| Acronym | Meaning |
 | ATN | Dronning Maud Land (ISO 3166 Trigram; Merged With AQ In 1983) |
| LUX | Luxembourg (ISO 3166 Trigram) |
| AFK | Away From Keyboard (Internet Chat Abbreviation) |
| BU | Bulgaria (FIPS 10-4 Country Code) - Burma (ISO 3166 Digram; Obsolete Since 1989) |
| CADCAM | Computer-Aided Design/Computer-Aided Manufacturing |
| ZT | Zettatesla |
| TMA | Texas Medical Association |
| MGB | Medium Girder Bridge |
| PR | Public Relations -Puerto Rico (postal Symbol; ISO 3166 Digram) |
| PAL | Phase Alternating Line (TV Standard) -Philippine Airlines |
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