| Abbreviation | Definition |
|---|---|
| CFP | Complete Fax Portable Fax file |
| CFR | Code of Federal Regulations guidance (NRC Inspection Manual) |
| CFS | Inmos configuration file |
| CFT | Disney Animation Studio CFast graphics file |
| CFW | Chart For Windows |
| CGA | CGA display font |
| CGI | Common Gateway Interface script |
| CGL | Error log (CodeGuard) |
| CGM | Computer Graphics Metafile - Vector graphics format |
| CGR | CATIA Generated Results |
| CH | CA Clipper Header file |
| CH | OS/2 Configuration file |
| CH3 | Harvard Graphics 3.0 Chart |
| CH4 | Charisma 4.0 Presentation |
| CHA | Chat (IRC data) |
| CHAT | Chat (IRC data) |
| CHD | FontChameleon Font descriptor |
| CHI | ChiWriter Document |
| CHK | Recovered data (ChkDsk, ScanDisk) |
| CHK | Temporary file (WordPerfect for Win) |