Credit card
A card that pays with the bank's money and lets the holder repay later, ideally with interest if they don't clear the balance.
The first general-purpose card is usually credited to Diners Club in 1950, a cardboard card honoured at a couple of dozen New York restaurants. The tale of founder Frank McNamara forgetting his wallet is probably a later embellishment. 1958 brought both the American Express card and Bank of America's BankAmericard, which eventually became Visa. A charge card must be paid off in full each month, while a credit card's balance can roll over, and that revolving credit, often north of 20% APR in the US, is where issuers make their money.
A credit card also carries protection a debit card lacks. The US Fair Credit Billing Act of 1974 and the UK's Section 75 both let a buyer pursue the lender when a merchant fails to deliver.