| conf | Configuration File |
| config | Configuration File |
| copreset | Capture One Preset Data |
| cos | Capture One Settings |
| cpf | Curtis Programmer Settings |
| cpff | Cam2Com Capture Properties |
| cpm | Cisco Secure Policy Manager Settings |
| cq | CQUAL Configuration |
| crop | Crick Software Clicker Options |
| crp | CureROM Profile |
| 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 |
| ctf | AVG Update Control File |
| cui | Autodesk AutoCAD Custom Workspace |
| cwc | CADfix Wizard Configuration Data |
| cwl | TeXstudio Completion Word List |
| cwy | ChordWizard Songtrix Style |
| cw_ | CorelDraw Workspace Description Data |
| cxz | PND Scanner Configuration |
| d2r | DEM2RWX Saved Settings |
| dapf | DinkeyAdd Parameter Data |
| db7 | Casio WK-3000 User Drawbar Organ Tones |
| dbgdt | IAR Embedded Workbench Debugger Settings |
| dbh | CodeWarrior Debug Preferences |
| dbl | DAZ Brick Light |
| dcc | Nokia Dynamic Camera Configuration |
| dcls | Catia V4 Settings |
| dcst | Adobe InDesign Document Settings |
| def | Binary Editor Definition Data |
| deft | Juice Grinder Defaults |
| deny | TCP Wrapper Access List Data |