| Abbreviation | Definition |
|---|---|
| RVR | Runway Visual Range |
| RVS | Rapid Visual Screening |
| RVS | ReVerSe |
| RVV | Runway Visibility Value |
| RW | Reaction Wheel |
| RW | Response Word |
| RWA | Reaction Wheel Assembly |
| RWD | Right Wing Down |
| RWI | Radio Wire Integration |
| RWI | Remote Weight Indicator |
| RWK | Re-Work |
| RWL | Recommended Weight Limit |
| RWM | Read/Write Memory |
| RX | Receive |
| RYD | Real Year Dollars |
| RZ | Return-to-Zero |
| S | Second |
| s | Second (Astronomical Tables) |
| S | Side |
| S | Star |