Which payment innovation, first introduced in 1950, revolutionized retail by allowing customers to make purchases without carrying cash?

Before digital wallets and contactless payments dominated retail, payment systems evolved through various technological revolutions. This trivia question explores a pivotal moment in retail payment history that fundamentally changed how consumers interacted with merchants and financial institutions. Test your knowledge of retail payment evolution that laid the groundwork for today's seamless transaction experiences.

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Diners Club card (the world's first universal charge card)
The mechanical cash register with receipt capability
The first electronic funds transfer (EFT) system
The magnetic stripe technology for payment cards