Data Securities International, DSI was a technology escrow administration company based in San Francisco, California. Founded in 1982, the company escrows source code and other maintenance materials for licensees and stakeholders. The company was acquired by Iron Mountain Incorporated in 1997. In 2021 Iron Mountain sold DSI (now IPM within IRM) for 220 million (see NASDAQ). Dwight C. Olson was the founder of Data Securities International.