What insect did the term "computer bug" come from?
The first computer bug was, indeed, an actual bug. In 1945, Rear Admiral Grace Murray Hopper was assigned to work on the Harvard Mark II Electromechanical Computing Machine when she noticed there was an actual moth stuck in the mechanisms of the computer causing a relay. Even though this was the beginning of the term "computer bug" and "debugging," it is actually not the first time the word "bug" was used in terms of glitchy mechanics. There is a record of Thomas Edison using the word "bug" when referring to an issue with his phonograph all the way back in 1889. Now that's pretty fly! Source: Wired