UAC

UAC may refer to:

Computing

 * User Account Control, a security feature in Microsoft Windows
 * Session Initiation Protocol client

Organizations

 * Ulster Army Council, 1973 Northern Ireland loyalist paramilitary group
 * Undeb Amaethwyr Cymru, the Farmer's Union of Wales
 * Unemployment Action Center, a non-profit organization in New York City, US
 * United Apostolic Church
 * Union of Catholic Apostolate
 * Université d’Abomey-Calavi, part of the National University of Benin
 * United Africa Company, 20th-century British company
 * United Africa Company of Nigeria, formerly a subsidiary of United Africa Company
 * United Aircraft Corporation, Russian aerospace and defense company
 * United Arab Command, of the Arab League
 * United Athletic Conference, an American college football conference that started play in 2023
 * Universidad Andina del Cusco, Peru
 * Universities Admissions Centre, Australia
 * Urban Appalachian Council, Cincinnati, US

Other

 * Unaccompanied Alien Children, United States government classification for children in immigration custody
 * Unified Arab Code, a Civil Code produced by the Arab League between 1988 and 1996
 * Urban adult contemporary, radio music format
 * Union Aerospace Corporation, fictional military contractor in the Doom video game franchise
 * UAC, a codon for the amino acid tyrosine