| Extension |
Meaning / Link |
| .C |
C Program File |
| .C00 |
Ventura
Print File |
| .C01 |
Typhoon Wave File |
| .C86 |
C86 C Program |
| .C-- |
Sphinx C-- Source
code |
| .CA |
Telnet Server
Initial Cache Data File |
| .CA7 |
Beta 44 Job File |
| .CAB |
Cabinet File
(Microsoft installation archive) |
| .CAC |
dBase
IV Executable File |
| .CAD |
Softdesk Drafix CAD
File |
| .CAG |
MS Clip Gallery
Catalog File |
| .CAL |
SuperCalc Worksheet,
Calendar File, CALS compressed bitmap |
| .CAM |
Casio Camera Graphic |
| .CAN |
Navigator Fax |
| .CAP |
Ventura
Caption, Telix Session Capture, Compressed Music File |
| .CAR |
AtHome Assistant
File |
| .CAS |
Comma-delimited
ASCII File |
| .CAT |
dBase
Catalog, Quicken IntelliCharge Categorization File |
| .CB |
MS Clean Boot File |
| .CBC |
CubiCalc Fuzzy Logic
System File |
| .CBI |
IBM Mainframe Column
Binary Formatted File |
| .CBL |
COBOL Program |
| .CBM |
XLib Compiled Bitmap |
| .CBT |
Computer
Based Training |
| .CC |
C++ Program File, Visual
dBASE Custom Class File |
| .CCA |
CC:Mail File |
| .CCB |
Visual Basic
Animated Button Configuration |
| .CCC |
Chat, Curtain Call
Native Bitmap Graphic |
| .CCE |
Calendar Creator
Plus Data File |
| .CCF |
OS/2
Multimedia Viewer Configuration File, Symphony
Communications Configuration File |
| .CCH |
Corel
Chart |
| .CCL |
Intalk Communication
Command Language |
| .CCM |
Lotus
CC:Mail Mailbox |
| .CCO |
CyberChat Data File |
| .CCR |
Chat Room Shortcut |
| .CCT |
Macromedia
Director Shockwave Cast |
| .CDA |
CD Audio Track |
| .CDB |
Turbo C Database,
Clipboard File, CardScan Database, PowerDesigner Conceptual
Model Backup File |
| .CDC |
Chromeleon Driver
Configuration Plugin |
| .CDD |
Chromeleon Device
Driver |
| .CDF |
Comma Delimited
Format, Cyberspace Description Format, MS
Channel Definition Format |
| .CDI |
Phillips Compact
Disk Interactive Format |
| .CDK |
Atari Calamus
Document |
| .CDM |
PowerDesigner
Conceptual Model File, Visual
dBASE Custom Data Module |
| .CDR |
Corel
Vector Graphic, Raw Audio-CD Data |
| .CDT |
Corel
Draw Template |
| .CDX |
Compound Index, Corel
Draw Compressed Drawing, MS
Visual Foxpro Index, Active Server Document |
| .CE |
FarSide Computer
Calendar File |
| .CEG |
Continuous Edge
Graphic, Tempra Show Bitmap Graphic |
| .CEL |
Autodesk
Animator Graphic, CIMFast Event Language File, Kiss
Paper Doll File |
| .CER |
Certificate File
|
| .CEX |
The Currency
Exchanger Rate File |
| .CF |
Imake Configurtion
File |
| .CFB |
Comptons Multimedia
File |
| .CFG |
Configuration
(various) |
| .CFL |
Corel
Flowchart File |
| .CFM |
Corel
FontMaster, Cold Fusion Template File, Visual
dBASE Windows Customer Form |
| .CFN |
Atari Calamus Font
Data File |
| .CFO |
TCU Turbo C
Utilities C Form Object |
| .CFP |
Complete Fax
Portable Fax File |
| .CGA |
Ventura
CGA Screen Characters |
| .CGI |
Common Gateway
Interface Script |
| .CGM |
Computer Graphics
Metafile |
| .CH |
Clipper Header, OS/2
Configuration File |
| .CH3 |
Harvard
Chart |
| .CH4 |
Charisma 4.0
Presentation |
| .CHA |
Adobe
Pagemaker Kerning Data |
| .CHD |
FontChameleon Font
Descriptor |
| .CHF |
pcAnywhere
Remote Control File |
| .CHI |
Chiwriter Document |
| .CHJ |
Help Composer
Project |
| .CHK |
CHKDSK/SCANDISK
Output, WordPerfect Temp File |
| .CHL |
Chromeleon Channel
Raw Data, Configuration History Log |
| .CHM |
Compiled HTML Help |
| .CHN |
Ethnograph Data File |
| .CHP |
Ventura
Publisher Chapter |
| .CHR |
Character or Font
File |
| .CHT |
Cheat
Machine Data File, ChartViewer dBase Interface File, Harvard
Graphics Vector File |
| .CIF |
Ventura
Chapter Information, Easy
CD Creator Image, pcAnywhere
Caller File, Ventura
Converted Image File, Colombo
Ipermedia File |
| .CIL |
Clip Gallery
Download Package |
| .CIM |
Sim City 200 File |
| .CIN |
OS/2
Change Control File |
| .CIR |
SuperMax E-CAD
Save-File Command |
| .CIT |
Intergraph Scanned
Image |
| .CIX |
TCU Turbo C
Utilities Database Index |
| .CK1 |
iD/Apogee
Commander Keen 1 Data File (.CK1 to .CK6) |
| .CKB |
Borland
C++ Keyboard Mapping File |
| .CKP |
Ingres
Checkpoint File |
| .CL |
Generic LISP Source
Code |
| .CL3 |
Easy
CD Creator Layout File |
| .CL4 |
Easy
CD Creator Layout File |
| .CLA |
Java Class File
(usually .CLASS but can be shortened) |
| .CLG |
Disk Catalog
Database |
| .CLL |
Crick Software
Clicker File |
| .CLO |
Cloe Image |
| .CLP |
Windows
Clipboard/Picture, Quattro Pro Clip
Art, Clipper 5 Compiler Script |
| .CLR |
WinEdit Colorization
Word List, 1st Reader Binary Color Screen Image, PhotStyler
Color Defintion |
| .CLS |
Visual Basic Class
Module, C++ Class Definition |
| .CM |
Craftman Data File |
| .CMA |
Applix
TM1 Database File (text) |
| .CMB |
Chromeleon Backup
Archive |
| .CMD |
OS/2,
WinNT Command File, OS CP/M Command File, dBase
II Program File, 1st Reader External Command Menu |
| .CMF |
Creative Music File,
Corel Metafile |
| .CMG |
Chessmaster Saved
Game |
| .CMK |
Card Shop Plus File |
| .CML |
Cheat
Machine Library File (Windows), PADGen
Company Info File |
| .CMM |
CEnvi
(ScriptEase:Desktop) Batch File |
| .CMP |
Leadview Bitmap,
Open Access File, Address Document, JPEG Bitmap, CorelDRAW
Postscript Printer Header, Route 66 Address Document, MS
Word for DOS User Dictionary |
| .CMR |
MediaPlayer Movie |
| .CMU |
Carnegie Mellon
University Stereo Raster Image |
| .CMV |
Corel
Move Animation |
| .CMX |
Corel
PhotoPaint Image, Corel
Presentation Exchange Image, Apple Viewer File |
| .CNF |
Configuration
(various), SpeedDial |
| .CNM |
Windows Application
Menu Options and Setup File |
| .CNQ |
Compuworks Design
Shop File |
| .CNT |
Help File Contents
(and other contents) |
| .CNV |
MS
Word Data Conversion File, WS_FTP Pro Upload Conversion File
Data, WordPerfect Temporary File |
| .COB |
COBOL Program File, Caligari
Truespace Format, TrueSpace2
Object |
| .COD |
Code List, Compiler
Program Code, Multiplan Data File, dBase
Template Source File, FORTRAN Compiled Code |
| .COL |
Autodesk
Color Palette, Multiplan Spreadsheet, Lotus
Notes Import Column Description File |
| .COM |
Command (Executable
file) |
| .CON |
Knowledgeware
Consolidation File, Simdir Configuration File |
| .CP8 |
CP8 256 Gray Scale
Image |
| .CPD |
Fax Coversheet, Corel
PrintOffice File, Complaints Desk Script |
| .CPE |
Fax Coversheet |
| .CPF |
Complete Fax File |
| .CPH |
Corel
Print House Image |
| .CPI |
Code Page
Information, ColorLab Image |
| .CPJ |
CeQuadrant CD
Project |
| .CPL |
Control Panel
Extension, Corel Color Palette,
Compel Presentation |
| .CPO |
Corel
Print House File |
| .CPP |
C++ Program,
CA-Cricket Presents Presentation |
| .CPR |
Corel
Presents Presentation, Knowledge Access Graphics |
| .CPS |
Antivirus Checksum
File, Central Point PC Tools Backup, Colored PostScript
File |
| .CPT |
Macintosh Compressed
File, Corel Photo-Paint Image,
dBase Encrypted Memo, CA
Cricket Presents Template |
| .CPX |
Control Panel
Applet, CryptaPix Encrypted Image, Corel
Presentation Exchange Compressed Drawing |
| .CPY |
Copy Books Data File |
| .CPZ |
COMPOZ Music Text |
| .CRD |
Cardfile (Windows
3.x Database) |
| .CRF |
Zortech C++
Cross-Reference File |
| .CRH |
MS
Golf Image File |
| .CRL |
Certificate
Revocation List |
| .CRP |
dBase
Encrypted Database, Visual
dBASE Custom Report, Corel
Presents Run-Time Presentation |
| .CRS |
WordPerfect
5.1 for Windows File Conversion Resource |
| .CRT |
Certificate File, Oracle
Terminal Settings Info, UNIX Crontab File |
| .CRU |
CRUSH Compressed
Archive |
| .CRY |
Crypto Chat II
Encrypted Notebook-content |
| .CSA |
Comma Deliminated
Text |
| .CSC |
Corel
Script |
| .CSD |
Bitstream
Fontware File, Chemsoft® MSDS Database File |
| .CSH |
Hamilton Labs C
Shell Script File |
| .CSI |
Cyberautograph
Signed Item |
| .CSK |
Claris
Works |
| .CSM |
Borland
C++ Symbol File, Borland
C++ 4.5 Precompiled Header, Kodak DC265 Camera Script |
| .CSP |
PC Emcee On-Screen
Image |
| .CSQ |
Foxpro
Queries |
| .CSS |
Hypertext Cascading
Style Sheet, Stats+ Datafile, Statistica Datasheet |
| .CST |
Macromedia
Director Cast File |
| .CSV |
Comma-Separated
Variables, CompuShow
Adjusted EGA/VGA Palette |
| .CT |
Scitex CT Bitmap |
| .CTF |
TIFF Compressed
File, Symphony Character Code Translation |
| .CTL |
Setup Information
(various), User Control (various) |
| .CTX |
Compressed Text,
Visual Basic User Control Binary File, Pretty Good Privacy
(PGP), Ciphertext File, MS Online Course Text |
| .CTY |
SimCity City File |
| .CUE |
MS Cue Cards Data |
| .CUF |
Turbo C Utilities
Form Definition |
| .CUL |
IconForge/ImageForge
Cursor Library |
| .CUR |
Cursor |
| .CUT |
Dr. Halo Bitmap
Graphic |
| .CV |
Corel
Versions Archive, MS CodeView Information |
| .CV4 |
Codeview Colors |
| .CVP |
WinFax
Cover Page |
| .CVS |
Canvas Drawing File |
| .CVT |
dBase
Converted Database |
| .CVW |
Codeview Colors |
| .CWE |
Crossword
Express |
| .CWK |
Claris
Works Data |
| .CWS |
Claris
Works Template |
| .CXT |
Macromedia
Director Protected Cast File |
| .CXX |
Zortech C++ Program |
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