| Abbreviation | Definition |
|---|---|
| SPARC | Single Person Armed Racing Craft |
| SPARK | Smart People Always Respect Knowledge |
| SPARTACUS | Special Projects Area Reconnaissance Teams, Assessing Critically Urban Security |
| SPAS | Special Purpose Assault Shotgun |
| SPAS | Standard Procurement Appropriation System |
| SPAT | Self Propelled Acoustic Target |
| SPAT | Super Powered Assault Team |
| SPAWAR | Space and Naval Warfare Systems Command |
| SPAZ | Special Patrol Area Zone |
| SPB | Sea Plane Base |
| SPB | Skorostnoi Pikiruyushchnyi Bombardirovshchik |
| SPBO | Spare Parts Breakout |
| SPBS | Standard Property Book System |
| SPBS-R | Standard Property Book System - Redesign |
| SPC | Self-Propelled Cannon |
| SPC | Special Purpose Cartridge |
| SPC | Specialist |
| SPC | Specialist - Army |
| SPC | Strategy and Planning Committee |
| SPCC | Ship Parts Control Center |