| Abbreviation | Definition |
|---|---|
| TTI | Temporarily Totally Incapacitated |
| TTL | Transistor-Transistor Logic |
| TTN | Transient Tachypnea Of The Newborn |
| TTO | Technical Training Officer |
| TTP | Thrombotic Thrombocytopenia Purpura |
| TTS | Tumour Targeted Superantigens |
| TTS | Transdermal Therapeutic System |
| TTT | Tibial Tubercle Transfer |
| TUAN | The Urban Agriculture Network |
| TUC | Trade Union Congress |
| TULF | Tamil United Liberation Front |
| TUO | Technology Utilization Officer |
| TUPR | Trans-urethral Prostatic Resection |
| TUR | Trans-Urethral Resection Of The Prostate |
| TV | Television |
| TVAF | Tv Anytime Forum |
| TVF | Twin Valley Farms |
| TVH | Tennessee Valley Homebrewer |
| TVH | Total Vaginal Hysterectomy |
| TW | Time Wait |
| TWA | Trans-World Airlines (USA) |
| TWAIN | Technology Without An Interesting Name |
| TWB | Touch Weight Bear |
| TWIP | Twentieth Of A Point |
| TXC | Transmission Complete flag |
| TXH | Transmit High |
| TXH | Transfer on High |
| TYPE | display a file's content |
| TZB | Tumor Zentrum Berlin |