| Abbreviation | Definition |
|---|---|
| STC | Subject To Classification |
| STC | Supply & Transport Company |
| STCCS | Strategic Theater Command and Control System |
| STCP | Soft Top Command Post (M998 vehicle) |
| STD | Software Test Description |
| STD | Standard |
| STD | Synthetic Training Device |
| STD | Syrian Terrorist Detector |
| STDM | Synchronous Time Division Multiplexer |
| STDS | Signal Tube Detonator System |
| STE | Special Test Equipment |
| STEAL | Strategically Take Equipment Alternate Location |
| STEAL | Supplies Taken in Excess of Allocated Listings |
| STEB | Star Excursion Balance Test |
| STEF | Special Trained Elite Force |
| STEL | STU III Standford Telecommunications (Secure Telephone) |
| STEP | Software Test and Evaluation Plan |
| STEP | Standard for The Exchange of Product model data (ISO 10303) |
| STEP | Standard Tool for Employment Planning |
| STEP | Standardized Tactical Entry Point |