Which groundbreaking retail technology invention was first patented by NCR employee David Shepard in 1952, but didn't see widespread retail adoption until the 1970s?

The retail landscape has been transformed by technological innovations that have changed how we shop. From humble beginnings to sophisticated AI systems, retail technology has evolved dramatically over decades. This poll tests your knowledge about a pivotal invention that revolutionized retail operations worldwide and continues to impact our shopping experiences today. Do you know your retail tech history?

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Barcode scanner
Electronic cash register
Self-checkout kiosk
Digital price tag system