| Abbreviation | Definition |
|---|---|
| SFW | Sensor Fused Weapon |
| SFW | Sensor Fuzed Weapon |
| SFW | Students For War |
| SG | Sea Going |
| SG | Siva Gate |
| SG | South Gate |
| SG | Strike Group |
| SG | Sturm Gewehr |
| SG | Suicidal Grenadiers |
| SG | Suicide Girls |
| SG | Surface search, General |
| SGA | Standards of Grade Authorization |
| SGC | Select Grouped Controls |
| SGC | Silicon Graphics Crimson |
| SGEMP | System-Generated Electromagnetic Pulse |
| SGI | Small-Group Instruction |
| SGL | Small Group Leader |
| SGLI | Servicemen's Group Life Insurance |
| SGM | Segunda Guerra Mundial |
| SGM | Sergeant Major |