TR
- tr – (s) Turkish language (ISO 639-1 code)
- TR – (s) Turkey (ISO 3166 digram)
- TRA – (i) Technology Readiness Assessment
- TRAC – (p) (U.S. Army) TRADOC Analysis Center
- TRACON – (a) Terminal Radar Approach Control
- TRADOC – (p) (U.S. Army) Training and Doctrine Command
- TRAIN – (p) Tourist Railway Association, Inc.
- TRANSCOM – (p) U.S. Transportation Command
- TRAP – (p) Tactical Receive equipment and related Applications
- TRASANA – (p) TRADOC Systems Analysis Agency
- TRD – (i) Towed Radar Decoy
- TRIGAT – (p) Third Generation Antitank (missile)
- TRL – (i) Technology readiness level
- Trp – (s) Troop
- TRP – (i) Target Reference Point – (p) Time of Reporting
- TRU – (a) Transuranic
- TRUEX – (p) Training in Urban Environment Exercise
- TRW – (i) Thompson Ramo Wooldridge Inc.
- TRY – (s) Turkish lira (ISO 4217 currency code)
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