PA Program Access 程序存取
PA Product Analysis 产品分析
PA Press Association, Ltd 报纸联合社[英]
PA Press Agent 新闻广告员，报刊宣传员
PA Picoampere 皮安
PA Program Aid 《程序工具》[美]
PA Presidents Association 会长协会
PA Pattern Analysis 样品分析
PFA Predictive Fault Analyzer 预测故障分析仪
PB Peripheral Buffer 外围缓冲器
PB Perspectives in Business 《商业展望》[美]
PB Pharmacopoeia Britannica 《英国药典》
PA Parametric Amplifier 参量放大器
PB Plug Board 插板，转接板
PB Publication Board 出版局
PB Publications Bulletin 出版物[文献]公报
PC Patrol Car 巡逻车
PC Punched Card 穿孔卡片
PC Pulse Counter 脉冲计数器