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15/02/1951 The first computer for commercial use is tested

3:35

Information Age: The computer that changed our world

1:21

Lyons Electronic Office (LEO) | Standing on the Shoulders of Giants

13:19

LEO the automatic office (1957)

5:19

LEO - Celebrating The Pioneers

The LEO I was the first computer used for commercial business applications. The computer, carrying out a simple test program, was shown to HRH Princess Elizabeth. LEO series computers were still in use until 1981.
    • Essentials 

    • Origins and initial design 

    • Technical description 

    • Applications and successors 

    • Legacy