| Acronym | Meaning |
| BK | Berkelium |
| ELM | Edge-Localised Mode (plasma Physics) |
| UNFCCC | United Nations Framework Convention On Climate Change |
| TL | Team Leader -Teralitre - Timor-Leste (ISO 3166 Digram) -ThermoLuminescence |
| TJ | Tajikistan (ISO 3166 Digram) - Terajoule |
| SINCGARS | SINgle Channel Ground And Airborne Radio System |
| NORAD | North American Aerospace Defense Command |
| VISCII | VIetnamese Standard Code For Information Interchange |
| BAK | Bashkir Language (ISO 639-2 Code) |
| CAI | Computer Assisted Instruction |