| cce | Cumulus 6 Category Export Data |
| ccf | CommView Captured Data |
| ccf | Cryptload Container Format File |
| ccf | Cumulus Catalog Data |
| cch | .NET Security Cache |
| cch | PhotoModeler Photo Chip Data |
| ccj | Compiled Crossword Applet |
| ccj | Corticon Server Rulesets Data |
| cck | COMcheck Data |
| ccl | CCTools Levelset Data |
| ccl | CFX CCL File |
| ccld | Construction Clouds Data |
| ccm | Lotus CC:Mail |
| ccm | Multimedia Fusion Custom Menu Data |
| ccmg | STAR-CD v4 Solver Ready Geometry Data |
| ccmp | STAR-CD v4 Results Data |
| ccmt | STAR-CD v4 Transient Data |
| ccp4 | Collaborative Computational Project Number 4 Format Data |
| ccr | ASTM Continuity of Care Record |
| ccr | Microsoft SMS Client Configuration Request Data |
| ccrf | Saba Centra Recording Studio Recording |
| ccrz | Saba Centra Recording Studio Recording |
| ccs | TrialDirector Clip Script |
| cct | DesignWorks Schematic Data |
| cct | MicroSim PCBoard Design Information |
| ccu | CryptLoad Update Data |
| ccv | SAP Business Objects Crystal Vision Report |
| ccw | Crossword Compiler Crossword File |
| ccwsln | Connected Components Workbench Data |
| ccz | Client-Course Manager Customized Report Distribution Data |
