A Computer Called LEO: Lyons Tea Shops and the world’s first office computerThe eccentric story of one of the most bizarre marriages in the history of British business: the invention of the world's first office computer and the Lyons Teashop. The Lyons teashops were one of the great British institutions, providing a cup of tea and a penny bun through the depression and the war, though to the 1970s. Yet Lyons also has a more surprising claim to history. In the 1930s John Simmons, a young maths graduate in charge of the clerks'