| Acronym | Definition |
|---|
| TCU | Texas Christian University |
| TCU | Tribunal de Contas da União (Court of Accounts, Brazil) |
| TCU | Transitional Care Unit |
| TCU | Transmission Control Unit |
| TCU | Turbo C Utilities |
| TCU | Timing and Control Unit |
| TCU | Teachers Credit Union |
| TCU | Thailand Cyber University |
| TCU | Towering Cumulus (meteorological) |
| TCU | Towering Cumulus (cloud formation) |
| TCU | Tribal Colleges and Universities |
| TCU | Transportation Communications International Union |
| TCU | Temperature Control Unit |
| TCU | Total Cost of Utilization (service payment) |
| TCU | Terminal Control Unit |
| TCU | Terms and Conditions of Use |
| TCU | Teacher's Credit Union |
| TCU | Trunk Coupling Unit |
| TCU | Transportation, Communications, and Utilities |
| TCU | Timing Control Unit |
| TCU | Tape Control Unit |
| TCU | Transit Canine Unit (NY Police Department) |
| TCU | Telemetry Control Unit |
| TCU | Transports Collectifs Urbains (French: Urban Public Transport) |
| TCU | Thermal Combustion Unit (oilfields) |
| TCU | Threat Containment Unit |
| TCU | Traffic Control Unit |
| TCU | Transmitter Control Unit |
| TCU | Teletypewriter Control Unit |
| TCU | Transportable Computer Unit |
| TCU | Transportation Coordination Unit (emergency management) |
| TCU | Tactical Control Unit |
| TCU | True Colour Unit |
| TCU | Telecommunications Control Unit |
| TCU | Tri-Cam Unit (Rock Climbing Equipment) |
| TCU | Thruster Control Unit |
| TCU | Test Control Unit |
| TCU | Tight Close-Up |
| TCU | Turbocharge Control Unit |
| TCU | Time Code Unit |
| TCU | Tactical Computer Unit |
| TCU | Tactical Communications Unit |
| TCU | TRANSEC/COMSEC Unit |
| TCU | Transaction Control Unit |
| TCU | The Christian Underground |
| TCU | Task Control Unit |
| TCU | Technical Compliance Unit |
| TCU | Test of Concept Utilization |
| TCU | Terminal Command Update |
| TCU | Thrust Control Unit |
| TCU | Transportation Control Unit |
| TCU | Tourism Coordination Unit |
| TCU | Tracking Control Unit (UAV) |
| TCU | Test Computer Unit |
| TCU | Trunk Compatibility Unit |
| TCU | Torpedo Control Unit |
| TCU | Tennis Club Universitaire (French: University Tennis Club; Switzerland) |
| TCU | Telemetry and Command Unit (military satellite communications) |
| TCU | Transit Control Unit |
| TCU | Transportation and Communication Union (Canada) |
| TCU | Teletype Control Unit |
| TCU | Teletype Communications Unit |
| TCU | Time Critical Units |
| TCU | Test Compatibility Unit |
| TCU | Tri-City University |
| TCU | Track Calibration Unit |
| TCU | Timestamp Check Unit |
| TCU | Techniques Contre l'Usure (French: Techniques against Wear) |
| TCU | Trust Certificate Unit |
| TCU | Team Carrie Underwood |
| TCU | Transport Colis Urgent (French: Urgent Transport Parcels) |