Physical Delivery Service实物投递业务 Public Domain Software公用领域软件 PÅlitelighet og tilgjengelighet av Datamaskinbaserte Sikringssystemer (Norwegian: Reliability and Availability of Computerized Safety Systems)Palitelighet tilgjengelighet av Datamaskinbaserte噩Sikringssystemer(挪威:可靠性和有效性的计算机安全系统) Professional Development Scheme (UK)(英国)的专业发展方案 IEEE Transactions on Parallel and Distributed SystemsIEEE交易和并行分布式系统 Project Design Specifications工程设计规范 Portable Document Software可携式文件软件 Premises Distribution Systemn建筑物结构化综合布线系统 Production Data Set生产的数据集 Paintball Detection System彩弹侦测系统 Project Drafting Specification工程制图的规格 Post Delivery Support邮政交货的支持 Packet Driver Specification包驱动的规格 Pallet Design System托盘设计系统 Product Development System (PTC)产品开发系统(PTC)