| Acronym | Meaning |
 | UM | U.S. Minor Outlying Islands (postal Symbol; ISO 3166 Digram) |
| AYU | As Yet Unknown |
| HA | Haiti (FIPS 10-4 Country Code) -High Availability |
| CNN | Cable News Network - Cellular Nonlinear Network |
| MTS | Maintenance Training System - Michigan Terminal/Timesharing System - Movement Tracking System - Multichannel Television Sound - Multi-Technical Services |
| MIDS | Multi-Function Information Distribution System |
| YMD | People's Democratic Republic Of Yemen (ISO 3166 Trigram |
| UKR | Ukrainian Language (ISO 639-2 Code) |
| NHS | National Health Service (UK) |
| SOI | Signal Operating Instruction |
Browse by Letter:
