UCA
- Bethany Academy
- Clermont Auvergne University
- Oneida County Airport
- Pontifical Catholic University of Argentina
- Uca
- Under color addition
- Unicode collation algorithm
- Unitarian Christian Association
- Uniting Church in Australia
- Universal College Application
- Universalist Church of America
- Universidad Centroamericana (Managua)
- Universidad Centroamericana (San Salvador)
- University for the Creative Arts
- University of California
- University of Central Arkansas
- University of Central Asia
- University of Cádiz
- Upper Columbia Academy
- Urgent Care Association