| Abbreviation | Definition |
|---|---|
| RSTRT | Restart |
| RSU | Remote Service Unit |
| RSVR | Reservoir |
| RSW | Resistance Spot Welding |
| RSYS | Responsible System |
| RT | Radio Telescope |
| RT | Range-to-Target |
| RT | RaTe |
| RT | Receiver-Transmitter |
| RT | Reference Trajectory |
| RT | RighT |
| R-T | Resistance Test |
| RTA | Real-Time Accumulator |
| RTACF | Real-Time Auxiliary Computing Facility |
| RTADS | Real-Time Attitude Determination System |
| RTAG | Range Technical Advisory Group |
| RTAR | Research Topic Acceptance Request |
| RTB | Resistance Temperature Bulb |
| RTC | Real-Time Clock |
| RTC | Real-Time Command |