I don't know why I'm posting this. Nobody on the web is old enough to be able to answer the question that occured to me while standing in a bank queue the other day. But anyway.
What did banks do before computers?
Nowadays we accept that the teller will be able to tell everything about us after a few clicks. It wasn't always thus. What did they do in the mid-70s when you wanted to know what your balance was? I remember going into banks and asking that very question. How did they answer it? Did they disappear into the back and come back with the answer on a scrap of paper? I seem to remember that they did. And if so, where did they get that information from? Was there a Sgt Wilson figure somewhere in a morning coat sitting behind a huge ledger recording the comings and goings on everyone's account with a quill pen?
Nowadays we take it for granted that everything that can be recorded is being recorded somewhere, generally without actual human intervention. The idea that there was a time when nothing happened unless a human being was commanded to make it happen is something I already find amazing.