Public Information Officer新闻发布官 Parallel Input/Output并行输入／输出埠口 Public Information Office(美军)新闻处 Programmed Input Output可编程输入输出模式 Process Input Output程序化输入输出 Primaer Immunbrist Organisationen (Sweden)Primaer Immunbrist Organisationen(瑞典) Primary Immunodeficiency Organization主要免疫系统不全症的组织 Private Input Output私人的输入输出 Principal Inspecting Officers (of Railways; United Kingdom)主要考察人员(英国)的铁路 Pilot Involved Oscillation飞行员所涉及的振荡 Programmed Input/Output程序的输入/输出 Pilot Induced Oscillations飞行员诱导振荡 Police Intelligence Operations公安情报的操作 Port Installed Option (automotive)端口安装选项(汽车) Private Industrial Operator (energy market)私人产业经营者(能源市场)