(Main list of acronyms and initialisms)
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UA
UB
UC
UD
UE
UF
- UFO - (i) Unidentified Flying Object - United Farmers of Ontario
UG
UH
UI
UJ
- UJTL - (i) Universal Joint Task List
UK
UL
UM
UN
UO
UP
UQ
UR
US
- U.S. - (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 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
- 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)
- 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
- USFWS - (i) United States Fish and Wildlife Service
- USFL - (i) United States Football League
- USGS - (i) United States Geological Survey
- USIA - (i) United States Information Agency
- USJCOM - (p) US Joint Forces Command
- USMC - (i) United States Marine Corps
- 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) 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
UU
UV
UW
UX
- UXO - (p) Unexploded Ordnance
UY
- UY - (s) Uruguay (ISO 3166 and FIPS 10-4 country code digram)
UZ
See also
Lists of abbreviations | Acronyms