Grace Hopper was an American computer scientist and United States Navy rear admiral. One of the first programmers of the Harvard Mark I computer, she was a pioneer of computer programming who invented one of the first compiler related tools. She popularized the idea of...

Cathay Williams (1844 – 1892), a.k.a. William Cathay, was the first known African American woman to enlist in the United States Army, and the only black woman documented to serve in the US army in the 19th century. Born a slave in Independence, Missouri in 1844, Cathay...