In pictures: The (mostly) cool history of the IBM mainframe

IBM's iconic mainframe turns 50: In its history the IBM mainframe has been hailed and vilified. It has been born, reborn (many times) and pronounced dead. And yet the Big Iron remains a key computing resource for many large companies and will do so for many years. Here we take a look at the mainframe’s long history, from its use with the US space program to its prominence inside large business datacentres. Take a look.

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From the Computer History Museum: IBM claimed that the April 7, 1964 System/360 announcement was made to more than 100,000 people gathered in 165 cities. Here then CEO Thomas Watson makes the S/360 call.

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In pictures: The (mostly) cool history of the IBM mainframe

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