Women dominated the early days of programming - so how did men take over, and what can be done to balance things out again? Manuela Saragosa charts the female history of computing, starting with the nineteenth century pioneer Ada Lovelace, with the help of mathematician Hannah Fry and historian Marie Hicks. She also speaks to Dame Steve Shirley, who founded an all-women tech firm in the 1960s. And she asks computing professor Joanna Bryson about her work detecting the gender bias built into modern technology. (Picture: A woman operating an 'electronic brain' used by a German mail order business to open letters in 1958; Credit: Keystone Features/Getty Images)