The system was to keep track of who had borrowed a book, so that they could be tracked down if it was not returned.
I remember it being really fun in grade school, to realize I had checked out the same book as an older friend.
The system was to keep track of who had borrowed a book, so that they could be tracked down if it was not returned.
I remember it being really fun in grade school, to realize I had checked out the same book as an older friend.
https://en.wikipedia.org/wiki/File:Library_card.jpg
The Browne Issue System appears to be what most small libraries used.
I would be surprised if you are from somewhere more metropolitan than Kobe Japan [0]. It is much more likely that you are just young.
My library card was a 5x5cm card sleeve. If I borrowed something, the return date was stamped in the book, and on the book's removable 5x15cm slip. That slip was put inside my card, and probably ordered by due date in the librarian's index file.
This was early 1990s in Britain.