| Acronym | Meaning |
 | TNO | Trans-Neptunian Object |
| MSDL | Military Scenario Definition Language |
| ATC | Air Traffic Control - Air Training Corps - U.S. Air Transport Command (1942-1948) |
| MARBEF | Marine Biodiversity And Ecosystem Functioning |
| FAB | Feline Advisory Bureau (UK Feline Charity) |
| PT | Petatesla -Physical Training (in The Army) -Portugal (ISO 3166 Digram) |
| ZN | Zeptonewton |
| VUT | Vanuatu (ISO 3166 Trigram) |
| USDA | United States Department Of Agriculture |
| RAMARK | RAdar MARKer |
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