| Abbreviation | Definition |
|---|---|
| RR | Removal Rate |
| Rrad | Radiation Resistance |
| RRDE | Rotating Ring Disk Electrode |
| RRE | Remote Reader Electronics |
| RRH | Robotic Resistance Handbook |
| RRK | Roof Radial Kit |
| RRR | Residual Resistance Ratio |
| RRRAT | RDA/RPG Remote Access Terminal |
| RS | Remote Sensing |
| RS | Reset and Set |
| RS232 | Recommended Serial 232 |
| RS-232 | Recommended Standard 232 (EIA standard for transmitting serial data) |
| RS-232C | Recommended Standard 232, version C (EIA standard 25-pin interface for transmitting serial data) |
| RS-423 | Recommended Standard 423 (EIA standard for transmitting serial data) |
| RSA | Resistance Sink to Air |
| RSDL | Reverse Spiral Dual Layer |
| RSDS | Reduced Swing Differential Signaling |
| RSE | Reactive Sputter Etch |
| RSE | Referenced Single Ended |
| RSJ | Resistively Shunted Junction |