| c64 | PC64 Saved Session |
| c8k | CHIP-8 Keyboard Data |
| ca | CLAN Conversation Analysis Data |
| ca | DATAIR FlexPlus Data |
| ca | Initial Telnet Cache |
| ca | OpenSSL Certificate Authority Data |
| ca1 | STABCAL Calculation Data |
| ca2 | STABCAL Calculation Data |
| ca3 | Casio WK-1800 Save All Data |
| ca3 | STABCAL Calculation Data |
| ca4 | STABCAL Calculation Data |
| ca5 | STABCAL Calculation Data |
| ca6 | STABCAL Calculation Data |
| ca7 | STABCAL Calculation Data |
| cabal | Haskell Cabal Data |
| caccrt | CACAO Cartesian Chemical Modeller Data |
| cache-2 | VLC Media Player Font Cache |
| cache-3 | VLC Media Player Font Cache |
| cache2 | Pro/ENGINEER Cached Data |
| cachedmsg | Valve Steam Cache Data |
| cachedump | Cachedump Data |
| cadpac | CADPAC Chemical Modeller Input Data |
| cae | Abaqus/CAE Model Database |
| caf | Cal3D Binary Animation |
| cag | CADfix ASCII Geometry Data |
| cag | Capella Gallery Data |
| cag | Microsoft ClipArt Gallery Database |
| cah | Ulead Photo Explorer Thumbnail Cache |
| cal | Autodesk 3D Studio Max Pose Adjustment Data |
| cal | HTML Calendar Maker Pro Calendar Data |
| cal | Keysight PLTS Calibration Data |
| cal | Lego Mindstorms NXT Sensor Calibration Data |
| cal | Radiance Function File |
| cal | SuperCalc WorkSheet |
| cal | SWAT Auto-calibration Data |
