Do you remember the mechanical ones? And getting the carbon copy from it?
A few years back I was buying something in a jewelry store and their network connection was down. The young lady waiting on me was stumped. She had no way to do the transaction. Then the store manager, a gray-haired guy about my age, came over, pulled a manual machine out from under the counter, swiped my card, and completed the sale. The youngster stared, wide-eyed in amazement. It was like she'd seen her first rotary-dial phone.