History books aren't often filled with the accomplishments of women, unfortunately. So you might not have known that the world's first computer programmer was a woman — or that her name was Ada Lovelace and she lived from 1815 to 1852. As an influential proponent and contributor to Charles Babbage's trailblazing number-crunching machines, you owe more to this tech pioneer than you might think.
Oct. 13 marks Ada Lovelace Day, an "international celebration of the achievements of women in science, technology, engineering and maths." Learn about Augusta Ada King, Countess of Lovelace — the so-called "enchantress of numbers" — in our roundup of six things you didn't (but need to) know about her.