| Abbreviation | Definition |
|---|---|
| TRK | The Royal Knights |
| TRK | Track |
| TRK | Truck |
| TRK | Trunk |
| TRKSUP | Track Supervisor |
| TRL | Technology Readiness Level |
| TRL | The Renegade Legion |
| TRM | Technical Reference Manual |
| TRM | Technical Reference Model |
| TRM | Technical Review Meetinig |
| TRN | Task Requirement Notice |
| TRN | Training |
| TRNG | Training |
| TRO | Tactical Reconnaissance Office |
| TRO | Training and Readiness Oversight |
| TROA | The Reserve Officers Association |
| TROB | Transportation Railway Operating Battalion |
| TRON | Target Recognition Operator Notification |
| TROPO | Troposcatter |
| TROPO | Troposphere |