Infrared Information System红外信息系统 Internal Revenue Information System国内税收信息系统 Imaging, Robotics, and Intelligent Systems laboratory (University of Tennessee)成像、机器人、和智能化系统实验室(田纳西大学) Incorporated Research Institutions for Seismology对于地震学研究机构成立 Infrared Interferometer Spectrometer红外干涉分光计 Integrated platform for Regional Information System地区信息系统用综合平台 Instructional Resources Information System教学资源信息系统 Integrated Registration Information System (Hong Kong)综合注册信息系统(香港) Integrated Resource Infrastructure Solutions整合资源基础设施的解决方案 Illinois Researcher Information Service (University of Illinois Library at Urbana-Champaign)伊利诺斯州的研究信息服务(伊利诺伊大学图书馆刘昌) Inarihan River Irrigation System (Philippines)Inarihan河流灌溉系统(菲律宾) Instant Response Information Service (Toshiba support knowledgebase)即时回应信息服务(东芝支持知识库) Infrared Information Symposium红外信息研讨会 Immuno-Deficience Primitive: Recherche, Information, SoutienImmuno-Deficience原始:是一个、信息、Soutien Interactive Retail Information System交互式零售信息系统