Ada Byron, Countess of Lovelace (1815-1852) was the world's first computer programmer. Ada corresponded with Charles Babbage on his "analytical engine," a programmable early computer. She translated an article written on the analytical engine, adding her own extensive notes that foresaw computers that could make images and write music. The Department of Defense named a computer language Ada in her honor in 1979.
image by Marie-Chantale Turgeon; CC BY-NC-ND 2.0