ORSI stands for Operational Research Society of India.

The Bangalore Chapter of the Operational Research Society of India (ORSI), founded by late Prof. B.G. Raghavendra, started functioning at the Department of Management Studies, Indian Institute of Science, Bangalore from August 31, 1988. Based on the minutes of 2019 ORSI Central Council Meeting and the 2019-AGM held at Ahmedabad during Dec. 2019, the ORSI Bangalore Chapter registered as an independent professional society in the name of ORSI-Karnataka (ORSI-KA) and obtained PAN for filing the income tax directly by ORSI-KA.

The Operational Research Society of India was founded in 1957 with its headquarters at Delhi. In 1971, it was shifted to Kolkata.

The Bangalore Chapter of the Operational Research Society of India (ORSI), founded by late Prof. B.G. Raghavendra, started functioning at the Department of Management Studies, Indian Institute of Science, Bangalore from August 31, 1988.