PO

= Parity Odd,奇校验;

= Planning Objective, 计划目标;

= POlarity, 极性;

= Power On, 加电，通电;

= Power Oscillator, 功率振荡器;

= Power Output, 功率输出;

= Primary Output, 初级输出;

= Primary Output, 主输出;

= Prodution Order, 生产指令