| contact | Windows Vista Contacts Data |
| contacts | Windows Vista Contacts Data |
| contree | IQ-TREE Consensus Tree Data |
| control | HEC-HMS Control Specifications Data |
| coo | Autodesk AutoCAD Bounding Coordinates Cookie |
| Tajima Embroidery Data File |
| cook | Netscape for Mac Cookie Data |
| cookie | HTTP Cookie Data |
| cool | QB - Text Analyzer Vocabulary Data |
| coords | Ribbons Coords Data |
| cor | CYANA DG Cartesian Coordinate File |
| Insight II Output Coordinate Data |
| cor1 | Corel Multimedia Manager Data |
| corelshow | Corel MediaOne SlideShow |
| correction | AsUType Correction Data |
| 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 |
| Colasoft Capsa Data |
| cpaa | Adobe Captivate Shared Action Data |
| cpao | 3Dize Cool Page Objects Counter Data |
| cpd | Adobe RoboHelp Cache Project Database |
| SmartWare Compiled Printer Descriptor |
| cpe | Faro SCENE Point Cloud Data |
| cpf | CaseMap Portable Format Data |
| CircuitCAM Manufacturing Process Definition Data |
| iGO 3D Building Database |
| cpg | 3Dize Cool Page Tutorials Data |
| CATS PG File |
| Manga Studio Page Data |
| cpglog | Motorola Codeplug Session Log |
| cpi | Lifo-Pro Consumer Price Index |
| MS-DOS Code Page Information |
| cpixml | iTWO Construction Process Integration XML |
| cpl | CorelDraw Color Palette |
| Tekla Structures Contour Plate Properties |
| TINA Complex Parameter List |
| TrialDirector Concordance Data |
| cpn | CPN Tools CPN Model |
| cpq | Exam Essentials Exam Data |
| cpr | Adobe Captivate Preferences Data |
| Cubase Project |
| cprr | Adobe Captivate XML Recording Script |
| cps | Adobe Captivate Styles Data |
| Classroom Performance System Data |
| QEMM Backup Data |
| cpt | Casio WK-1800 Pattern Sequerncer Pattern |
| Ccrypt Encrypted File |
| dBASE Encrypted Memo Data |
| Mail.dat Component File |
| cpt2 | M-Tron Pro Library |
| cptl | Adobe Captivate 5 Template |
| cptm | Adobe Captivate Theme Data |
| cpu | SiSoftware Sandra File |
| cpuprofile | Google Chrome DevTools CPU Profile Data |
| cpv | Serena PVCS Logfile |
| cpw | GP-Pro EX Library |
| cpx | Character Set Translation Table |
| CorelDraw Exchange Compressed Drawing |
| cpxml | IBM ABLE Conversation Policies XML |
| cpy | Autodesk 3D Studio Max Copy Track Data |
| cp_ | Compressed CPL File |
| cq | CP/M SYSGEN Replacement Data |
| cqcn | Chimera Tool Data |
| cqe | Cumulus 6 Query Export Data |
| cqf | PCAnywhere Command Queue Data |
| cql | XDCC Catcher Queue List |
| cqq | Cool Quiz Data |
| cqs | ConQuest Saved Search File |
| cqt | Mail.dat Container Quantity Data |
