Universal Licensing System通用许可证制度 Use Less Stuff使用更少的东西 Universal Learning System (artificial intelligence)普遍的学习系统(人工智能) Up-Link Station (Galileo System)Up-Link站(伽利略系统) Update of Legacy Systems系统升级 User Level Security用户级安全性 User Location Service用户位置服务 Ultra-Large-Scale SystemsUltra-Large-Scale系统 Ultimate Limit State (British steelwork standard)极限状态(英国钢铁厂标准) Universal Load Simulator环球负荷模拟器 Upper Limit Switch高限开关 Unbundled Local Switching (FCC)本地交换(FCC绑定) University of Liggett School对大学上学 Upward-Looking SONARUpward-Looking声纳 Unit Level Switch单位层交换机