The Indian Statistical Institute (ISI) is a unique institution devoted to the research, teaching and application of mathematics, statistics, natural sciences and social sciences. Founded by Professor P.C. Mahalanobis in Kolkata on December 17, 1931, the institute gained the status of an Institution of National Importance by an Act of Parliament in 1959.

The headquarters of the ISI is on the northern fringe of Kolkata. There are four centres located in Delhi, Bangalore, Chennai and Tezpur. Research in Statistics and related disciplines is the institute's primary activity. Teaching activities are undertaken mainly in the Kolkata, Delhi, Bangalore, Chennai and Tezpur centres. Offices of the Institute located in several other cities in India are primarily engaged in projects and consultancy in Statistical Quality Control and Operations Research.

The academic programmes at the institute include Bachelor (and Master) of Statistics (Hons.), Bachelor (and Master) of Mathematics (Hons.), Masters in Quantitative Economics, Masters in Library and Information Science, Master of Technology in Computer Science and in Quality, Reliability and Operations Research. The ISI also has a research fellow programme where eligible research fellows are awarded the Ph.D. degree.

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