Pollution Incident Reporting System污染事件报告体系 Passive Infrared Sensor无源红外传感器 Pulsed Infrared System脉冲红外系统 Personnel Information Reporting System人事信息报告体系 Poslovni Informator Republike Slovenije (Business Directory of Republic of Slovenia)Poslovni Informator Republike Slovenije(商业目录的斯洛文尼亚共和国) Propulsion Information Retrieval System推进信息检索系统 Patent Image Retrieval System专利的图像检索系统 FCC Public Information and Reference ServicesFCC的公共信息和参考咨询服务 plasma immunoreactive secretion(level)血浆免疫反应分泌(水平) Productivity Information Reporting System生产力信息报告体系