| Acronym | Meaning |
 | TSO | The Stationery Office (was HMSO Until 1996) - (U.S.) TRICARE Support Office |
| TJ | Tajikistan (ISO 3166 Digram) - Terajoule |
| BE | Belgium (FIPS 10-4 Country Code; ISO 3166 Digram) |
| HRH | His (or Her) Royal Highness |
| SAWE | Society Of Allied Weight Engineers |
| HG | Mercury (Latin Hydrargyrum) |
| SIAM | Society For Industrial And Applied Mathematics |
| SUN | Sundanese Language (ISO 639-2 Code) |
| UDP | User Datagram Protocol |
| FRA | French Language (ISO 639-2 Code) |
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