| Abbreviation | Definition |
|---|---|
| RSS | Root-Sum-Squared |
| RSSA | Regional Supply Support Activity |
| RSSC | Regional Satellite Communications (SATCOM) Support Center |
| RSSC | Regional Satellite Support Cell |
| RSSC | Regional SIGINT (SIGnals INTelligence) Support Center |
| RSSC | Regional SIGINT Support Center |
| RSSC | Regional Signals Intelligence (SIGINT) Support Center (NSA) |
| RSSC | Regional Space Support Center |
| RSSC-LO | Regional Satellite Communications Support Center Liaison Officer |
| RSSC-LO | Regional Space Support Center Liaison Officer |
| RSSI | Received Signal Strength Indicator |
| RSSIA | Regional Security Strategy Implementation Analysis |
| RST | Religious Support Team |
| RSTA | Reconnaissance, Surveillance, and Target Acquisition |
| RSTV | Real-Time Synthetic Video |
| RSU | Rapid Support Unit |
| RSU | Rear Support Unit |
| RSV | Radar System Vehicle (RSV of COBRA.) |
| RSVP | Reports Scenario Verification Program |
| RSVPS | Reverse Screen Projection System |