Which of these retail innovations was first patented by Norman Joseph Woodland and Bernard Silver in 1952, but didn't see widespread commercial adoption until the 1970s?

The retail landscape has been transformed by numerous technological breakthroughs over the decades. Some inventions changed how we shop forever, while others laid the groundwork for modern e-commerce and customer experience. This trivia question focuses on a pivotal retail technology that revolutionized inventory management and shopping efficiency. Test your knowledge about this game-changing retail innovation!

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Barcode scanner/UPC system
Electronic point-of-sale terminal (EPOS)
Self-checkout kiosk
RFID inventory tracking