Joan Winifred Joslin (née Glover, 11 March 1923 – 8 February 2020) was a British codebreaker at Bletchley Park during World War II.
[1][2] After six weeks learning to use Hollerith machines for code-breaking, she worked during the war to decrypt messages from Japanese airplanes and German ships.
[1][3] Her work helped locate and sink the German battleship Scharnhorst.
[3] Joslin met her husband at her first day of work at the facility; they became engaged three years later, in 1944 and married after the war finished.
[1][2][3] Joslin was interviewed as part of the Bletchley Park Oral History Project in May 2014.