Friday, October 7th is Ada Lovelace Day, a day dedicated to celebrating the contributions of women in STEM fields of endeavor. Lovelace was a 19th-century computer pioneer considered to be the first computer programmer, based on her work with inventor Charles Babbbage's Analytical Engine. Explore a directory of heroines, read inspirational stories, learn about local events commemorating the day—or make a contribution of your own to the website.