A History of the 3 x 5 Index Card

 

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Before Google archived the web and made everything searchable there was the 3″ x 5″ index card used to classify “every known animal, plant, and mineral in the world.” By the 19th century, libraries used index cards as the standard way to store books.

“It’s amazing how much the information revolution we’re still living in can be traced back to a simple 3″ x 5″ piece of card stock.”

Read How the Humble Index Card Foresaw the Internet

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