| Acronym | Meaning |
| TRB | Tactical Range and Bearing |
| TRB | Tactics Review Board |
| TRB | Tail Rotor Blades |
| TRB | Teacher Registration Board |
| TRB | Technical Requirements Baseline |
| TRB | Technical Review Board |
| TRB | Technology Research Branch (National Personal Protective Technology Laboratory; Pittsburgh, PA) |
| TRB | Test Review Board |
| TRB | Theodore Roosevelt Building |
| TRB | Training Reentry Body |