The First Computer Bug was an Actual Insect - Apparently.
In 1947, engineers working on the Harvard Mark II computer discovered a moth lodged in a relay switch, causing the machine to malfunction. This was the first recorded instance of a computer bug, and the team taped the moth to the computer log with the note "First actual case of bug being found." The term "bug" was later adopted to describe any technical glitch or problem in computing. This incident is well-documented in the history of computer science and is often cited as the origin of the term "bug."