| cpm | Cisco Secure Policy Manager Settings |
| cq | CQUAL Configuration |
| cron | Unraid OS Cron Data |
| crop | Crick Software Clicker Options |
| crp | CureROM Profile |
| cs-cnf | Currency Server Software Configuration |
| cscfg | Microsoft Azure Service Configuration Schema |
| cscnp | Colasoft Capsa Current Node Group List |
| csd | Casio WK-3000 User Scale Memory |
| csf | Adobe InDesign Color Settings |
| cshrc | C Shell Startup Configuration File |
| csl | CineStyle Color Lookup Settings |
| cst | Logic Pro Strip Settings Data |
| ctb | BRLTTY Contraction Table Data |
| ctf | AVG Update Control File |
| cti | BRLTTY Contraction Table Include Data |
| cui | Autodesk AutoCAD Custom Workspace |
| cwc | CADfix Wizard Configuration Data |
| cwl | TeXstudio Completion Word List |
| cwy | ChordWizard Songtrix Style |
| cw_ | CorelDraw Workspace Description Data |
| cxr | CX-Programmer Settings Data |
| cxz | PND Scanner Configuration |
| cyberduckprofile | Cyberduck Connection Profile Data |
| d2r | DEM2RWX Saved Settings |
| dapf | Dinkey Pro/FD DinkeyAdd Parameter Data |
| db | CA-dBFast Database Configuration |
| db7 | Casio WK-3000 User Drawbar Organ Tone |
| dbgdt | IAR Embedded Workbench Debugger Settings |
| dbh | CodeWarrior Debug Preferences |
| dbl | DAZ Brick Light |
| dc0 | OpenBSD Interface Configuration Data |
| dc1 | OpenBSD Interface Configuration Data |
| dcc | Nokia Dynamic Camera Configuration |
| dcf | Arbortext Editor Document Type Configuration Data |
