1. Political parties

2. Science and technology

3. Other

UPD may refer to:

Political parties

• Union for Development, a political party in Macao
• Union for Peace and Development, a political party in Burundi
• Union, Progress and Democracy, a political party in Spain

Science and technology

• Underpotential deposition, electrodeposition of a metal
• Uniparental disomy, chromosomal abnormality
• HP Universal Print Driver, LaserJet print driver by Hewlett-Packard

Other

• Unified Police Department of Greater Salt Lake
• Urban planned development, a governmental designation for an urban village-style planned community
• University of the Philippines Diliman, the flagship university of the University of the Philippines System
• University Police Department, on-campus police force at a university

• Clifford Salmond
• Clifford Saville
• Clifford Schellenberg
• Clifford Scott
• Clifford Scott (disambiguation)
• Clifford Scott High School
• Clifford Scott (musician)
• Clifford Sefton
• Clifford Seymour Gymnasium
• Clifford Shirley
• Clifford Skakle
• Clifford Solomon
• Clifford Sproule
• Clifford, Stephen
• Clifford, Steve
• Clifford the Big Red Dog (1988 series)
• Clifford, Thomas
• Clifford Trow
• Clifford Truesdell III
• Clifford University
• Clifford Vaughs
• Clifford Victor Johnson
• Clifford V. Smith, Jr.
• Clifford v. Trump
• Clifford, Walter