In 1945, computers filled entire rooms and produced a lot of heat that attracted bugs, which crawled inside the machines and caused short circuits. On 9 September 1945, American computer scientist Grace Hopper (1906–1992) found that a moth had caused a malfunction in the Harvard Mark II computer, and she taped the moth into the computer’s log book. The term “bug” for a computer problem has been used ever since.

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