University of Durham, a university in the United Kingdom

University of Delaware, a university in the United States

University of Dallas, a Catholic university in Texas

Ud, a Turkish instrument

University of Dubuque, a Presbyterian university in Iowa

University of Dayton, a university in Ohio

University of Dublin, a university in the Republic of Ireland

Undead, particularly undead in the Warcraft universe

Upper Deck, a manufacturer of collectibles and trading cards

UD is a Japanese truck manufacturer. UD may refer to:

Urban Dead, a massively multiplayer online role-playing game

United Devices, a commercial distributed computing company that focuses on CPU scavenging and enterprise cluster management

Urban Dictionary, an online reference for slang terminology

Utenriksdepartementet, the Norwegian Ministry of Foreign Affairs

Utrikesdepartementet, the Swedish Ministry of Foreign Affairs

Hex'Air's IATA airline designator

United Distillers, a whiskey holding company