| Abbreviation | Definition |
|---|---|
| RRW | Reduced Radiation Weapon |
| RS | Radio Set |
| RS | Radio Spares |
| RS | Radio System |
| RS | Rapid Shot |
| RS | Rate Synthesizer |
| RS | Really Shiny |
| RS | Recommended Standard |
| RS | Reconnaissance/ Surveillance |
| RS | Relative Strength |
| RS | Religious Support |
| RS | Remote Sentry |
| RS | Request for Support |
| RS | Requirement Submission |
| RS | Rescue and Survival |
| RS | Returns Salute |
| RS-232 | Recommended Standard 232 (EIA standard for transmitting serial data) |
| RS-423A | Recommended Standard 423A2 (ANSI/EIA standard for transmitting serial data) |
| RSA | Regimental Support Area |
| RSA | Retrograde Storage Area |