UDP may refer to:

Political parties

Ulster Democratic Party The Ulster Democratic Party (UDP) was a small loyalist political party in Northern Ireland. It was established in June 1981 as the Ulster Loyalist Democratic Party by the Ulster Defence Association (UDA), to replace the New Ulster Political Res ...

, in Northern Ireland * ''União Democrática Popular'' ( People's Democratic Union (Portugal)) * ''Unidad Democrática y Popular'' (

Democratic and Popular Union The Democratic and Popular Union (Spanish: ''Unidad Democrática y Popular'') (1977–84) was a Bolivian umbrella political alliance uniting various smaller left-wing parties. It was formed in 1977 by former president Hernán Siles Zuazo and cons ...

), a former Bolivian umbrella party *

United Democratic Party (disambiguation) United Democratic Party may refer to: *United Democratic Party (Belize) *United Democratic Party (British Guiana) *United Democratic Party (Cayman Islands) *United Democratic Party (The Gambia) *United Democratic Party (Kenya) *United Democratic Pa ...

, multiple organisations

Science and technology

* Undecaprenyl phosphate, a bacterial cell membrane carrier lipid *

Uridine diphosphate Uridine diphosphate, abbreviated UDP, is a nucleotide diphosphate. It is an ester of pyrophosphoric acid with the nucleoside uridine. UDP consists of the pyrophosphate group, the pentose sugar ribose, and the nucleobase uracil. UDP is an im ...

, an organic chemical *

User Datagram Protocol In computer networking, the User Datagram Protocol (UDP) is one of the core communication protocols of the Internet protocol suite used to send messages (transported as datagrams in packets) to other hosts on an Internet Protocol (IP) network ...

, a network communications method *

Usenet Death Penalty On Usenet, the Usenet Death Penalty (UDP) is a final penalty that may be issued against Internet service providers or single users who produce too much spam or fail to adhere to Usenet standards. It is named after the death penalty (the state-sanc ...

, a discussion group disciplinary response * Universality-diversity paradigm

Other uses

Unit Deployment Program The Unit Deployment Program (UDP) is a system for assigning deployments of the United States Marine Corps. To reduce the number of unaccompanied tours and improve unit continuity, the Commandant of the Marine Corps, (CMC) established it to provide ...

, a military assignment system *

Unitary development plan In United Kingdom planning law, a unitary development plan (UDP) is a development plan prepared by a metropolitan district, London Borough or some unitary local authorities. Background UDPs contains policies equivalent to those in both a str ...

, a land use planning system * ''Universidad Diego Portales'' (

Diego Portales University Diego Portales University ( es, Universidad Diego Portales, UDP) is one of the first private universities founded in Chile and is named after the Chilean statesman Diego Portales. UDP has campuses in the Barrio Universitario de SantiagoA litera ...

), in Chile {{disambiguation