Conway Berners-Lee, a mathematician and computer scientist from Birmingham, works in the team that develops the Ferranti Mark 1, the world's first commercial stored program electronic computer. Berners-Lee is demobilized from the British Army in 1947 with the rank of Major. By the late 1960s Berners-Lee leads the Medical Development Team of ICT and then ICL and is involved in some of the earliest developments in the applications of computers in medicine, and his text compression ideas are taken up by an early electronic patient record system. Berners-Lee later marries Mary Lee Woods (also from Birmingham). Woods studies at Birmingham University and later works in the team that develop programs for the Manchester Mark 1, Ferranti Mark 1 and Mark 1 Star computers. In 1955 the Berners-Lees become parents to Tim Berners-Lee, who invents the World Wide Web, making the first proposal for it in March 1989.