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 a series of constituent letters, e.g., SARS = severe acute respiratory syndrome
- initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc
- pseudo-blend = an abbreviation whose extra or omitted letters means that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
- (a) = acronym in the example: SARS - (a) Severe acute respiratory syndrome
- (i) = initialism in the example: CD - (i) Compact disc
- (p) = pseudo-blend in the example: UNIFEM - (p) United Nations Development Fund for Women
- (s) = symbol (none of the above, representing and pronounced as something else; for example: MHz - Megahertz)
Add new entries here or in the sub-pages
Please add your own entries, in this page or in the appropriate sub-page. Use a quasi-dictionary order, with lowercase treated the same as uppercase and ignoring non-alphanumeric characters (hyphens and such). This means that only alphanumeric characters have any significance in determining order, and that lowercase letters occupy the same ordering position as uppercase (in tie-breaker cases, list lower case first). For example: Ka appears before KA. (This differs from a strict ASCII ordering.)
(Main list of acronyms and initialisms)
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 |
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- U - (s) Uranium
UA
- UA - (s) Ukraine (ISO 3166 digram) (i) Unit of Action
- UAB - (i) University of Alabama at Birmingham
- UAE - (i) United Arab Emirates
- UAH – (s) Ukrainian hryvnia (ISO 4217 currency code) - (i) University of Alabama in Huntsville
- UAR - (i) Uniformly At Random (probability) - United Arab Republic - Unión Argentina de Rugby (Spanish for "Argentine Rugby Union")
- UAV - (i) Unmanned Aerial Vehicle - Unprotected Anal and Vaginal sex
UB
- UBC - (i) United Baptist Church - University of British Columbia
- UBIGEO - (i) Ubicación Geografica (Spanish for Geographical Location)
- UBS - (i) Unbundled Bitstream Services - United Bank of Switzerland - United Banque Suisse
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
- 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
- UHRB - (i) Ultra-High Resolution Building (simulation)
UI
- UIC - (i) University of Illinois at Chicago
- UID - (i) User ID
- uig - (s) Uyghur language (ISO 639-2 code)
- UIUC - (i) University of Illinois at Urbana-Champaign
UJ
UK
- uk - (s) Ukrainian language (ISO 639-1 code)
- UK - (i) United Kingdom (also (s) FIPS 10-4 country code) - University of Kentucky
- 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
UM
- UM - (s) U.S. 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) U.S. 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
- 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 Geographic Names
- UNHCR - (i) United Nations High Commission(er) 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
- UNIS - (p) University of Surrey, Guildford, England
- 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 Scotian Municipalities
- UNTAC - (a) United Nations Transitional Authority in Cambodia
- UNTAET - (i/a) United Nations Transitional Administration in East Timor
- UNU - (i) United Nations University
UNICEF- Unreliable Naturalists in California, Ecuador and Finland
UP
- UP - (s) Ukraine (FIPS 10-4 country code) - (i) Uttar Pradesh
- UPC - (i) United Pentecostal Church
- UPC - (i) Universal Product Code
- UPdM - (i) Università Popolare della Multimedialità
- UPDM - (i) Uganda People’s Democratic Movement - 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
- UPTN - (i) Universal Personal Telecommunications Number - 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)
- 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")
- 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
- USAADAC - (i) U.S. Army Air Defense Artillery Center, Fort Bliss, TX
- USAARMC - (p) U.S. Army ARMor Center, Fort Knox, KY
- USAAVNC - (p) U.S. Army AViatioN Center, Fort Rucker, AL
- USAF - (i) United States Air Force
- USAFSPC - (i) U.S. Air Force Space Command
- 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 Arlequins Perpignan
- 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 - (i) (U.S.) Under-Secretary of Defense - (s) U.S. dollar (ISO 4217 currency code)
- USD(A&T) - (i) (U.S.) Under-Secretary of Defense (Acquisition and Technology)
- USD(AT&L) - (i) (U.S.) Under-Secretary of Defense for Acquisition, Technology, and Logistics
- 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(P) - (i) (U.S.) Under-Secretary of Defense (Policy)
- USD(P&R) - (i) (U.S.) Under-Secretary of Defense (Personnel & Readiness)
- USDRE - (i) (U.S.) Under-Secretary of Defense for Research and Engineering (1978–1986)
- 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
- USMC - (i) United States Marine Corps
- United States Navy - (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) U.S. 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
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
- Uub - (s) Ununbium (temporary superheavy chemical element name)
- 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
UW
- UW - (i) University of Washington
- UWO - (i) University of Western Ontario
- UWT - (i) Under Water Telephone
- UWTG - (p) Under Water Tug
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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