List of acronyms: U

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(Main list of acronyms)

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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 [http://www.data-archive.ac.uk]
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)
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(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
USNH – (i) United States Naval Hospital
USNI – (i) United States Naval Institute
USNO – (i) U.S. Naval Observatory
USNOFS – (i) United States Naval Observatory Flagstaff Station
USNP – (i) United States Newspaper Program
USNR – (i) United States Navy Reserve
USNS – (i) United States Naval Ship
USNY – (a) University of the State of New York (usually pronounced "use-knee")
USNZ – (i) University Sport New Zealand
USP – (i) Unique Selling Point
USPS – (i) United States Postal Service
USPTO – (i) United States Patent and Trademark Office
USR
(a) Universal System Resources (/usr, directory in a *NIX filesystem)
(s) User
USS – (i) United States ship (sometimes meaningless, see Star Trek)
USSPACECOM – (p) United States Space Command
USSR – (i) Union of Soviet Socialist Republics
UST – (i) Underground Storage Tank
USTRANSCOM – (p) United States Transportation Command
USWNT – (i) United States women's national (soccer) team

UT

UT – (i) Universal Time
UTEP – (a/i) University of Texas at El Paso (pronounced you-tep)
UTM – (i) Universal Transverse Mercator (geographical co-ordinate system)
UTRGV – (i) University of Texas Rio Grande Valley
UTSA – (i) University of Texas at San Antonio

UU

UU – (i) Unitarian Universalism – University of Utah – Unseen University
UUA – (i) Unitarian Universalist Association
UUID – (i) Universally Unique Identifier (see also GUID)
UUV – (i) Unmanned Underwater Vehicle

UV

UV – (s) Burkina Faso (FIPS 10-4 country code; from Upper Volta) – (p) ultraviolet
UVM
(i) Universal Verification Methodology
(i) Universidad del Valle de México
(i) University of Vermont, from its Latin name of Universitas Viridis Montis ("University of the Green Mountains")
(i) UV mapping

UW

UX

UXO – (p) Unexploded ordnance

UY

UY – (s) Uruguay (ISO 3166 and FIPS 10-4 country code digram)--Up yours
UYU – (s) Uruguayan peso uruguayo (ISO 4217 currency code)

UZ

uz – (s) Uzbek language (ISO 639-1 code)
UZ – (s) Uzbekistan (ISO 3166 and FIPS 10-4 country code digram)
uzb – (s) Uzbek language (ISO 639-2 code)
UZB – (s) Uzbekistan (ISO 3166 trigram)
UZS – (s) Uzbek soum (ISO 4217 currency code)

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