40% of IT managers surveyed by Gartner said their data centers comprised mainframes running Unix, Linux and Windows. 14% said they had a mainframe with just Unix and Windows, 4% were running Windows on a mainframe, and just 1% had a mainframe running Unix only. 24% said they were running with Unix, Linux and Windows but without a mainframe. 10% of the total group questioned were running Unix and Windows but not running any mainframe systems, 3% were using Windows and Linux in a mainframe-free environment, and only 4% were running Windows without mainframe hardware.
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