The Origin of the Term 'Bug' in Computing

Why are computer bugs called bugs and what's the connection with a moth in a notebook? The term first appeared in the 19th century—for instance, Thomas Edison often used it to describe small yet elusive and 'annoying as bugs' mechanical failures. However, it was popularized by American scientist Grace Hopper in 1947 when she discovered a moth inside a malfunctioning computer that had shorted the circuits. They ended up pasting the culprit into a journal with the note 'First actual case of bug being found,' and the extraction process was called debugging.