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The First Computer Bug Was an Actual Insect

In 1947, a team of engineers at Harvard University was working on the Mark II computer when they encountered a problem. Upon investigation, they found that a moth had become stuck in one of the relay switches, causing the computer to malfunction. The team taped the moth to the computer log and wrote "First actual case of bug being found" next to it. This incident marked the first recorded use of the term "bug" to describe a technical glitch.