| Abbreviation | Definition |
|---|---|
| ROIC | ReadOut Integrated Circuit |
| ROM | Read Only Memory |
| ROM | Read only memory (or read only storage) |
| ROR | Range-Only Radar |
| ROS | Record On Silicon |
| ROTFL | Range Over Test Frequency Level |
| ROX | Run Of eXperiments |
| RP | Regulated Phase |
| RP | Reverse Polarity |
| RPC | Remote Procedure Call |
| RPEV | Road-Powered Electric Vehicle |
| RPG | Rotary Pulse Generator |
| RPM | Revolutions Per Minute |
| RPNO | Remote Plasma Nitrided Oxide |
| RPO | Resist Protection Oxide |
| RPPR | Realtime Pattern Play and Record |
| RPS | Redundant Power Supply |
| RPT | Rudder Pedal Transducer |
| RQ | Reportable Quantity |
| RQH | Raditek Quadrature Hybrid |