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)

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

CFB Comptons Multimedia file

CFG Configuration file

CGI Common Gateway Interface script file

CGM Computer Graphics Metafile

CH OS/2 configuration file

CHK File fragments saved by Windows Disk Defragmenter or ScanDisk

CHP Ventura Publisher chapter

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

CLP Windows Clipboard file

CLS Visual Basic Class Module

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

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 trueSpace2 object

COD Microsoft C compiler output as displayable 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

CSV Comma-separated values file

CT Scitex CT Bitmap

CTL Used in general to mean a file containing control information.

CUE Microsoft Cue Cards data

CUR Windows Cursor

CUT Dr Halo bitmap

CV Corel Versions archive

CV Microsoft CodeView information screen

CWK Claris Works data file

CWS Claris Works template

CXX C++ source code file