UA

UA, U-A, Ua, uA, or ua may refer to:

Arts and entertainment

Uitgesloten aansprakelijkheid (lit. 'excluded liability'), a Dutch form of cooperative, which has legal personality, but with members (at least two on incorporation) rather than shareholders, with no capital and therefore no minimum capital or equity requirement, and with articles of association that can be worded such that members are not liable for the actions performed by the Cooperative (or losses suffered), usually used as a holding or finance company
ultrAslan, a fan group of the Galatasaray Spor Kulübü football team
Under Armour, an American clothing brand
Union Association, a baseball league of 1884
United Airlines, a major American airline headquartered in Chicago, Illinois (whose IATA airline designator is also UA)
United Artists, a film studio
United Association, a plumbing and pipefitting labor union in the U.S. and Canada
Universal Audio (company), a designer and manufacturer of audio signal processing hardware and software
University Alliance, a lobbying group of British universities
UP Aerospace, a private spaceflight company based in Denver, Colorado

German submarine UA, a German submarine of the Second World War
German Type UA submarine, of the First World War
SM UA, a World War I submarine of Imperial Germany
Unauthorized Absence, a key term for the abandonment of a duty or post without permission (United States)
Future Force Unit of Action, a proposed US Army tactical unit

University of Akron, a public research university in Akron, Ohio, United States
University of Alabama, a public research university located in Tuscaloosa, Alabama, United States
University of Alaska system, a university system in Alaska created in 1975

University of Alaska Anchorage, the largest university by enrollment in the system
University of Alaska Fairbanks, the first university and flagship (known from 1925 to 1975 simply as the University of Alaska)
University of Alaska Southeast, located in the capital city of Juneau, and the smallest by enrollment

University of Alicante, a public university in Alicante, Spain
University of Antwerp, one of the major Belgian universities located in the city of Antwerp
University of Arizona, a public research university in Tucson, Arizona, United States
University of Arkansas, a public, co-educational, land-grant, space-grant, research university in Fayetteville, Arkansas, United States

.ua, the Internet country code top-level domain (ccTLD) for Ukraine
User agent, a computer networking software class
User Assistance, computer programme manuals and documentation
Universal Acceptance, a term to represent the principle that accepts all the email addresses with every Top-level domain (TLD).
OPC Unified Architecture, a protocol used in industry 4.0 for inter machine communication

Unmanned aircraft or unmanned aerial vehicle (UAV), an aircraft without a human pilot aboard (commonly known as a drone)
Microampere (uA, properly µA), a unit of electric current defined as one-millionth of an ampere
UA, the product of a heat exchanger's Overall Heat Transfer Coefficient U and its active exchange area A in thermodynamics

Unit of account, a nominal monetary unit of measure or currency used to represent the real value (or cost) of any economic item (in economics), or the words that are used to describe the specific assets and liabilities that are reported in financial statements rather than the units used to measure them (in financial accounting)
Unitary authority, a type of local authority that has a single tier and is responsible for all local government functions within its area, or performs additional functions which elsewhere in the relevant country are usually performed by national government or a higher level of sub-national government
Urban area, a human settlement with high population density and infrastructure of built environment