Editing ISI (section)

==Organizations==
* [[Intercollegiate Studies Institute]], a classical conservative organization focusing on college students
* [[Ice Skating Institute]], a trade association for ice rinks
* [[Indian Standards Institute]], former name of the national standards body of India, the Bureau of Indian Standards
** [[ISI mark]], a product certification mark in India
* [[Institute for Scientific Information]], part of Clarivate Analytics (formerly the Healthcare & Science business of the Thomson Reuters Corporation)
* [[Institute for Scientific Interchange]], a theoretical scientific research centre based in Turin, Italy
* [[Inter-Services Intelligence]], an intelligence agency of Pakistan
* [[International Statistical Institute]], a professional association of statisticians
* International Systems Institute, a scientific and educational corporation founded by [[Béla H. Bánáthy#International Systems Institute|Béla H. Bánáthy]]
* [[Iron and Steel Institute]], precedent organization to the Institute of Materials, Minerals and Mining
* [[Islamic State of Iraq]], an umbrella organization of a number of Iraqi insurgency groups
* [[Integral Satcom Initiative]], the European Technology Platform on Satellite Communications
* [[Independent  Schools Inspectorate]], responsible for the inspection of independent schools and private further education colleges in England
* [[Integrated Systems, Inc.]], a former developer of real-time operating systems
* [[Image Space Incorporated]], an independent video game developer
* [[ImageSat International]], an Israeli satellite imagery company

===Schools and educational institutions===
* [[Indian Statistical Institute]], a public research institute and university in Baranagar, Kolkata, India
* Indonesian Institute of the Arts, a collective name of arts university in Indonesia:
** [[Indonesian Institute of the Arts, Denpasar]]
** [[Indonesian Institute of the Arts, Surakarta]]
** [[Indonesian Institute of the Arts, Yogyakarta]]
* [[Information Sciences Institute]], a research and development unit of the University of Southern California's Viterbi School of Engineering
* Institute of Scientific Instrumentation, a subsidiary of the Bangladesh [[University Grants Commission (Bangladesh)|University Grants Commission]]
* [[Intercollegiate Studies Institute]], a non-profit educational organization
* [[International School Ibadan]], a school located on the Campus of the University of Ibadan
* [[International School of Iceland]], a school located in Garðabær, Iceland, a suburb of the capital city of Reykjavík
* [[Islamic School of Irving]], in the Dallas-Fort Worth area