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...and one that it kept: Mainframes
...and one that it kept: Mainframes

For those of you who thought mainframes went the way of the punch card, well, you're not far off. Mainframe sales made up less than a quarter of all server sales last year, according to IDC.

But IBM keeps trucking along. In fact, Big Blue dominates the mainframe market with about a 90% share, bringing in $11 billion in sales in 2009.

Last updated June 16 2011: 9:21 AM ET
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