Well, years ago I was implementing the marc21 file format, which is the format used for the paper cards. What's more, when the card systems, in the libraries I

Well, years ago I was implementing the marc21 file format, which is the format used for the paper cards. What's more, when the card systems, in the libraries I was using, had been moved to computers, I could search the cards, and I even had a view which looked exactly like on the paper cards. So in reality the computers just made the searching faster and parallel.