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)

(Main list of acronyms)

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) University of Alabama at Birmingham
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

UBC
*(i) United Baptist Church
* University of British Columbia
UBIGEO – (i) Ubicación Geografica (Spanish for Geographical Location)
UBA – Unbundled Bitstream Access
UBS – Union Bank of Switzerland

UC

UCBSA – (i) United Cricket Board of South Africa
UCAV – (a/i) Unmanned Combat Air Vehicle
UCF – (i) University of Central Florida
UCI – (i) Union Cycliste Internationale (French, "International Cycling Union") – University of California, Irvine
UÇK – (i) initialism for two Albanian guerilla movements
UCLA – (i) University of California, Los Angeles
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 at 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 at Urbana-Champaign

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) – University of Kentucky
UKDA United Kingdom Data Archive
UKIP - (a) United Kingdom 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)
UMBC – (i) University of Maryland, Baltimore County
UMC – (i) United Microelectronics Corporation – University of Missouri–Columbia
UMCP – (i) Unit Maintenance Collection Point
UMES – (i) University of Maryland Eastern Shore
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
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)
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)
United States
- (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
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, a third-level U.S. league, not to be confused with an earlier league of the same name.
- United Soccer Leagues, the organization that operates the above league, plus several other lower-level leagues
- University of Southwestern Louisiana, a former name for the school now known as the University of Louisiana at Lafayette
USMC – (i) United States Marine Corps
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
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)

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)
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 som (ISO 4217 currency code)

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