In Israel, Thelma Estrin worked on the design and development of WEIZAC, one of the world's first large-scale programmable electronic computers. In the Soviet Union a team of women helped design and build the first digital computer in 1951. In the UK, Kathleen Booth worked with her husband, Andrew Booth on several computers at Birkbeck College. Kathleen Booth was the programmer and Andrew built the machines. Kathleen developed Assembly Language at this time. Kateryna Yushchenko created the Address programming language for the MESM in 1955.