Kathleen Booth
Kathleen Booth was a pioneering British programmer, best known for creating the first assembly language and designing the assembler for the first computer systems at Birkbeck College, University of London. This was the foundation for many advanced computer languages that would be developed later. She earned a bachelor's degree in math from the University of London, earned her PhD in Applied Mathematics in 1950, and worked at Birkbeck College for 20 years, from 1942 - 1962. She also co-founded the Department of Numerical Automation in 1957. Booth worked with a team that was considered to be one of the smallest of early British computer groups. Despite this, they made remarkable achievements and revolutionized the world of computer science.
Further information:
Kathleen Booth (1922 - 2022) - Biography - MacTutor History of Mathematics
Kathleen Booth, computer pioneer, bows out at 100 - Archives of IT
Kathleen Booth - Computing History