| Abbreviation | Definition |
|---|---|
| RS | Reset |
| RSP | Rounding to Single Precision |
| RSS | Reverse Sense Switch |
| RST | Restart |
| RT | Reset Type |
| RT | Retrieval Type |
| RT | Return Type |
| RTA | Reversing Tool for Assembler |
| RTE | Run Time Error |
| RTN | Return |
| RTNZ | Return if Non-Zero |
| RTO | Real Time Output |
| RTO | Return To One |
| RTRC | Reset Real-Time Clock |
| RTW | Return To Win |
| RU | Read Uncommitted |
| RU | Round Up |
| RUTA | Rescheduled Unit Training Assembly |
| RV | Real Value |
| RV | Receive Variable |