The next time you hear someone talk about debugging a computer program, think of Grace Hopper, the U.S. Naval officer and pioneering computer scientist who once removed an actual bug (okay, a moth) from a glitchy machine. Hopper is also known for being one of the first software engineers, inventing the compiler, and generally being a bad-ass lady computer scientist when that world was very much closed off to women. And although things have changed, the computing world is still overwhelmingly male. Which is why it’s extra-exciting (and important!) that Baltimore plays host to the international Grace Hopper Celebration of Women in Computing this week.