# List of acronyms: U

This list contains acronyms, initialisms, and pseudo-blends that begin with the letter U.
For the purposes of this list:
* acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
* initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
* pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
    (a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
    (i) = initialism, e.g.: CD – (i) compact disc
    (p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
    (s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – megahertz)
Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.
(Main list of acronyms)

## Contents

* Top
* U0–9 UA UB UC UD UE UF UG UH UI UJ UK UL UM UN UO UP UQ UR US UT UU UV UW UX UY UZ
* 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)
* 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)
* USA
** (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 having started play in 2022
* 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 starting 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

## 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

* UW – (i) University of Washington
* UWO – (i) University of Western Ontario
* UWW – (i) United World Wrestling

## 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)