| Acronym | Definition |
|---|
| TU | Tuesday |
| TU | Thank You (logging abbreviation) |
| TU | Technische Universität (German: Technical University) |
| TU | Turkey |
| TU | Technische Universiteit (Dutch) |
| TU | Tucuman (Argentina province) |
| TU | The Used (band) |
| TU | Tupolev (Russian aircraft) |
| TU | Towson University (Towson, MD) |
| TU | Trade Union |
| TU | Thammasat University (Thailand) |
| TU | University of Tulsa |
| TU | Temple University |
| TU | TransUnion (credit reporting agency) |
| TU | Trout Unlimited |
| TU | Tunisair (IATA airline code) |
| TU | Tohoku University (Japan) |
| TU | Tufts University (Medford, MA, USA) |
| TU | Tulane University |
| TU | Trent University (UK) |
| TU | Tokyo University |
| TU | Trinity University |
| TU | Texas University |
| TU | Time's Up |
| TU | Translation Unit (CAT software) |
| TU | Taylor University (Fort Wayne, Indiana) |
| TU | Tuskegee University |
| TU | Tribhuvan University (Nepal) |
| TU | Training Unit |
| TU | Tiffin University |
| TU | Transmission Unit |
| TU | Tren Urbano (Puerto Rico's rapid transit) |
| TU | Table Update |
| TU | Trnavská Univerzita (University of Trnava, Slovakia) |
| TU | Task Unit |
| TU | Tulsa University |
| TU | Tits Up (slang for inoperational) |
| TU | University of Teesside (UK) |
| TU | Tokyo Underground (anime) |
| TU | Thermal Unit |
| TU | Technology Utilization |
| TU | Tübingen University (Tubingen, Germany) |
| TU | Tactical Unit |
| TU | Toes Up (dead) |
| TU | Andrei Tupolev (father; Russian aircraft designer) |
| TU | Trump University |
| TU | Tango Uniform (military slang for Tits Up; inoperational) |
| TU | Tabriz University |
| TU | Toxic Unit |
| TU | Turbidity Unit |
| TU | Tritium Unit |
| TU | Temporary Unit |
| TU | Alexei Tupolev (son; Russian aircraft designer) |
| TU | Travel Underwriters |
| TU | Taif University (Saudi Arabia) |
| tU | Tonnes Uranium |
| TU | Traversing Unit |
| TU | Triam Udom Suksa School (Bangkok, Thailand) |
| TU | Typical Urban Area (terrain type) |
| TU | Telephone Update |
| TU | Theundertaking (website) |
| TU | Technicheskie Usloviya (Russian specifications) |
| TU | Transcriber/Task Unit |
| TU | Tuvalu (South Pacific country) |