A 3 x 5 history of the cards that helped catalog all of human knowledge in a way anybody could use. …
http://www.popularmechanics.com/culture/a19379/a-short-history-of-the-index-card/
A 3 x 5 history of the cards that helped catalog all of human knowledge in a way anybody could use. …
http://www.popularmechanics.com/culture/a19379/a-short-history-of-the-index-card/