A ABK AMOS Basic data file ABK Corel Draw AutoBackup ACL Corel Draw 6 keyboard accelerator ACM Used by Windows in the system directory ACP Microsoft Office Assistant Preview file ACT Microsoft Office Assistant Actor file ACV OS/2 drivers that compress and decompress audio data AD After Dark screensaver ADB Appointment database used by HP 100LX organizer ADD OS/2 adapter drivers used in the boot process ADM After Dark MultiModule screensaver ADP Used by FaxWorks to do setup for fax modem interaction ADR After Dark Randomizer screensaver AFM Adobe font metrics AF2 ABC Flowchart file AF3 ABC Flowchart file AI Adobe Illustrator drawing AIF Apple Mac AIFF sound AIFC Similar to AIF AIFF Similar to AIF AIS ACDSee Image Sequence file ALB JASC Image Commander album ALL Arts & Letters Library AMOS AMOS Basic code AMS Velvert Studio music module (MOD) file ANC Canon Computer Pattern Maker file that is a selectable list of pattern colors ANI Animated Cursor ANS ANSI text API Application Program Interface file; used by Adobe Acrobat APR Lotus Approach 97 file APS Microsoft Visual C++ file ARC LH ARC (old version) compressed archive ARI Aristotle audio file ARJ Robert Jung ARJ compressed archive ART Xara Studio drawing ART Canon Crayola art file ASA Microsoft Visual InterDev file ASC ASCII text ASD WinWord AutoSave ASF Microsoft Advanced Streaming Format file ASM Assembler language source file ASP Active Server Page (an HTML file containing a Microsoft server-processed script) ASP Procomm Plus setup and connection script AST Claris Works "assistant" file ASX Cheyenne Backup script ASX Microsoft Advanced Streaming Redirector file ATT AT&T Group 4 bitmap AU UNIX sound file AVI Microsoft Video for Windows movie AWD FaxView document B BAK Backup file BAS BASIC code BAT Batch file BFC Windows 95 Briefcase document BG Backgammon for Windows game BI Binary file BIF GroupWise initialization file BIN Binary file BK and BK$ Sometimes used to denote backup versions BKS An IBM BookManager Read bookshelf BMK An A bookmark file BMP Windows or OS/2 bitmap BM1 Apogee BioMenace data file BOT LinkBot document BPX Lumena BigPix BRX A file for browsing an index of multimedia options BSP Quake map BS1 Apogee Blake Stone data file BS_ Microsoft Bookshelf Find Menu shell extension BTM Batch file used by Norton Utilities BUN CakeWalk Audio Bundle file (a MIDI program) BUP Backup file (rare) B4 Helix Nuts and Bolts file C C C code CAB Microsoft cabinet file (program files compressed for software distribution) CAL CALS Compressed Bitmap CAL Calendar schedule data CAS Comma-delimited ASCII file CAT IntelliCharge categorization file used by Quicken CB Microsoft clean boot file CCB Visual Basic Animated Button configuration CCF Multimedia Viewer configuration file used in OS/2 CCH Corel Chart CCM Lotus CC:Mail "box" (for example, INBOX.CCM) CCO CyberChat data file CCT Macromedia Director Shockwave cast CCX CorelDraw file CDA CD Audio Track CDF Microsoft Channel Definition Format file CDI Phillips Compact Disk Interactive format CDR Core Draw drawing CDT Corel Draw template CDX Corel Draw compressed drawing CEL CIMFast Event Language file CER Certificate file (MIME x-x509-ca-cert) CFB Comptons Multimedia file CFG Configuration file CGA CGA (Color Graphics Adapter) graphics data CGI Common Gateway Interface script file CGM Computer Graphics Metafile CH OS/2 configuration file CHA mIRC Chat file CHA Character data file in some games (example: Diablo) CHK File fragments saved by Windows Disk Defragmenter or ScanDisk CHM Compiled HTML file CHP Ventura Publisher chapter CHT ChartViewer file CHT Harvard Graphics vector file CIL Clip Gallery download package CIM Sim City 200 file CIN OS/2 change control file that tracks changes to an INI file CK1 iD/Apogee Commander Keen 1 data file CK2 iD/Apogee Commander Keen 2 data file CK3 iD/Apogee Commander Keen 3 data file CK4 iD/Apogee Commander Keen 4 data file CK5 iD/Apogee Commander Keen 5 data file CK6 iD/Apogee Commander Keen 6 data file CLASS Java class CLB Corel Library CLC Corel Catalog CLP Windows Clipboard file CLS Visual Basic Class Module CMD Command file for Windows NT (similar to a DOS .BAT file) CMD DOS CP/M command file CMD dBase-II program file CMF Corel Metafile CMP JPEG Bitmap CMP Address document CMV Corel Move animation CMX Corel Presentation Exchange image CNF Configuration file used by Telnet, Windows, and other applications with varying internal formats CNM Windows application menu options and setup file CNQ Compuworks Design Shop file CNT Windows (or other) system content files for the help index and other purposes COB Cobol code COB trueSpace2 object COD Microsoft C compiler output as displayable machine language/assembler with original C as comments COM Command file (program) CPD Fax Cover document CPE Fax Cover document CPI Microsoft MS-DOS code page information file CPL Control Panel extension CPL Corel colour palette CPP C++ code CPR Corel Presents Presentation CPT Corel Photo-Paint image CPX Corel Presentation Exchange Compressed drawing CRD Cardfile file CRP Corel Presents Run-Time Presentation CRT Certificate file CSC Corel Script CSP PC Emcee On-Screen image CSS Cascading Style Sheet file (MIME) CST Macromedia Director "Cast" (resource) file CSV Comma-separated values file CT Scitex CT Bitmap CT A graphic file associated with the Paint Shop Pro Graphic Editor CTL Used in general to mean a file containing control information. FAXWorks uses it to keep information about each fax sent and received. CTY SimCity's city CUE Microsoft Cue Cards data CUR Windows Cursor CUT Dr Halo bitmap CV Corel Versions archive CV Microsoft CodeView information screen CVP Kodak file CWK Claris Works data file CWS Claris Works template CXT Macromedia Director protected (not editable) "Cast" (resource) file CXX C++ source code file D DAT Data file DAT WordPerfect Merge Data DBF Ashton-Tate dBASE database DBX DataBeam image DCR Shockwave file DCS Desktop Color Separation file DCX Fax image (based on PCX) DDF BTRIEVE database DEF SmartWare II data file DEF C++ Definition DER Certificate file DIB Device-Independent Bitmap DIC Dictionary DIF Data Interchange Format spreadsheet DIR Macromedia Director file DIZ Description file DLG C++ Dialogue Script DLL Dynamic-Link Library DMF X-Trakker music module (MOD) file DOC Documentation file DOC FrameMaker or FrameBuilder document DOC WordStar document DOC WordPerfect document DOC Microsoft Word document DOT Microsoft Word document Template DPR Borland Delphi project header file DQY Microsoft Excel ODBC query file DRV Driver DRW Micrografx Designer/Draw DSG DooM saved game DSM Dynamic Studio music module (MOD) file DSP Microsoft Developer Studio project DSQ Corel QUERY file DSW Microsoft Developer Studio workspace DTF Symantec Q&A relational database data file DUN Microsoft Dial-up Networking Export file DV Digital video file (MIME) DWD DiamondWare digitized file DWG AutoCAD drawing, or older Generic CADD drawing format DXF Drawing Interchange (eXchange) format,a text representation of the binary DWG format DXR Macromedia Director protected (not editable) movie file E EGA EGA (Enhanced Graphics Adapter) graphics data EMF Enhanced Windows Metafile EML Microsoft Outlook Express mail message (MIME RFC 822) ENC Encore file EPS Encapsulated PostScript image ER1 ERWin file ERX ERWin file EVY Envoy document EWL Microsoft Encarta document EXC Microsoft Word Exclusion Dictionary EXE Executable file (program) F F FORTRAN file F77 FORTRAN file F90 FORTRAN file FAR Farandole Composer music module (MOD) file FAV Microsoft Outlook navigation bar FAX FAX Type image FCL Cyber Audio Library link file FDF Adobe Acrobat Forms Document file FH3 Aldus Freehand 3 drawing FIF Fractal image file FITS CCD camera image FLC AutoDesk FLIC animation FLI AutoDesk FLIC animation FLT Corel filter FLT StarTrekker music module (MOD) file FMB Oracle binary source code for form, version 4.0 and later FML File Mirror List (GetRight) FMT Oracle text format of form, version 4.0 and later FMT Microsoft Schedule+ print file FMX Oracle executable form, version 4.0 and later FND Microsoft Explorer Saved Search file (Find applet) FNG Font group file (Font Navigator) FOG Fontographer font FON System font FON ProComm Plus call report FOR FORTRAN file FOT Font-related file FP FileMaker Pro file FP1 Flying Pigs for Windows data file FP3 FileMaker Pro file FPX FlashPix bitmap FRM Form FRM FrameMaker or FrameBuilder document FRM Oracle executable form version 3.0 and earlier FRM Visual Basic form FRM WordPerfect Merge form FRX Visual Basic form stash file FTS Full-Text Search index file resulting from using Find in the Windows help system Can be erased; will be rebuilt when needed FW3 Framework III file FW4 Framework IV file GAL Corel Multimedia Manager album GCD Generic (TM) CADD drawing (later versions) GCP Ground Control Point file used in image processing of remote sensing data often to form map projections. CHIPS (CopenHagen Image Processing System) uses these files. GED Graphic Environment Document (drawing) GEM GEM metafile GEM Ventura/GEM drawing GEN Ventura-Generated text file GetRight GetRight Unfinished-Download file GFC Patton&Patton Flowcharting 4 flowchart file GFI Genigraphics Graphics Link presentation GFX Genigraphics Graphics Link presentation GID Windows 95 global index file (containing help status) GIF CompuServe bitmap GIM Genigraphics Graphics Link presentation GIX Genigraphics Graphics Link presentation GKS Gravis GripKey document GNA Genigraphics Graphics Link presentation GNX Genigraphics Graphics Link presentation