ISI

ISI is an acronym that can refer to several organizations and entities across different fields and regions. This article outlines the most common uses.

Inter-Services Intelligence (ISI) is Pakistan’s premier intelligence agency. It is responsible for national security, foreign intelligence, and various covert operations. Established in 1948, ISI operates under civilian government oversight and military leadership and is headquartered in Islamabad. It has played a central role in regional security dynamics and intelligence activities.

Indian Statistical Institute (ISI) is a public research institute devoted to statistics, mathematics, and computer science. Founded in 1931 in Calcutta (Kolkata), it is renowned for contributions to statistics and analytics and maintains campuses in Kolkata and Bengaluru (Bangalore), along with various research centers and programs.

Institute for Scientific Information (ISI) was a pioneering provider of bibliographic and citation databases. It produced the Science Citation Index and related resources, and its information products influenced bibliometrics and research evaluation. The unit became part of Thomson Reuters and later Clarivate Analytics, continuing to influence modern citation indexing and analytics.

International Statistical Institute (ISI) is a global professional association of statisticians. Founded in 1885, it promotes the development and application of statistics, publishes scholarly journals, and organizes events such as the World Statistics Congress to foster international collaboration.

Information Sciences Institute (ISI) is a research institute affiliated with the University of Southern California in Marina del Rey, California. It conducts advanced research in computer science, artificial intelligence, machine learning, cybersecurity, and related disciplines, often collaborating with government and industry partners.