# ISI

ISI or Isi may refer to:

## 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
* 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
* 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

## Science and technology

* Information Sharing Index, former name of ContactPoint, a government database that held information on all children in England
* Infrared Spatial Interferometer, an astronomical interferometer array of three telescopes
* Interstimulus interval, the temporal interval between the offset of one stimulus to the onset of another
* Intersymbol interference, a form of distortion of a signal in which one symbol interferes with subsequent symbols
* Instruction Storage Interrupt, Segmentation fault of a PowerPC
* In-service inspection

## Other uses

* Isi (name), personal name, sometimes an abbreviation of various other names
* "Isi" (song), 1975 track by Neu! from the album Neu! '75
* İsi, a village and municipality in Azerbaijan
* Import substitution industrialization, a trade and economic policy