Which payment system invention from the 1950s is considered the foundation of modern electronic payment processing in retail?

The evolution of payment systems has fundamentally transformed the retail landscape over decades. From cash registers to contactless payments, these innovations have made transactions faster, more secure, and increasingly convenient. This poll tests your knowledge about a pivotal moment in payment technology history that revolutionized how we shop and pay for goods worldwide. Can you identify the groundbreaking invention that set the stage for modern digital payments?

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The Diners Club card, launched in 1950 as the first universal credit card that could be used at multiple establishments
IBM's Electronic Cash Register (ECR), introduced in 1953 to automatically calculate change and print receipts
The Magnetic Ink Character Recognition (MICR) system, developed in 1956 for automated check processing
The Telegraph Credit Authorization system of 1958, which first allowed real-time credit verification in stores