Dina St Johnston was founder of the UK's first Software House. Dina left school at 16, studied for a Mathematics degree part-time and joined Elliott-Automation in 1953. She left Elliott-Automation in 1958 to start her own company, Vaughan Programming Services. In this talk we will illustrate some of Dina's projects and set her life in the context of about 50 other women pioneers who started work as computer programmers between 1949 and 1959.