| Abbreviation | Definition |
|---|---|
| NACA | Network of Aquaculture Centres in Asia-Pacific |
| NCTL | National Congress of Thai Labour |
| RAST | Radio Amateur Society of Thailand |
| RTAF | Royal Thai Air Force |
| RTGS | Royal Thai General System |
| RTMC | Royal Thai Marine Corps |
| RTN | Royal Thai Navy |
| RTPH | Royal Thai Police Headquarters |
| SOAT | Society Of Actuaries Of Thailand |
| SUMT | Sydney Uni Muay Thai |
| TABA | Thai America Bar Association |
| TABA | Thai American Bar Association |
| TAI | Thai Aviation Industries |
| TALAS | Thai Association for Laboratory Animal Science |
| TAST | Thai Academy of Science and Technology |
| TBCC | Thai Business Council in Cambodia |
| TBEC | Thai Biogas Energy Company |
| TBIA | Thai Bioplastics Industry Association |
| TBP | Thai Block Plate |
| TCIN | Thai Cancer Information Network |