| 3ox | 3Shape Order Exchange Format Data |
| 3oxz | 3Shape Order Exchange Format Data |
| 3pe | Intuit TurboTax 2008 Form |
| 3sm | ContextCapture Scalable Mesh |
| 3ws | CityEngine Web Scene |
| 477 | MNS Shape Definition Companion File |
| 4a3 | STABCAL Data |
| 4b3 | STABCAL Data |
| 4br | 4D Backup Description Data |
| 4cm | ClickMouse Macro Set |
| 4db | 4D Database Structure Data |
| 4dc | 4D Database Compiled Structure |
| 4dd | 4D Database Data File |
| 4df | 4D Database Search Document |
| 4dg | 4th Down Football Scout Game Data |
| 4dl | 4D Database Log |
| 4dr | 4D Database Data Resource |
| 4ds | 4D Database Data Segment |
| 4dv | 4D View Ultrasound Data |
| 4dx | 4D Database Plug-in |
| 4lb | 4D Label Editor Data |
| 4mt | MacroToolbar Macro Set |
| 4pk | Perfect Keyboard Macro Set |
| 4sc | forScore Metadata |
| 4sw | 4DOS Swapfile |
| 4tw | Macro Toolworks Macro Set |
| 4ws | Macro Toolworks Data |
| 545 | Aimutation Skin |
| 5d | Microsoft Works Data |
| 5vw | Accellent 5View Packet Capture |
