| Abbreviation | Definition |
|---|---|
| ROC | Restore Old Color |
| ROL | Rotate Left |
| ROL | Rotate Output Left |
| ROR | ROtate Right |
| ROS | Run Of Stack |
| RP | Register Pair |
| RP | Rotate Programmers |
| RPG | Read, Punch, and Grunt |
| RPL | Request Parameter List |
| RPO | Read and Print Only |
| RPR | Ruin Printer Ribbon |
| RPU | Read character and Print Upsidedown |
| RQ | Rotate Quick |
| RR | Register Read |
| RRA | Rodrigues Regional Assembly |
| RRA | Rotating Rectifier Assembly |
| RS | Random Slew (plotters) |
| RS | Read Set |
| RS | Register Select |
| RS | Replace String |