Unified Compiler Architecture统一编译架构 Upper Control Area高空管制区 Undefinitized Contractual ActionUndefinitized合同的行为 Undefinitized Contract AuthorizationUndefinitized合同的批准 Unified Cryptologic Architecture (NSA)统一Cryptologic建筑 University of Central Arkansas阿肯色州中部大学 Utility Communications Architecture公用通信架构 Use Case Analysis用例分析 Uniform Cost Accounting[经] 统一成本会计 Upper Control Arm上置定位臂 Undercover Agent密探, 特务, 间谍 Uniform Chart of Accounts统一的图表的帐目 Universidad CatÓlica ArgentinaUniversidad CatÓlica Argentina UniversitÀ degli Studi di CagliariUniversitÀ degli Studi di Cagliari Utah Code Annotated犹他州的代码注解