AST TurboLaser - Ventura Publisher W31 Startup file Windows 3.1 W3A Warcraft 3 Abilities Export File Contained in a Warcraft 3 map W3B Warcraft 3 Destructables Export File Contained in a Warcraft 3 map W3D Warcraft 3 Doodads Export File Contained in a Warcraft 3 map W3G Warcraft 3 Replay File File for Warcraft 3 W3H Warcraft 3 Buffs Export File Contained in a Warcraft 3 map W3M Warcraft 3 Map File for Warcraft III: Reign of Chaos W3N Warcraft 3 Campaign File for Warcraft III: The Frozen Throne W3O Warcraft 3 Object Data Export File Contained in a Warcraft 3 map W3P Warcraft 3 Save Save File for Warcraft 3 W3Q Warcraft 3 Upgrades Export File Contained in a Warcraft 3 map W3T Warcraft 3 Item Export File Contained in a Warcraft 3 map W3U Warcraft 3 Unit Export File Contained in a Warcraft 3 map W3V Warcraft 3 Save Save File for Warcraft 3 W3X Warcraft 3 Expansion Map File for Warcraft 3: The Frozen Throne W3Z Warcraft 3 Save Save File for Warcraft 3 W40 Something for Windows95 (e.g. config.w40) Win95 W44 Temporary file for Sort or Index dBASE W95 Something for Windows95 Win95 WAD War Allocation Daemon Doom - Doom2 WAG Yard Contents File FYM WAI Warcraft 3 AI Data File Warcraft 3 AI Data File WAR Java Web Archive A Java file format used to package and deploy web applications. WAS ProComm Script File (source code) ProComm WAV Sound format (Microsoft Windows RIFF WAVE) Media Player WAX ProComm compiled script ProComm WB1 Notebook Quattro Pro WB2 Spreadsheet Quattro Pro WBF Microsoft Windows Batch File Catch WBK Document/workbook or Microsoft Word backup file WordPerfect for Win or Microsoft Word WBT Norton Desktop Norton Desktop WBT Wilsonware Batch file Winbatch WCD Condes Event Data file Condes WCD Macro token list WordPerfect for Win WCH WordPerfect Macro Facility WP WCM Data transmission file Microsoft Works WCM Macro WordPerfect for Win WCP Product information description WordPerfect for Win WD InfoSelect Data file WDB Database Microsoft Works WDM Admin tool connection definition War FTP WE? Packed mail FTN software WEB WEB source code file Web Easy Professional WebOOGL Web Object Oriented Graphics Library WFB Turtle Beach WaveFront Bank AWAVE WFD Turtle Beach WaveFront Drum AWAVE WFM Form object dBASE Form Designer WFN Font CorelDRAW WFP Turtle Beach WaveFront Prog. AWAVE WFT Web Family Tree GRAMPS WFX Data file Winfax WG1 Worksheet Lotus 1-2-3/G WG2 Worksheet Lotus 1-2-3 for OS/2 WID Width table Ventura Publisher WIM Windows Imaging Format ImageX WIN Window file FoxPro - dBASE WIREFRAME Data EMSE mesh WIX Windows Installer XML WiX WIZ Page wizard Microsoft Publisher WK1 Spreadsheet Lotus 1-2-3 version 2.x - Symphony 1.1+ WK3 Spreadsheet Lotus 1-2-3 version 3.x WK4 Spreadsheet Lotus 1-2-3 version 3.4 WKB Document WordPerfect for Win WKE Spreadsheet Lotus 1-2-3 educational version WKI Spreadsheet format Lotus 123 2x WKQ Spreadsheet Quattro WKS Spreadsheet Lotus 1-2-3 version 1A - Symphony 1.0, Microsoft Works WKS Workspace Xlisp WKZ Spreadsheet format Dos Navigator WLK Graphics Virtus Walkthrough WLK Walk Through for any game many WMA Windows Media Audio audio file WMC Backup of startup files by Windows MathCad autoexec.wmc MathCad WMC Macro file WordPerfect for Win WMC Text file WordMARC WMDB Windows Media Player database Windows Media Player WMF Windows MetaFile vector graphics WIMP Graphics (Windows Magic Icon Palette) WMV Windows Media Video video file WN Text NeXT WriteNow WNF Corel Draw Font File CorelDraw WOA Swap file Windows 3.x WOC Organization Windows OrgChart WOW Music (8 channels) Grave Mod Player WP Word Perfect Format WP WP5 Document WordPerfect 5.x WPD Document WordPerfect 6.0 - PFS:WindowWorks WPD Windows printer driver (uninstallable) Windows WPF Fax WorldPort WPF Form WordPerfect WPG WordPerfect Graphics vector graphics DrawPerfect WPJ Watcom C/C++ IDE project IDE.EXE WPK Macros WordPerfect for Win WPL MediaRack Wave Playlist MediaRack WPL Windows Media Playlist, for Windows Media Player WPM Macros WordPerfect WPS Text document Microsoft Works WQ! Compressed spreadsheet Quattro Pro WQ1 Spreadsheet Quattro Pro WR1 Spreatsheet Symphony 1.1 - 1.2 - 2 WRD Template Charisma WRI Write editor format Write - WinWord WRK Spreadsheet Symphony 1.0 WRL VRML file WRP Archive Amiga WARP WRS Windows Resource eg. might indicate error if word cannot open WordPerfect for Win WS APL Worksheet WS Text file WordStar 5.0-6.0 WS2 Text file WordStar 2000 WSD Document WordStar WSP Workspace Fortran PowerStation WSQ Wavelet-packet Scalar Quantization Format WSRC X-wais source WST Text file WordStar WTR Working Timetable rules file Simsig WTT Working Timetable timings file Simsig WTF World of Warcraft Data File World of Warcraft WTF WinTaper Data WWB Button bar for document window WordPerfect for Win WWK Keyboard layout WordPerfect for Win WXH Program/Script File WaxHtml Web Programming Language WXP Document EXP for Windows [edit] X Ext. Description Used by X Archive X1.EXE X ; AVS X image file SDSC Image Tool X DirectX 3D object X LEX source code file X XBasic Source code file Xbasic X3D x3d and xdart Formats XA XA audio file used in SimCity 3000 by Maxis, also by Sony Playstation XAR Xara file Project document used by vector graphics editor Xara Xtreme, previously known as Xara Studio. Early versions used the extension 'ART'. XBE Xbox Executable Xbox XBM X11 Bitmap graphics file XCF Gimp image file The Gimp XCK Extended crack file (usually text) XCL Xtree for Windows Script file Xtree for Win XDF OS/2 extended disk format image XDFCOPY.EXE XDM Directory Manipulator for 32-bit Protected Mode Xenotech Research Labs XE Xenon - for Associative 3D Modeling Ashlar-Vellum XEX Xbox 360 Executable File XFN Printer font Xerox 4045 - Ventura Publisher XFR Ventura Publisher Bitmap Editor Font file XFT 24 pin printer font ChiWriter XI Fast Tracker 2 instrument file AWAVE XI Fastracker 2.0 Instrument File Fastracker 2.0 XIF Xerox Image Format Pagis Pro 2.0 and 3.0 XLA Add-in macro sheet Microsoft Excel XLA XLib Archive xlibpas2.zip XLB Microsoft Excel Toolbar Microsoft Excel XLC Microsoft Excel Chart Microsoft Excel XLD Microsoft Excel Dialog Microsoft Excel XLK Microsoft Excel Archive Microsoft Excel XLL Microsoft Excel Dynamic Link Library Microsoft Excel XLM Microsoft Excel Macro File Microsoft Excel XLS Microsoft Excel Spreadsheet Microsoft Excel XLSB Microsoft Excel 2007 Binary Workbook (BIFF12)(Spreadsheets) Microsoft Excel 2007 (see Microsoft Office 2007 file extensions) XLSX Office Open XML Workbook (Spreadsheets) Microsoft Excel 2007 (see Microsoft Office 2007 file extensions) XLT Microsoft Excel Template Microsoft Excel XLT Translation table Lotus 1-2-3 - Symphony - Procomm Plus XLV Microsoft Excel Module Microsoft Excel XLW Microsoft Excel Workbook Microsoft Excel XM Fast Tracker 2 extended module AWAVE, Mod4Win, FastTracker, ImpulseTracker XM Music format FastTracker - Cubic Player XMOD Monarch Model Monarch Professional XMI Compressed eXtended MIdi music XML eXtensible Markup Language file XMF eXtensible Music Format XMPZ XML Miradi Project Zipfile Miradi XMV video Xbox XNF Standard Network File form Xnn Secondary indexes Borland Paradox XOF RenderMorphics XP eXtended Pattern FastTracker 2.0 XPM X11 Pixel Map graphics file XQT Executable file Waffle XQT Macro sheet SuperCalc XRF Cross-reference file XSF data Microsoft InfoPath file XSPF XML Sharable Playlist Format XTB External translation table LocoScript XTP XTreeGold overlay XTreeGold XVF Xyngo Video File Xyngo Video Board XWD X Window System window dump image graphics file SDSC Image Tool XWK Keyboard mapping Crosstalk XWP Session Crosstalk XWP Text file Xerox Writer XX Encoded file (ASCII) XXENCODE XXE Encoded file (ASCII) XXENCODE XY Text file XY Write XY3 Text file XYWrite III XYW Text file XyWrite III XYZ Molecular coordinates XMol, RasMol [edit] Y Ext. Description Used by Y Archive (Amiga) Yabba Y YACC grammar file Yacc/Bison YAL Data custom/nature.yal Arts & Letters YC Archive YACC (YAC.EXE) Ynn Secondary index Borland Paradox YMP Yast Meta Package YAST2 (SUSE Linux Package Manager) YST Data YASRT Raytracer scene YRD Yard Tracks File FYM YUV Graphics format (YUV) YY Bison grammar file Bison YZ Archive YAC [edit] Z Ext. Description Used by Z Archive WinZipNT - COMPRESS - PACK Z01-Z99 Split WinRAR Archive Z3 Infocom game module Z3D Zmodeler-file Zmodeler 1 & 2 Z64 Nintendo 64 ROM Project64 Nintendo 64 emulator Z80 Snapshot ZX Spectrum emulator by g.a.lunter ZAD ZFax digitized voice file ZFax ZDG Compressed ZiffNet text document Zview ZED BitTorrent Link Podmailing ZER Data file ZIP Archive PKZip - WinZip - Mac OS X