UAP
- Tour UAP
- Unidentified Aerial (or Anomalous) Phenomenon
- Uniform access principle
- United American Patriots
- United Architects of the Philippines
- United Australia Party
- United Australia Party (2013)
- Universidad Adventista del Plata
- Universidad Alas Peruanas
- University of Agriculture, Peshawar
- University of Alabama Press
- University of Asia Pacific
- University of Asia and the Pacific
- Unlicensed assistive personnel
- Ununited anconeal process
- Urban Art Projects
- User Account Protection
- User Agent Profiling
- Yap