The 92-year-old monarch saw a World War Two enigma code machine and the original NeXT computer used by Tim Berners-Lee to design the World Wide Web in 1989.
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She also marked the opening of the museum’s Smith Centre by sharing an archive image on the royal family’s Instagram account, which has 4.5 million followers.
Elizabeth first toured the Science Museum in 1938 and, during her last visit in 2014, opened the Information Age gallery by sending her first Tweet.
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