ISI

ISI may stand for any of the following:

Organizations

*Ice Skating Institute (formerly the Ice Skating Instute of America, or ISIA), the international governing body for recreational skating competitions
*Image Space Incorporated, a video game developer
*Import Substitution Industrialization
*Independent Schools Inspectorate (England)
*Indian Standards Institute, the former name of the Bureau of Indian Standards
*Indian Statistical Institute
*Information Sciences Institute (USC)
*Information Security Institute
*Information Sharing Initiative (US FBI)
*Information Society Initiative
*Innovative Solutions International
*Institut Supérieur d'Informatique
*Institut Seni Indonesia
*Institute for Scientific Information - creator of the Web of Knowledge citation index
*Institute of Scientific Instrumentation in Bangladesh
*Integral Systems, Inc.
*Intercollegiate Studies Institute a conservative non-profit institute headquartered in Wilmington, Delaware, and founded in 1953
*International Safety Instruments, makers of industrial breathing sets and other safety equipment
*International School Ibadan
*International Statistical Institute
*International Students, Inc., a Christian missions agency
*International Students Institute (Japan)
*Inter-Services Intelligence of Pakistan
*Iron and Steel Institute
*Islamic State of Iraq

Others

*Information Sharing Index, the working title of a database in the United Kingdom
*Infrared Spatial Interferometer astronomical interferometer
*Inter-spike Interval in neuroscience; see Temporal coding
*Interstimulus interval
*Intersymbol interference