| Acronym | Definition |
|---|
| UDC | USB (Universal Serial Bus) Device Controller |
| UDC | Universidade da Coruña (Spain) |
| UDC | Union Democratique du Centre (Swiss People's Party) |
| UDC | University of the District of Columbia |
| UDC | Universal Decimal Classification |
| UDC | United Daughters of the Confederacy |
| UDC | Urban Development Corporation |
| UDC | Unified Development Code |
| UDC | Urban District Council (UK) |
| UDC | Utility Data Center (HP) |
| UDC | Unió Democrática de Catalunya (Democratic Union of Catalonia, Spain) |
| UDC | Universal Display Corporation |
| UDC | United Development Company |
| UDC | Utility Distribution Company |
| UDC | Uniform Distribution Center (Us Coast Guard Unit) |
| UDC | Unione Dei Democratici Cristiani e di Centro (Italian political party) |
| UDC | United Doberman Club |
| UDC | Cameroonian Democratic Union |
| UDC | Uniun Democratica Dal Center (Swiss People's Party) |
| UDC | Utah Department of Corrections |
| UDC | Usage Data Collector (Eclipse) |
| UDC | User-Defined Command |
| UDC | Universal Digital Controller (Honeywell) |
| UDC | Universal Digital Channel |
| UDC | unit descriptor code (US DoD) |
| UDC | Unit Disciplinary Committee (Federal Bureau of Prisons) |
| UDC | Universal Database Connectivity |
| UDC | Uniao Democrata-Crista de Timor (Christian Democratic Union of Timor) |
| UDC | Uniform Definition of a Child (tax law) |
| UDC | Under-Developed Country |
| UDC | User Defined Collection |
| UDC | User Driven Content |
| UDC | User-Definable Commands |
| UDC | Undated Circular Cancel (philately) |
| UDC | Universal Data Connectivity |
| UDC | Unicycle Dot Com |
| UDC | Un-reimbursed Development Cost |
| UDC | Unlawful Discrimination Claim (IRS code) |
| UDC | Utopia Diplomat Corps (Swirve's Utopia game) |
| UDC | Unclassified Document Control |
| UDC | Uniform Directional Coupler |
| UDC | Universal Data Channel |
| UDC | Unión Democrática del Camerún (Spanish) |
| UDC | User Designation Code |
| UDC | Unit Desk Clerk (medical) |
| UDC | Unit Deployment Center |