| cvl | ARGUS Valuation-Capitalisation Export File |
| cvn | CineVision Encoding Session Data |
| cvr | ElectraSoft Fax Cover Page |
| cvt | Convert Data |
| cvt | CVTracker Template |
| cvt | dBase IV Converted Database Backup |
| cvt | Follett Patron Conversion Utility Data |
| cvz | Card Vault Inventory Data |
| cw5 | CodeWallet Pro 5 Wallet |
| cw6 | COMPRESS Vessel Model File |
| cwa | Castelware Inventory Audit Data |
| cwdb | ClarisWorks Database |
| cwie | CodeWarrior Module Data |
| cwks | ClarisWorks Data |
| cwl | ClarisWorks Library Data |
| cwm | Common Warehouse Metamodel File |
| cwpb | CopyWrite Project Binder Data |
| cwr | WrapCandy Template |
| cww | Crossword Weaver Puzzle |
| cwx | CodeWallet Pro 5 Form |
| cx5 | Clone Manager XML Data |
| cxa | ANSYS Fluent Solution Animation File |
| cxa | FMAT Listmode Data |
| cxb | Custody X Change CXB Data |
| cxc | Custody X Change Data |
| cxd | Hamamatsu SimplePCI Data |
| cxe | Common XML Envelope Data |
| cxf | Coordinates Export Format |
| cxf | Google Picasa Collage |
| cxf | SciFinder Chemical eXchange Format Data |
