English abbreviations from ucsc to ud
- UCSC (University of California at Santa Cruz)
- UCSD (University of California, San Diego)
- UCSF (University of California at San Fracisco)
- UCSJ (Union of Councils for Jews in the Former Soviet Union)
- UCSR (Unit Control Supply Rate)
- UCSU (Upstream Commissioning and Start-Up)
- UCSUT (Universalist Church School Union Trust)
- UCT (Ukhta Airport)
- UCTD (University Center for Training & Development (Binghamton University))
- UCTE (Union for the Coordination of the Transport of Electricity, the power transmission system of continental Europe)
- UCU (UCCF (Universities and Colleges Christian Fellowship) Christian Union)
- UCV (Universidad Católica de Valparaíso)
- UCVP (Universal Combat Vehicle Platform)
- UCW (Union Culturelle Wallonne)
- UCX (Unemployment Compensation for Ex-Servicemembers)
- UCY (Everett-Stewart Airport)
- UD (Unanimous Decision)