| Abbreviation | Definition |
|---|---|
| RND | AutoCAD AutoShade Rendering Slide |
| RNG | Ringing tone ( Nokia Communicator) |
| RNK | Diap-up shortcut |
| RNO | VAX Runoff file |
| ROF | Reliasoft Reliability Growth File |
| ROFF | Unformatted manual page (Roff/nroff/troff/groff) |
| ROL | Roland music file ( Adlib) |
| ROM | Read Only Memory image (emulators - AONs) |
| ROT | Rotater 3D image |
| ROV | Rescure Rover Game data |
| RPB | CP Backup Data Report file |
| RPD | Database (RapidFile) |
| RPF | AutoCAD Repeatable Pattern |
| RPL | Replica Document |
| RPL | Replica Text document |
| RPL | Reply message |
| RPM | RealAudio Plugin |
| RPT | Report |
| RS | Amiga Resource - Reassembler Data file |
| RS | Resource fork of a Macintosh file |