| Acronym | Meaning |
 | TWN | Republic Of China (Taiwan) (ISO 3166 Trigram) |
| TIM | Technical Information Memorandum - Technical Interchange Meeting - Toxic Industrial Material - Telecom Italia Mobile |
| ACTF | Australian Children's Television Foundation - (U.S.) Army Constructive Training Federation |
| RPO | Radiation Protection Officer |
| SWOT | Strengths |
| ON | Ontario (postal Symbol) |
| CITES | Convention On International Trade In Endangered Species (of Wild Fauna And Flora) (sigh-tease) |
| EST | Estonian Language (ISO 639-2 Code) |
| SVO | Subject |
| GPR | Ground-Penetrating Radar |
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