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The first working computer I ever saw was the LEO 3 at John Humphries House, Greenwich, which was shared by the London Boroughs of Bexley, Greenwich and Southwark. Its services were also used by the Forest and Bexley Hospitals and the Bloodstock Agency. I was aged 13 and was part of a group of third-formers at Alleyn's School who went there on an educational visit in 1965. The school also funded the Electronics Society to build a 'computer' based on relays like those of Konrad Zuse.