| Abbreviation | Definition |
|---|---|
| RAT | RATS Datafile |
| RAW | Adobe Photoshop Raw format |
| RAW | Rapid American Withdrawal |
| RAW | Raw 24-bit RGB Bitmap graphics |
| RAW | Raw Sound data ( PCM) |
| RAW | RAW uncompressed image file |
| RAW | Reconfigurable Architecture Workstation |
| RAY | Rayshade |
| RB | Richard Bruce |
| RBF | Rbase Datafile |
| RBLX | Roblox Level File format |
| RC | C++ Resource script |
| RC | EMACS Configuration Record |
| RC | Racing Champions |
| RC | Radio Control |
| RC2 | MicroSoft Developer Studio Not editable resource |
| RCG | Netscape Newsgroup file |
| RCL | Real Combat League |
| RCT | Microsoft Developer Studio Resource Template |
| RD3 | Ray Dream Designer 3 Graphics |