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The Mainframe Six (2022)
denote: The Mainframe Six Created 23 September 2022 - Updated 24 September 2022 There are six companies remaining in the mainframe industry - Hitachi, NEC, Fujitsu, Atos (formerly Bull), Unisys, and IBM. Three of those - Fujitsu, NEC, and IBM - still develop their own CPUs, though Fujitsu is likely to do so for only one more generation.
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