– Legend has it that on September 9, 1947, at Harvard University, Grace Murray made a mistake while checking the Hopper Mark II Aiken Relay Calculator. It is later determined that the butterfly is stuck in the device circuit. While Grace was picking up the insect from the scheme, an officer came into the room and asked her what she was doing. He says he is cleaning the computer from insects (in English: debugging). Since then, programming errors have been called steam, and debugging is called debugging.
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