| Acronym | Meaning |
 | TIR | Tigrinya Language (ISO 639-2 Code) |
| MARCENT | United States Marine Forces Central Command |
| AAI | Applied Artificial Intelligence |
| DCIMS | Dental Classification Information Management System - Dismounted Combat Identification Marking System |
| OSS | Office Of Strategic Services (1942?1945 |
| MTV | MainosTeleVisio (Finnish Commercial TV Company) - Music TeleVision |
| ETA | Estimated Time Of Arrival -Euzkadi Ta Azkatasuna (etta |
| VAT | Value-Added Tax -Vatican City-State (ISO 3166 Trigram) |
| EK | Equatorial Guinea (FIPS 10-4 Country Code) - Exakelvin |
| AQ | American Samoa (FIPS 10-4 Territory Code) - Antarctica (ISO 3166 Digram) |
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