December 31, 2002 - Hitachi closes deal to purchase IBM's hard disk drive operation for $2.05 billion. December 06, 2002 - Hitachi announces it has bought IBM's hard disk drive business and establishes Hitachi Global Storage Technologies. Hitachi will become the wholly owned subsidiary by year-end 2005. January 5, 1984 - Hitachi announces it has developed the first memory chip capable of holding 1MB. |