UDP may refer to:

Political parties

Ulster Democratic Party The Ulster Democratic Party (UDP) was a small Ulster loyalism, 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 Ulst ...

, in Northern Ireland * ''União Democrática Popular'' (

Popular Democratic Union (Portugal) The Popular Democratic Union (, , or UDP) is a Marxist political movement in Portugal. The UDP transformed itself into a political association at its 15th congress due to its merger with other left-wing parties in the Left Bloc. History The pa ...

) * ''Unidad Democrática y Popular'' (

Democratic and Popular Union Democratic and Popular Unity Party ( Spanish: ''Unidad Democrática y Popular'') was a Bolivian umbrella political alliance. It existed from 1977 to 1984. It was formed in 1977 by former president Hernán Siles Zuazo and consisted chiefly of Siles ...

), 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 Democrati ...

, multiple organisations

Science and technology

Undecaprenyl phosphate Undecaprenyl phosphate (UP), also known lipid-P, bactoprenol and C55-P., is a molecule with the primary function of trafficking polysaccharides across the cell membrane, largely contributing to the overall structure of the cell wall in Gram-posit ...

, a bacterial cell membrane carrier lipid *

Uridine diphosphate Uridine diphosphate, abbreviated UDP, is an organic compound. 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 important fa ...

, 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 Network packet, packets) to other hosts on an Internet Protoco ...

, a network communications method * User Defined Primitive, a construct in

Verilog Verilog, standardized as IEEE 1364, is a hardware description language (HDL) used to model electronic systems. It is most commonly used in the design and verification of digital circuits, with the highest level of abstraction being at the re ...

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 The universality–diversity paradigm (UDP) is the analysis of biological materials based on the universality and diversity of its fundamental structural elements and functional mechanisms. The analysis of biological systems based on this classifi ...

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 struc ...

, a land use planning system * ''Universidad Diego Portales'' ( Diego Portales University), in Chile {{Disambiguation