I worked in a gas station taking credit cards w/ an imprint machine. We had a book, updated monthly, of card numbers to decline. That was in 1990. By 1994 we we

I worked in a gas station taking credit cards w/ an imprint machine. We had a book, updated monthly, of card numbers to decline. That was in 1990. By 1994 we were calling a toll free number and reading (part of?) the account number for authorization.