| Abbreviation | Definition |
|---|---|
| CSM | Borland C++ 4.5 Precompiled header |
| CSO | Compressed ISO file |
| CSP | PC Emcee Screen Image |
| CSS | Cascade Style Sheet |
| CSS | Cascading Style Sheet |
| CSS | Datafile (CSS - Stats+ - Statistica) |
| CSV | CompuShow Adjusted EGA/VGA palette |
| CSV | Data file (Comma Separated Values format) |
| CSY | Polymorphic DLL (EPOC) |
| CT | Iris CT format 32bit Bitmap graphics |
| CT | Scitex CT Bitmap 32bit CMYK Bitmap graphics (Scitex scanners) |
| CTC | Croc Termination Conditions |
| CTC | PC Installer Control file |
| CTF | Symphony Character code Translation File |
| CTL | Control file (dBASE IV - Aldus Setup) |
| CTS | Permanent location contents (ABC programming language) |
| CTX | Ciphertext file (PGP) |
| CTX | Course TeXt file (Microsoft online guides) |
| CUBE | Bitmap graphics (Cubicomp/Vertigo image file) (Cubicomp PictureMaker) |
| CUBI | Bitmap graphics (Cubicomp/Vertigo image file) (Cubicomp PictureMaker) |