| Acronym | Meaning |
| NSS | (U.S.) Naval Simulation System |
| ACINT | Acoustic Intelligence |
| YI | Yiddish Language (ISO 639-1 Code) |
| IPO | Initial Public Offering |
| MSA | Malay Language (ISO 639-2 Code) |
| F | Farad - Fluorine |
| MEA | Maine Educational Assessment - Middle East Airlines - Millennium Ecosystem Assessment - Minimum Enroute Altitude - Mono-ethanol Amine - Multilateral Environmental Agreement |
| ACO | Airspace Control Order |
| URD | User Requirements Document |
| MEF | U.S. Marine Expeditionary Force - Minimum Essential Facility - Mission Essential Force |