| cos | Scilab Xcos Diagram Data |
| cosessiondb | Capture One Session Database |
| cosf | Scilab Xcos Diagram Data |
| costyle | Capture One Style Data |
| cov | RFM Covariate Table |
| covsym | Gumshoe Coverage Symbols Data |
| cow | Cowsay Data |
| cox | BibExcel COX Data |
| coz | EFILive Calibration Data |
| co_ | Compressed COM File |
| cp1 | CARE-S InfoWorks Phosphorus Detail Data |
| cp4 | Adobe Captivate 4.0 Simulation Data |
| cpa | Cadstar PCB Design |
| cpa | Colasoft Capsa Data |
| cpaa | Adobe Captivate Shared Action Data |
| cpao | 3Dize Cool Page Objects Counter Data |
| cpd | Adobe RoboHelp Cache Project Database |
| cpd | SmartWare Compiled Printer Descriptor |
| cpf | CaseMap Portable Format Data |
| cpf | CircuitCAM Manufacturing Process Definition Data |
| cpg | 3Dize Cool Page Tutorials Data |
| cpg | CATS PG File |
| cpg | Manga Studio Page Data |
| cpglog | Motorola Codeplug Session Log |
| cpi | Lifo-Pro Consumer Price Index |
| cpi | MS-DOS Code Page Information |
| cpixml | iTWO Construction Process Integration XML |
| cpl | Tekla Structures Contour Plate Properties |
| cpl | TINA Complex Parameter List |
| cpl | TrialDirector Concordance Data |
| cpq | Exam Essentials Exam Data |
| cpr | Adobe Captivate Preferences Data |
| cpr | Cubase Project |
| cprr | Adobe Captivate XML Recording Script |
| cps | Adobe Captivate Styles Data |
