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| Extension | File Type Developer | File Category | File Type Description | Software | Software Developer |
|---|---|---|---|---|---|
| .4DA | 4D, Inc | Database Files | 4th Dimension Database Data File | 4D V17 | 4D, Inc |
| .4DD | 4D, Inc | Database Files | 4th Dimension Database Data File | 4D V17 | 4D, Inc |
| .4DR | 4D, Inc | Data Files | 4th Dimension Data Resource File | 4D | 4D, Inc |
| .4DS | 4D, Inc | Data Files | 4th Dimension Database Windows Data Segment | 4D | 4D, Inc |
| .4DX | 4D, Inc | Plugin Files | 4th Dimension Plugin File | 4D | 4D, Inc |
| .4FI | 4D, Inc | Developer Files | 4th Dimension Insider File | 4D SQL | 4D, Inc |
| .4LB | 4D, Inc | Data Files | 4D Label Editor Data | 4D | 4D, Inc |
| .4QR | 4D, Inc | Text Files | 4th Dimension Database Windows Quick Report | 4D | 4D, Inc |
| .4ST | 4D, Inc | Database Files | 4th Dimension Database Data File | 4D V17 | 4D, Inc |
| .4VR | 4D, Inc | Data Files | 4th Dimension Database Windows Saved Variable | 4D | 4D, Inc |
| .4W7 | 4D, Inc | Data Files | 4D Write Document | 4D | 4D, Inc |
| .4WT | 4D, Inc | Data Files | 4D Write Template | 4D | 4D, Inc |
| .ESR | 4D, Inc | Data Files | 4D Database External Data | 4D | 4D, Inc |
| .GOD | 4D, Inc | Game Files | Gore Game Data File | Gore: Ultimate Soldier | 4D, Inc |
| .PTH | 4D, Inc | Uncommon Files | 4D Path Document | 4D | 4D, Inc |
| .REX | Propellerhead | Audio Files | ReCycle Loop File | 4D | 4D, Inc |
| .TFR | LucasArts Entertainment Company, LLC | Game Files | TIE Fighter Pilot File | 4D | 4D, Inc |
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