First mentioned computer bug

I just saw the first computer bug that was mentioned long before the term became quite popular in the last 50 years. (Rear Admiral) Grace Hopper, a famous computer pioneer, wrote in her notebook that a moth was found in a relay of her Mark II Aiken Relay Calculator, which lead to a failure. This was at a time where a computer bug had a actual real representation which could be posted into a notebook, as shown below 😉


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