ISI

ISI or Isi may refer to:

• İsi, a village and municipality in the Masally Rayon of Azerbaijan
• ContactPoint (previously Information Sharing Index), a government database that held information on all children under 18 in England
• Ice Skating Institute, a trade association for ice rinks
• Image Space Incorporated, an Independent video game developer
• Import substitution industrialization, a trade and economic policy
• 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
• ISI mark, a product certification mark in India