Undefinitized Contract ActionUndefinitized合同的行为 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