| Acronym | Definition |
|---|
| UCA | University of Central Arkansas |
| UCA | Universidad de Cádiz (Spain) |
| UCA | Universidad Católica Argentina |
| UCA | Universal Common Ancestry (evolutionary theory) |
| UCA | Uniting Church in Australia |
| UCA | Universal Cheerleaders Association |
| UCA | University for the Creative Arts (UK) |
| UCA | Unicode Collation Algorithm |
| UCA | Upper Control Arm |
| UCA | United Computer Accessories |
| UCA | Under Color Addition |
| UCA | Unicast Address |
| UCA | United Computer Associates |
| UCA | University of Central Asia |
| UCA | Urban Conservation Area (various locations) |
| UCA | University of Central America |
| UCA | Undefinitized Contract Action |
| UCA | Utility Communications Architecture |
| UCA | Undercover Agent |
| UCA | Utah Code Annotated |
| UCA | Uniform Credit Analysis |
| UCA | Union Collective Agreement |
| UCA | Ultrasound Contrast Agent (imaging) |
| UCA | Uniform Circular Array |
| UCA | Undefinitized Contractual Action |
| UCA | Unauthorized Computer Access (Japan) |
| UCA | Uniform Chart of Accounts |
| UCA | United Colonial Army (Killzone) |
| UCA | Università degli Studi di Cagliari |
| UCA | Utica, NY, USA - Oneida County (Airport Code) |
| UCA | Unit Climate Assessment (USAF) |
| UCA | Unsupported Credit Approval (UK) |
| UCA | Unified Cryptologic Architecture (NSA) |
| UCA | Undefinitized Contract Authorization |
| UCA | Unternehmer Consult Ag (Munich, Germany) |
| UCA | Use Case Analysis |
| UCA | Union des Conservateurs d'Aquariums (French: Union of Aquarium Conservators) |
| UCA | Unit Career Advisor |
| UCA | Uganda Co-Operative Alliance Limited |
| UCA | Ultraclean Air |
| UCA | University Cheerleaders Association |
| UCA | U-matic Cassette Application |
| UCA | Uxbridge Conservation Association (Canada) |
| UCA | User Computer Address |
| UCA | Uniform Cost Accounting |
| UCA | University Counselling Association |
| UCA | Under Construction Always |
| UCA | Unpriced Contract Action (USACE) |
| UCA | Upper Close Auxiliary |