| Acronym | Definition |
|---|
| TIT | Title |
| TIT | Titus |
| TIT | This Is True |
| TIT | Transactions on Information Theory (IEEE) |
| TIT | Treasurer in Trust (various companies) |
| TIT | Tokyo Institute of Tourism (Tokyo, Japan) |
| TIT | Tokyo Institute of Technology |
| TIT | Turbine Inlet Temperature |
| TIT | This Is Terrible |
| TIT | This Is Thailand (Bangkok Post) |
| TIT | Trans Inside Travel (German relaxation company) |
| TIT | Travel in Taiwan (magazine) |
| TIT | Tenchi In Tokyo (anime) |
| TIT | Time in Transit |
| TIT | Teacher in Training |
| TIT | Total Information Technology (Robin Williams) |
| TIT | Taste in Television (Married with Children) |
| TIT | Technologies de l'Information et des Télécommunications (French: Information Technology and Telecommunications) |
| TIT | Ternary Digit |
| TIT | Trotters Independent Trading |
| TIT | The Internet Times |
| TIT | Triangle Inequality Theorem (algebra and Euclidean geometry) |
| TIT | Temperature Indicating Transmitter |
| TIT | Tripura Institute of Technology (India) |
| TIT | Tennessee Institute of Technology |
| TIT | Tonino International Trading (The Netherlands) |
| TIT | Technician Induced Trouble |
| TIT | Torpedo Impulse Tank |
| TIT | Tugaya Institute of Technology |
| TIT | Trotter's International Trading |
| TIT | Topkatours International Travel (Istanbul, Turkey) |
| TIT | Tactical Intelligence Team (Mad TV) |