Which groundbreaking retail payment technology was first demonstrated at a supermarket in Troy, Ohio in 1974, fundamentally changing inventory management and checkout efficiency?

The world of retail payment systems has evolved dramatically over the decades, transforming how we shop and pay for goods. From manual cash registers to contactless payments, this evolution represents some of the most impactful technological innovations in retail. Test your knowledge about a pivotal invention that revolutionized retail transaction processing and set the foundation for modern checkout systems.

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The UPC barcode scanner
The magnetic stripe credit card reader
The electronic cash register with digital display
The PIN pad for debit transactions