1945, The first computer bug
Computer pioneer Grace Murray Hopper found the first documented live bug in a computer on this day in 1945. Although the term "bug" had been used to describe technical glitches since the late 1800s, the bug that plagued Hopper this day was an actual moth that had managed to get into the circuitry of the Mark II computer at Harvard University. The bug, which Hopper and her assistants removed with tweezers, was preserved at the Naval Museum in Dahlgren, Virginia