The origin of the word 'bug' (computing):

[et13]

It came from the world's first computer - the Mark 1 - a room-size maze of electromechanical circuits built in 1994 in a lab at Harvard University. The computer developed a glitch one day, and no one was able to locate the cause. After hours of searching, a lab assistant finally spotted the problem. It seemed a moth had landed on one of the computer's circuit boards and shorted it out. From that moment on, computer glitches were referred to as bugs.

- Digital Fortress by Dan Brown.