English abbreviations from umtri to unclos
- UMTRI (University of Michigan Transportation Research Institute)
- UMTS (Universal Mobile Telecommunications System)
- UMU (University of Manchester Union)
- UMUC (University of Maryland University College)
- UMV (Upper Master Valve (from a Xmas tree))
- UMW (Ultra-MicroWave)
- UMWV (Ultimate Maximum Working Voltage)
- UMWW (Unprocessed Municipal Waste Water)
- UN (United Nations)
- UNA (United Nations Association of the USA)
- UNAAF (UNified Action Armed Forces)
- UNAB (Uganda National Association for the Blind)
- UNABOM (University and airline bomber (FBI case name))
- UNAD (Universidad Nacional Abierta y a Distancia (Colombia))
- UNAIDS (Joint United Nations Programme on HIV/AIDS)
- UNaM ((p/a) Universidad Nacional de Misiones (Spanish, "National University of Misiones"))
- UNAMIR (United Nations Assistance Mission In Rwanda)
- UNAMSIL (United Nations Mission in Sierra Leone)
- UNAS (Universal Network Architecture Services)
- UNAUSA (United Nations Association of the United States of America)
- UNB (Universidade de Brasília)
- UNBA (United Natural Bodybuilding Association)
- UNBC (University of Northern British Columbia)
- UNC (United National Congress)
- UNCA (United Neighborhood Centers of America)
- UNCAI (United Neighborhood Centers of America, Inc.)
- UNCCD (United Nations Convention to Combat Desertification)
- UNCF (United Negro College Fund)
- UNCHAP (United Neighborhood Citizen's Home Appearance Patrol)
- UNCLOS (United Nations Convention on the Law of the Sea)
