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. 17 August 2018. <http://www.yourdictionary.com/card-column>.
card column. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/card-column