| cur | Oasys T/HIS Curve File |
| current | WhatsApp Messenger Encrypted Database |
| cursorfx | CursorFX Theme |
| curv | Genetica Mathematical Curve |
| curve | ANSYS TurboGrid Curve File |
| curxptheme | CursorXP Theme |
| cus | Autodesk AutoCAD Custom Dictionary |
| cus | Medlin Payroll Software Customers Data |
| cus | Payroll Mate Customer Data |
| cus | WindLDR Custom Monitor Data |
| custom | Personal Paint Custom Language Data |
| cut | BPM Studio Cue Points Data |
| cut | BSL Cut Part of an Image |
| cut | CLAN Disambiguation Rules Data |
| cut | GMFC Foam Cutting Data |
| cuts | TS-Doctor Cuts Data |
| cuv | Origin Sample Curve Data |
| cuw | Toyota Calibration Update Wizard Data |
| cuz | CropWalker Data |
| cv2 | Adobe Audition CV2 Data |
| cva | ACDSee Canvas Sequence Set |
| cvd | Bitdefender Antivirus Database |
| cvd | ClamAV Virus Database |
| cvd | CVTracker Dictionary Data |
| cvdsym | Canvas X Draw Symbol Data |
| cvf | CPU-Z Validation |
| cvj | Cabinet Vision Solid Job |
| cvj | Corticon Vocabulary Data |
| cvl | ARGUS Valuation-Capitalisation Export File |
| cvn | CineVision Encoding Session Data |
