A vertical column in a punch card that represented a single character of data by its pattern of punched holes. The common IBM card contained 80 card columns. See punch card.
"card column." YourDictionary, n.d. Web. 10 November 2018. <https://www.yourdictionary.com/card-column>.
card column. (n.d.). Retrieved November 10th, 2018, from https://www.yourdictionary.com/card-column
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