with the plan of expanding into the far east, it set up british oxygen (far east) ltd, based in tokyo. it established subsidiaries and joint ventures in jamaica, the netherlands, south africa, sweden and spain for a number of products; which included transformers, magnetising equipment, frozen foods, stable isotopes, radioactively labelled compounds and cryogenic systems. in 1971, the company installed the largest mainframe computer in britain, linking a network of computers throughout the country, and sold computer time to outside customers. as a result, boc diversified into the computer business.