My friend and colleague George Coulouris, who has died aged 87, was a visionary researcher of personal computers and a cycling campaigner.
In 1965, as a lecturer at Imperial College London, he started work on ICL’s content-addressable file store, which sped up BT’s directory inquiries. He then moved in 1971 to Queen Mary and Westfield College (now Queen Mary, University of London), progressing from lecturer to reader to professor in the department of computer science. There, he worked to show that the hardware guru John Iliffe’s designs had real advantages over mainframes of the day.