(Main list of acronyms)
__NOTOC__ U – (s) Uranium U&E – Urea and electrolytes, see also Basic metabolic panel
UA UA – (s) Ukraine (ISO 3166 digram) (i) Unit of Action UAAP – (i) University Athletic Association of the Philippines UAB (i) Universitat Autònoma de Barcelona (Spanish for "Autonomous University of Barcelona") (i) University of Alabama at Birmingham (cf. UAB Blazers, the university's athletic program) (i) Upravlyayemaya aviatsionnaya bomba (Russian for "Guided aerial bomb") UAE – (i/s) United Arab Emirates (also IOC and FIFA trigram, but not ISO 3166) UAH (s) Ukrainian hryvnia (ISO 4217 currency code) (i) University of Alabama in Huntsville UAR (i) Uniformly At Random (probability) Unión Argentina de Rugby (Spanish for "Argentine Rugby Union") United Arab Republic UAV – (i) Unmanned Aerial Vehicle
UB UBA – Unbundled Bitstream Access UBC (i) United Baptist Church University of British Columbia UBE – (i) Uniform Bar Examination (US) UBI – Universal basic income UBIGEO – (i) Ubicación Geografica (Spanish for Geographical Location) UBS – Union Bank of Switzerland
UC UCAV – (a/i) Unmanned Combat Air Vehicle UCBSA – (i) United Cricket Board of South Africa UCF – (i) University of Central Florida (cf. UCF Knights, this school's athletic program) UCI (i) Union Cycliste Internationale (French, "International Cycling Union") University of California, Irvine UÇK – (i) initialism for two Albanian guerrilla movements UCLA – (i) University of California, Los Angeles (cf. UCLA Bruins, this school's athletic program) UCLES – (i) University of Cambridge Local Examinations Syndicate UCR (i) University of Costa Rica University of California, Riverside UCS – (i) Union of Concerned Scientists UCSB – (i) University of California, Santa Barbara UCSD – (i) University of California, San Diego
UD UDAS – (a) Uppsala-DLR Asteroid Survey UDDI – (a) Universal Description, Discovery and Integration UDP – (i) User Datagram Protocol UDT – (i) Underwater Demolition Team UDTS – (i) Uppsala-DLR Trojan Survey
UE UE – (i) Unit of Employment UEFA – (a) Union of European Football Associations UEFI - (i/a) Unified Extensible Firmware Interface UESAC – (a) Uppsala-ESO Survey of Asteroids and Comets
UF UFC – (i) Ultimate Fighting Championship UFO (i) Unidentified flying object United Farmers of Ontario
UG ug – (s) Uyghur language (ISO 639-1 code) UG – (s) Uganda (ISO 3166 and FIPS 10-4 country code digram) UGA – (s) Uganda (ISO 3166 trigram) UGV – (i) Unmanned Ground Vehicle UGX – (s) ugandan shilling (ISO 4217 currency code)
UH UHF – (i) Ultra High Frequency UHMW – (i) Ultra-high-molecular-weight polyethylene UHRB – (i) Ultra-High Resolution Building (simulation) UHSP – (i) University of Health Sciences and Pharmacy (in St. Louis) UHNWIs - (i) Ultra High Net Worth Individuals Investopedia and Wikipedia
UI UIC – (i) University of Illinois Chicago UID – (i) User ID uig – (s) Uyghur language (ISO 639-2 code) UIL – (i) University Interscholastic League (governing body for most interscholastic activities, notably sports, in Texas public high schools) UIUC – (i) University of Illinois Urbana-Champaign UIW – (i) University of the Incarnate Word
UJ UJTL – (i) Universal Joint Task List UJT – Unijunction transistor
UK uk – (s) Ukrainian language (ISO 639-1 code) UK (i) United Kingdom (also (s) FIPS 10-4 country code) (i) University of Kentucky UKDA – (i) United Kingdom Data Archive UKIP - (a) UK Independence Party ukr – (s) Ukrainian language (ISO 639-2 code) UKR – (s) Ukraine (ISO 3166 trigram)
UL UL – (i) Underwriters Laboratories ULEB – (a) Union des ligues européens de basket-ball, French for "Union of European Basketball Leagues" ULF – (i) Ultra Low Frequency ULOF – unprotected loss of flow (nuclear accident) ULOHS – unprotected loss of heat sink (nuclear accident) UTOP – unprotected transient overpower (nuclear accident)
UM UM – (s) United States Minor Outlying Islands (postal symbol; ISO 3166 digram) UMA – (i) Upper Memory Area UMB – (i) University of Maryland, Baltimore UMBC – (i) University of Maryland, Baltimore County UMC – (i) United Microelectronics Corporation – University of Missouri–Columbia UMD – (i) University of Maryland, College Park UMCP – (i) University of Maryland, College Park UMES – (i) University of Maryland Eastern Shore UMGC – (i) University of Maryland, Global Campus UMI – (s) United States Minor Outlying Islands (ISO 3166 trigram) UMIST – (a) University of Manchester Institute of Science and Technology UMK – (i) Uniwersytet Mikołaja Kopernika (Polish "Nicolaus Copernicus University") UML – (i) Unified Marxist-Leninist Communist Party of Nepal – Unified Modeling Language – University of Massachusetts Lowell – User-Mode Linux UMNO – (a) United Malays National Organisation (Malaysia) UMTS – (i) Universal Mobile Telecommunications System
UN UN – (i) United Nations UNABOM – (p) University and airline bomber (FBI case name) UNAIDS – (i/a) Joint United Nations Programme on HIV/AIDS UNaM – (p/a) Universidad Nacional de Misiones (Spanish, "National University of Misiones") UNAM – (a) Universidad Nacional Autónoma de México (Spanish, "National Autonomous University of Mexico") UNAMSIL – (p) United Nations Mission in Sierra Leone UNCF – (i) United Negro College Fund UNCLOS – (a) United Nations Convention on the Law of the Sea UNCSGN – (i) United Nations Conference on the Standardization of Geographical Names UNCTAD – (p) United Nations Conference on Trade and Development UNDCP – (i) United Nations Drug Control Programme UNDE – (i/a) Union of National Defence Employees (Canada) UNDP – (i) United Nations Development Programme UNEP – (a) United Nations Environment Programme UNESCO – (a) United Nations Educational, Scientific and Cultural Organization UNFCCC – (i) United Nations Framework Convention on Climate Change UNFICYP – (p) United Nations Peacekeeping Force in Cyprus UNGEGN – (i) United Nations Group of Experts on Geographical Names UNHCR – (i) United Nations High Commissioner for Refugees UNICEF – (a) United Nations Children's Fund (originally the United Nations International Children's Emergency Fund) UNICRI – (p) United Nations Interregional Crime and Justice Research Institute UNIDO – (a) United Nations Industrial Development Organization UNIFEM – (p) United Nations Development Fund for Women (from the French Fonds de développement des Nations unies pour la femme) UNIS – (p) University of Surrey UNLV – (i) University of Nevada, Las Vegas UNMIK – (p) United Nations Interim Administration Mission in Kosovo UNMOVIC – (p) United Nations Monitoring, Verification and Inspection Commission UNOSOM – (p) United Nations Operations in Somalia UNPROFOR – (p) United Nations Protection Force (in former Yugoslavia) UNRISD – (i) United Nations Research Institute for Social Development UNSM – (i) Union of Nova Scotia Municipalities UNTAC – (a) United Nations Transitional Authority in Cambodia UNTAET – (i/a) United Nations Transitional Administration in East Timor UNU – (i) United Nations University
UP UP (s) Ukraine (FIPS 10-4 country code) Union Pacific Railroad (AAR reporting mark) (i) Upper Peninsula (of Michigan) Uttar Pradesh UPC (i) United Pentecostal Church (i) Universal Product Code UPDA – Uganda People's Democratic Army UPdM – (i) Università Popolare della Multimedialità UPDM – Unified Profile for DoDAF/MODAF Unified Modeling Language Profile for DoDAF and MoDAF Unité de psychiatrie du développement mental Universal Pattern Decomposition Method Unix Power Device Management Unpressurized Docking Mast Urban Planning, Design and Management UPF – (i) Universitat Pompeu Fabra (Catalan, "Pompeu Fabra University") UPI – (i) United Press International UPN – (i) United Paramount Network UPS (i) Uninterruptible Power Supply United Parcel Service UPT – Universal Personal Telecommunications UPTN – Upper Peninsula Telehealth Network UPU – (i) Universal Postal Union
UR ur – (s) Urdu language (ISO 639-1 code) UR – (s) Soviet Union (NATO country code, obsolete 1992) URBSFA – (i) Union royale belge des sociétés de football association (French for Royal Belgian Football Association) URC (i) Uganda Railways Corporation United Rugby Championship Utility regulatory commission urd – (s) Urdu language (ISO 639-2 code) URD – (i) User requirements document URI (i) Uniform Resource Identifier University of Rhode Island URL – (a/i) Uniform Resource Locator ("earl") URU – (s) Uruguay (IOC and FIFA trigram, but not ISO 3166) URY – (s) Uruguay (ISO 3166 trigram)
US US – (i) United States (also (s) ISO 3166 and FIPS 10-4 country code digram)
(i) United States of America (also (s) ISO 3166 trigram) United States Army USAF – (i) United States Air Force USAFSPC – (i) U.S. Air Force Space Command USAACE – (p) United States Army Aviation Center of Excellence, Fort Rucker, Alabama USAADAC – (i) United States Army Air Defense Artillery School, Fort Sill, Oklahoma USAAS – (p) United States Army Armor School, Ft. Benning, Georgia USAIC (i) U.S. Army Infantry Center U.S. Army Intelligence Center USAID – (a/i) United States Agency for International Development USAP (a) Union Sportive des Arlequins Perpignanais (i) United States Antarctic Program USAPATRIOT – (i) Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism USAREUR – (p) United States Army Europe USB – (i) Universal Serial Bus USC (i) United States Code University of South Carolina University of Southern California USCG – (i) United States Coast Guard USCINCSPACE – (p) United States Commander in Chief, Space Command USD (s) United States dollar (ISO 4217 currency code) USD(A&S) – (i) Under Secretary of Defense for Acquisition and Sustainment ASD(R&E) Under Secretary of Defense for Research and Engineering USD(C) – (i) (U.S.) Under Secretary of Defense (Comptroller) USDA – (i) United States Department of Agriculture USDI – (i) United States Department of the Interior USDOE – (i) United States Department of Energy USD(I) – Under Secretary of Defense for Intelligence USDPR – (i) (U.S.) Under Secretary of Defense for Personnel and Readiness USDP – (i) (U.S.) Under Secretary of Defense for Policy USDRE – (i) (U.S.) Under Secretary of Defense for Research and Engineering USEC – (a) United States Enrichment Corporation USFL – (i) United States Football League, two different leagues of American football, one operating from 1983–1985 and the second operating in 2022 and 2023 USFWS – (i) United States Fish and Wildlife Service USGS – (i) United States Geological Survey USIA – (i) United States Information Agency USJFCOM – (p) United States Joint Forces Command USL (i) United Soccer League (formerly United Soccer Leagues), a governing body for several lower-level leagues in the United States United Soccer League, the former name of a league operated by the above organization that now plays at the second U.S. level as the USL Championship United Soccer League, a completely different soccer league that operated in 1984 and 1985 University of Southwestern Louisiana, a former name for the school now known as the University of Louisiana at Lafayette USLC – (i) USL Championship USLS – (i) USL Super League (women's soccer league that started play in 2024) USLW (i) USL W-League, a women's soccer league operated by the United Soccer League organization from 1995 to 2015 USL W League, another women's league operated by the same organization that started play in 2022 USMC – (i) United States Marine Corps USMLE – (i) United States Medical Licensing Examination USMNT – (i) United States men's national (soccer) team USN – (i) United States Navy USNA – (i) United States National Arboretum – United States Naval Academy USNB – (i) United States Naval Base USNG – (i) United States National Grid