| Abbreviation | Definition |
|---|---|
| TR | Thrust Reverser |
| TR | Time to Retrofire |
| TR/SBS | Teleoperator Retrieval/Skylab Boost System |
| TR1 | Payload Furnished Mars Tape Recorder (1 of 2) |
| TR2 | Payload Furnished Mars Tape Recorder (2 of 2) |
| TRA | Training Requirements Analysis |
| TRA | Turnaround Requirements Analysis |
| TRACE | Transition Region And Coronal Explorer |
| TRACS | Tool-Record Accountability System |
| TRAJ | Trajectory |
| TRANS | Transition |
| TRANS | Translation |
| TRANSL | Translation |
| TRAP | The Rocket Arena Project |
| TRB | TDR Review Board |
| TRB | Technical Review Board |
| TRB | Test Review |
| TRBL | Troubleshooting |
| TRC | Thermodynamics Research Center |
| TRC | Transmitter Receiver Computer |