| TCU | Cal Fire's Tuolumne-Calaveras Unit 
| Others |
| TCU | TACAN Control Unit
| Others |
| TCU | Tactical Combat Uniform
| Others |
| TCU | Tactical Communications Unit
| Others |
| TCU | Tactical Computer Unit
| Others |
| TCU | Tal Colour Unit
| Others |
| TCU | Tall Center Unused
| Others |
| TCU | Tape Control Unit
| Others |
| TCU | Taxi Cab Union
| Others |
| TCU | Teachers Credit Union
| Others |
| TCU | Technical Charitable University
| Others |
| TCU | Tecumseh Council University
| Others |
| TCU | Telecommunication Control Unit
| Others |
| TCU | Telematics Communication Unit
| Others |
| TCU | Telematics Control Unit
| Others |
| TCU | Terminal Control Unit
| Others |
| TCU | Texas C U
| Others |
| TCU | Texas Chainsaw University
| Others |
| TCU | Texas Christian University
| Others |
| TCU | Texas Christian UniversityROSE
| Others |
| TCU | Texas Criminal University
| Others |
| TCU | The Come Up
| Others |
| TCU | Thermal control Unit
| Others |
| TCU | Thompson Center Ugalde
| Others |
| TCU | Three Camming Unit
| Others |
| TCU | Throttle Control Unit
| Others |
| TCU | Through Car Unit
| Others |
| TCU | Time Control Unit
| Others |
| TCU | Timing and Control Unit
| Others |
| TCu | Tinned Copper Conductor
| Others |
| TCU | Toledo Credit Union
| Others |
| TCU | Towering CUmulus
| Others |
| TCU | Trailer Connection Unit
| Others |
| TCU | Trailer Control Unit
| Others |
| TCU | Transitional Care Unit
| Others |
| TCU | Transmission Control Unit
| Hardware, Electronic Devices, Networking |
| TCU | Transportable Computer Unit
| Others |
| TCU | Transportation Communications And Utilities
| Others |
| TCU | Transportation Control Unit
| Others |
| TCU | Transportation, Communication, and Utilities
| Others |
| TCU | Travis Credit Union
| Others |
| TCU | True Color Unit
| Others |
| TCU | True Colour Unit
| Others |
| TCU | True Colour Units
| Others |
| TCU | Trunk Coupling Unit
| Others |
| TCU | Trust Certificate Unit
| Others |
| TCU | Tufts Community Union
| Others |
| TCU | Turbo C Utilities
| Others |