![IBM's mainframe computer line turns 50](https://cdn.mos.cms.futurecdn.net/885726c1c9ae5304bafbf094250d0b35-320-80.jpg)
The mainframe at 50: how 'big iron' kept its staying power
Why has this technology remained such an important mainstay of IT over the last 50 years? It's simple - innovation.
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