Forty years ago, Michel Foucault observed in a footnote that, curiously, historians had neglected the invention of the index card. The book was Discipline and Punish, which explores the relationship between knowledge and power. The index card was a turning point, Foucault believed, in the relationship between power and technology.
— Read on www.theatlantic.com/technology/archive/2017/12/how-the-index-card-catalogued-the-world/547271/
