UDB may refer to: __NOTOC__ Computing Universal Data Bank, the original name of UDB CORPORATION Universal Database, the original name of the IBM Db2 database Universal Desktop Box, a line of desktop computers originally named DEC Multia User database, for T9 predictive text Ultimate Doom Builder, the level/script editor for the first-person shooter Doom and its derivatives. Undo debugger, a form of Time travel debugging

Politics Bolivian Democratic Union (), a former right-wing political party in Bolivia Breton Democratic Union (Union Démocratique Bretonne), the main Breton autonomist political party Belgian Democratic Union (Union Démocratique Belge), a short-lived Belgian political party after the Second World War Unión del Barrio (Union of Neighbors)

Other uses Dakar Bourguiba University () in Dakar, Senegal Universidad Don Bosco, a university in El Salvador Urbancorp Development Bank, a subsidiary of Urban Bank, Philippines

See also Uganda Development Bank Limited (UDBL), a development financial institution, owned by the Government of Uganda Uprava državne bezbednosti (UDBA), the secret police organization of the Socialist Federal Republic of Yugoslavia