When I go to the library to find a specific book, I go to a computer terminal and type in the search criteria.
But it wasn’t always that way.
The library’s list of books used to be on index cards. They were often typed with a manual typewriter, and dog-eared from all the fingers going through them.
The books all had a pocket either on the inside front cover or the inside back cover. You wrote your name on the card, the librarian date stamped it, then filed it away. And you went home to read the book (or stack of books).
I was hunting down when the index card was invented and ran across A Short History of Index Cards. What’s really interesting is the man who invented the Dewey Decimal System thought eventually everything would go digital. And now you have to read the article so can see what date he made this prediction. Astounding!