| Abbreviation | Definition |
|---|---|
| SEW | Shared Early Warning |
| SEWCC | Signal Intelligence Electronic Warfare Coordination |
| SEWG | Special Events Working Group |
| SEWIP | Surface Electronic Warfare Improvement Program |
| SEWS | Satellite Early Warning System |
| SEWTAWS | Space and Electronic Warfare Tactical Advanced Work Station |
| SF | Security Force |
| SF | Security Forces |
| SF | Security Forces (Air Force or Navy) |
| SF | Special Forces |
| SF | Square Feet |
| SF | Standard Form |
| SF | Sustained Fire |
| SFA | Security Force Assistance |
| SFA | Shaq Fu Army |
| SFADS | San Fransisco Air Defense Sector |
| SFAF | Standard Frequency Action Format |
| SFAS | Special Forces Assessment and Selection |
| SFAT | Special Forces Adventure Training |
| SFC | Sargent First Class |