Which groundbreaking payment system was invented by IBM in 1973 that revolutionized retail transactions and eventually became essential infrastructure for e-commerce?

The way we pay for goods has transformed dramatically over the decades. From cash to contactless, payment systems represent some of the most impactful technological innovations in retail history. This trivia question focuses on a pivotal invention that revolutionized retail transactions and shaped modern e-commerce. Test your knowledge about the history of retail payment technology that changed shopping forever!

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Electronic Funds Transfer (EFT)
Universal Product Code (UPC) barcode system
Automated Teller Machine (ATM) network
EFTPOS (Electronic Funds Transfer at Point Of Sale)