| Abbreviation | Definition |
|---|---|
| TSC | Theater Support Command |
| TSC | Theater Sustainment Command (Army) |
| TSC | Top Secret Club |
| TSC | Training Support Center |
| TSC | Trojan Switching Center |
| TSCE | Total Ship Computing Environment |
| TSCIF | Tactical Sensitive Compartmented Information Facility |
| TSCM | Technical Surveillance Countermeasures |
| TSCO | Target Selection Confusion of The Operator |
| TSCO | Top Secret Control Officer |
| TSCP | Theater Security Cooperation Plan |
| TSCPI | Trans-Sahara Counterterrorism Partnership |
| TSCR | Time Sensitive Collection Requirement |
| TSCTI | Trans-Saharan Counterterrorism Initiative |
| TSD | Tactical Support Demonstration |
| TSD | Tactical Surveillance Demonstration |
| TSD | Target Site Duplication |
| TSD | Threat Support Division |
| TSD | Threats Support Division |
| TSD | Training Systems Division |