The proliferation of credit cards happened before the proliferation of the internet. How did credit cards work before the internet?

Question

The proliferation of credit cards happened before the proliferation of the internet. How did credit cards work before the internet?

In: 155

Answer 1

And to check if a card was good or not (e.g. stolen, over limit) we we would receive small books with a listing of the credit card numbers (quarterly if I remember correctly). The paper was really thin, the font was really small, and I had to use a ruler to make sure I was reading the correct number all the way across.