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Leo: The world's first business computer

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A computer programmer uses English Electric's super computer Leo III
A computer programmer uses English Electric's super computer Leo III

The world's first business computer, Leo, is celebrating its 60th birthday.

Frank Land, who was involved in the Leo project, explains how the computer filled a huge room, had 6,000 valves, and "generated a lot of heat" - if not that much computer power by modern standards.


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