C. FILE EXTENSIONS START WITH LETTER 'C' - WINDOWS FILE EXTENSIONS STARTING WITH LETTER 'C'

C

Ext. Description Used by
C-- C—language source Sphinx C--
C C language source
Watcom C/C++, Borland C/C++, gcc and other C compilers
Note that on case sensitive platforms like Unix and with the gcc compiler the uppercase .C extension indicates a C++ source file.
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

CATDrawing Drawing file of CATIA V5 CATIA V5
CATPart Part file of CATIA V5 CATIA V5
CATProduct Assembly file of CATIA V5 CATIA V5
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 Company Data File Nominal Small Business Accounting software

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
CFA Audio file Adobe Premiere Pro
CFC ColdFusion Component
Adobe ColdFusion
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
CHML Encrypted Data File Krasbit Technologies, Chameleon Imaging Workflow Software
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
CLJ Clojure source code
Clojure

CLP Clip art graphics file Quattro Pro

CLP Clipboard file Windows 3.x
CLP Compiler response file CA Clipper
CLP Graphics format PCPAINT/Pictor
CLPI ClipAV Clip Information file for Blu-ray Media hardware / software with Blu-ray structure support
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
CRDOWNLOAD Google Chrome download in progress Google Chrome
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#

CSD Compact Shared Document Dream To Reality

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++