| Abbreviation | Definition |
|---|---|
| RSA | Returned Services Association |
| RSA | Rivest-Shamir-Adleman |
| RSAD | Reduced Scale Advanced Development |
| RSAF | Royal Saudi Air force |
| RSAS | RAND Strategy Assessment System |
| RSB | Railway Shop Battalion |
| RSBP | Recruit School By-Pass |
| RSC | Reconnaissance Strike Complex |
| RSC | Red Station Clock |
| RSC | Regional Service Center |
| RSC | Regional Support Center |
| RSC | Rescue Sub-Center |
| RSD | Reporting of Supply Discrepancy |
| RSE | Retrograde Support Element |
| RSF | Rapid Support Forces |
| RSF | Redundant Server Facility |
| RSF | Retail Stock Fund |
| RSF | Roblox Special Forces |
| RSG | Reference Signal Generator |
| RSG | Regional Support Command Group |