| Acronym | Meaning |
| MAR | Morocco (ISO 3166 Trigram) |
| NU | Nicaragua (FIPS 10-4 Country Code) - Niue (ISO 3166 Digram) - Nunavut (postal Symbol) |
| TH | Terahenry - Thailand (ISO 3166 And FIPS 10-4 Country Code Digram) |
| IAQ | Indoor Air Quality - Infrequently Asked Questions |
| AK | Alaska (postal Symbol) |
| VTC | Video Tele-Conference |
| MJ | Millijoule |
| SOCCSKSARGEN | South Cotabato |
| PSYOP | Psychological Operations |
| CBLA | Comparative Bullet Lead Analysis |