| Abbreviation | Definition |
|---|---|
| TTC | Toronto Transit Corporation |
| TTCC | Tropical Trading Canada Corporation |
| TTCI | Transportation Technology Center, Inc |
| TTCL | Tanzania Telecommunications Company Limited |
| TTCL | Tanzania Telecommunications Company Ltd |
| TTCL | Tyson Tool Company Limited |
| TTDC | Tennessee Technology Development Corp |
| TTDC | Toyota Technical Development Corp |
| TTDC | Tripura Tea Development Corporation |
| TTE | Tallahassee Telephone Exchange |
| TTE | Thomson Tubes Electroniques |
| TTE | Toy Traders of Europe |
| TTE | Toyota Team Europe |
| TTEI | Tata Tea Extractions Inc |
| TTEL | Toray Textiles Europe Ltd |
| TTF | Tesla Test Facility |
| TTF | The Tesla Test Facility |
| TTFC | The Timber Frame Company |
| TTFC | Trinidad & Tobago Film Company |
| TTG | The Tech Guy |