| Acronym | Meaning |
| TON | Tonga (ISO 3166 Trigram) |
| OEA | (U.S.) Office Of Economic Adjustment |
| TC | Technetium |
| SF&F | Science Fiction & Fantasy |
| HST | See Entry |
| PACOM | (U.S.) Pacific Command |
| AJ | Attojoule |
| XV | Fifteen (in Roman Numerals) |
| SSO | Submarine Oiler (retired US Navy Hull Classification) |
| HAU | Hausa Language (ISO 639-2 Code) |