| Abbreviation | Definition |
|---|---|
| RWL | Real World Look |
| RWL&F | Real World Look and Feel |
| RWSI | Remote Workstation Interface |
| RWW | Read While Write |
| RWX | Read, Write, Execute permission |
| RX | Reactive Experision |
| RX | Regular Expression |
| RXV | Receiver Video |
| RYB | Red Yellow Blue |
| S | Superuser |
| S | Symbol |
| S/N | Serial Number |
| SA | Scalable Architecture |
| SA | Service Agent |
| SA | Set Attribute |
| SA | Shutdown Acknowledged |
| SA | Stand Alone |
| SA | System Audit |
| SAA | Standard Application Architecture |
| SAA | Storage Accounting Area |