Seagate developed the first 5.25-inch hard disk drive (HDD), the 5-megabyte ST-506, in 1980. It was a major supplier in the microcomputer market during the 1980s, especially after the introduction of the IBM XT in 1983. Today, Seagate, along with its competitor Western Digital, dominates the HDD market. Much of its growth has come through its acquisition of competitors. In 1989, Seagate acquired Control Data Corporation’s Imprimis division, the makers of CDC’s HDD products. Seagate acquired Conner Peripherals in 1996, Maxtor in 2006, and Samsung’s HDD business in 2011.
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