| Abbreviation | Definition |
|---|---|
| UMF | User Message Format |
| UMIB | Urgent Marine Information Broadcast |
| UMK-3 | Tactical Environmental Support System / Shipboard Meteorological and Oceanographic Observing System |
| UMLA | United Minorities Liberation Army |
| UMLA | United Minority Liberation Army |
| UMMCA | Unspecified Minor Military Construction Army |
| UMMCA | Unspecified Minor Military Construction Authority |
| UMMCA | Unspecified Minor Military Construction, Army |
| UMMCA | Urgent Minor Military Construction Army |
| UMMIPS | Uniform Material Movement and Issue Priority System |
| UMMIPS | Uniform Materiel Movement and Issue Prioritizing System |
| UMMIS | USAREUR (United State Army Europe) Medical Management Info System |
| UMMIS | USAREUR Medical Management Info System |
| UMO | Unit Movement Officer |
| UMO | Unknown Moving Object |
| UMOC | Unit Movement Officer Course |
| UMP | Unit Management Plan |
| UMP | Universal Machine Pistol |
| UMPR | Unit Manpower Personnel Record |
| UMQ | Weather Instrument designation |