Seagate Technology Holdings plc is an Irish-domiciled data storage company. It was incorporated in 1978 as Shugart Technology and commenced business in 1979. Since 2010, the company has been incorporated in Dublin, Ireland, with operational headquarters in Fremont, California, United States. Seagate developed the first 5.25-inch hard disk drive, the 5-megabyte ST-506, in 1980. They were a major supplier in the microcomputer market during the 1980s, especially after the introduction of the IBM XT in 1983. 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. Today, Seagate, along with its competitor Western Digital, dominates the HDD market. Seagate Technology operates manufacturing and R&D operations in Thailand, with locations in Teparuk, Samut Prakan, and Korat, Nakhon Ratchasima. The facilities employ approximately 14,000 to 15,000 people, representing nearly half of the company's global workforce.