Protected Archives Distribution System受保护的档案 Position Azimuth Determining System位置确定系统的方位 Parts And Drawings System部分和图纸系统 Platform Aft Deck Switch平台甲板后部开关 Programmer's Advanced Debugging System程序员的先进的调试系统 Penetration Aids Deployment System渗透艾滋病部署系统 Parametric Airborne Dipping Sonar参数空降浸渍声纳 People And Dogs Society (UK Charity)英国人与狗社会慈善 Pacific Assistance Dogs Society (British Columbia)太平洋援助的狗协会(英属哥伦比亚) Parti AlgÉrien pour la DÉmocratie et le Socialisme (Algerian Party for Democracy and Socialism)Parti AlgÉrien pour la DÉmocratie et le Socialisme (Algerian Party for Democracy and Socialism) Planned Arrival & Departure System计划到达和离开系统 Price & Availability Data Sheet价格和可用性数据表 PPPoE (Point-to-Point Protocol Over Ethernet) Active Discovery Session-Confirmation点对点协定在以太网PPPoE(发现)积极Session-Confirmation Pen Application Development System应用发展体系。钢笔 Passenger Airbag Disarm Switch (automotive)乘客安全气囊解除开关(汽车)