| Abbreviation | Definition |
|---|---|
| TCIS | Thai-Chinese International School |
| TCJ | Thai Chinese and Japanese |
| TCNN | Thai Cable News Network |
| TFCC | Thai Finnish Chamber of Commerce |
| TFFA | Thai Frozen Foods Association |
| TFRC | Thai Farmers Research Center |
| TGDN | Thai Green Design Network |
| THAIL | Thailands |
| THKS | Thai Hip Knee Society |
| THT | Thai Hottie Thursday |
| TIDF | Thai Industrialist Development Forum |
| TIT | Thai Iced Tea |
| TKCC | Thai Korea Calibration Center |
| TLAA | Thai Life Assurance Association |
| TLE | Thai Language Extension |
| TMED | Thai Medical Education Database |
| TMSC | Thai Manufacturing Support Company |
| TNA | Thai News Agency |
| TNU | Thai Nguyen University |
| TPOC | Thailand Paintball Official Circuit |