U
- UAE: United Arab Emirates
- UAV: Unmanned Aerial Vehicle
- UF: United Front
- UFO: Unidentified Flying Object
- UGC: University Grants Commission
- ULFA: United Liberation Front of Assam
- UN: United Nations
- UNCTAD: United Nations Conference on Trade and Development
- UNCTAD: United Nations Conference on Trade and Development
- UNCTAD: United Nations Conference on Trade and Development
- UPA: United Progressive Alliance
- UPSC: Union Public Service Commission
- UPTN: Universal Personal Telephone Number
- USA: United States of America
- USIS: United States Information Service