9.b. How is the term ‘Debugging’ related to the term parity?

Version 1: In the days of vacuum, tubes, bugs were attracted to the heat given off by the tubes. Programmers frequently spent much of their time scrapping dead bugs off the circuitry, or "de-bugging".

Version 2: Grace Hopper, one of the pioneers in modern programming, couldn’t figure out why her programs were not running correctly (this was back in the days of punch-cards). Finally, she inpected her cards only to find out that a bug had been squashed and covered one of the holes in the punch card.

Regardless of version, bugs caused reliability problems in earlier machines storage and data transmission. As explained before, one additional bit was added to help detect errors: The Parity Bit.