Lillian Gilbreth became the first woman engineer elected to the NAE in 1965. In 1973, Grace Hopper became the second woman engineer elected. Mildred Dresselhaus was the third woman engineer elected in 1974. Betsy Ancker-Johnson was the fourth woman engineer elected to the NAE in 1975. To date, 2,330 male engineers have been elected to the NAE since 1964 compared to the only 37 women engineers that have been elected.