TR
- .tr
- Berliet TR
- Ferrari TR (set index)
- HTML element
- ISO
- Korg Triton
- Lockheed U-2
- Physics of magnetic resonance imaging
- Presidency of Theodore Roosevelt
- Scoot
- T. Rajendar
- T. Ramachandran (writer)
- TR postcode area
- TR-808
- TR-909
- Taiwan Railway
- Talyllyn Railway
- Tax refund
- Tax return
- Taxonomic rank
- Team Rubicon
- Terminal Reality
- Terran Republic (PlanetSide)
- Texas Roadhouse
- Textus Receptus
- Thai Rung Union Car
- Theodore Roosevelt
- Thomson Reuters
- Thyroid hormone receptor
- Tiger Airways
- Tokyu Corporation
- Tomahawk Railway
- Tomb Raider
- Ton of refrigeration
- Toronto Rocket
- Total return
- Tr (digraph)
- Trace (linear algebra)
- Training routines (Scientology)
- Transbrasil
- Travelers Rest, South Carolina
- Tricuspid regurgitation
- Trill (music)
- Tripura
- Triumph Motor Company
- Turkey
- Turkish language