| calcrc | Calc Runtime Configuration |
| caos | CanOpener Preference |
| cav | CAView Configuration |
| cboard | Final Cut Pro Color Board Preset |
| cbq | StarOS Class Based Queuing Script |
| ccf | Lotus Symphony Communications Configuration |
| ccfg | BartPE Configuration |
| cdadj | Cyberlink ColorDirector Presets |
| ceid | FreeAgent DockStar Configuration |
| cf | Configuration File |
| cf | Sendmail M4 Configuration File |
| cfg | Configuration File |
| cfg | RMCProfile Configuration Data |
| cfgv | MC Command Center Settings Data |
| cfi | Xilinx iMPACT Configuration |
| cfp | Symantec Client Firewall Policy Data |
| cfpreset | Color Finesse for Adobe After Effects Preset |
| cfu | Symantec Client Firewall Update Policy Data |
| cgsyn | Code-Genie Syntax Definition Data |
| cgv | OSLay Parameters Data |
| cha | mIRC Chat Settings |
| chat | mIRC Chat Settings |
| chl | WinFast PVR Channel List |
| cis | CheckInbox Settings |
| cli | QIP Contact List Invisible Data |
| clk | WatchGuard System Manager Cloaked Data |
| clms | Clipboard Master Settings Data |
| clr | Autodesk 3D Studio MAX Color Definitions |
| clr | WinBatch Studio Syntax Color Customization |
| clv | QIP Contact List Visible Data |
