| Abbreviation | Definition |
|---|---|
| COD | Template source file (dBASE Application Generator) |
| COD | UUPC CODe definition table |
| COD | Videotext file |
| COL | Microsoft Multiplan Spreadsheet Programming file extension |
| COM | COMpressed Unix file archive (COMpact) |
| COM | DOS Command file (memory image of executable program) |
| CON | Simdir Configuration file |
| CONF | Unix Configuration information |
| COO | Cookie file |
| CORE | Bitmap graphics (Core Software Tech CORE IDC file) |
| CORE | Core Software Tech CORE IDC Bitmap graphics file |
| CPC | Cartesian Perceptual Compression Compressed image |
| CPD | Complaints Desk Script file |
| CPD | Fax Cover document |
| CPE | Fax Cover document |
| CPF | The Complete Fax - Fax file |
| CPI | Bitmap graphics (Colorlab Processed Image) |
| CPI | Code Page Information file (DOS) |
| CPJ | CeQuadrat CD ProJect file |
| CPL | Collection Programming Language |