Which invention, first demonstrated in 1973 and widely implemented by the 1980s, revolutionized retail payment systems by allowing electronic authorization of transactions at point of sale?

The history of retail payment systems represents one of the most transformative technological evolutions in consumer commerce. From the earliest credit cards to today's contactless and cryptocurrency payments, these innovations have fundamentally changed how we shop and how merchants operate. Test your knowledge about a pivotal moment in payment technology that changed retail forever!

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Electronic Funds Transfer at Point of Sale (EFTPOS) terminal
Magnetic stripe credit card reader
Electronic cash register with integrated credit processing
Smart chip payment card (EMV)