Which groundbreaking retail technology, first patented in 1952 but not commercially implemented until 1974, was initially developed using modified movie theater equipment?

The retail landscape has been transformed by numerous technological breakthroughs throughout history. These innovations have fundamentally changed how consumers shop and how businesses operate. This trivia question explores a pivotal retail invention that revolutionized the way products are identified and tracked, leading to faster checkouts, improved inventory management, and data collection capabilities that power today's retail analytics.

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Barcode scanner
Electronic cash register
RFID tag
Self-checkout kiosk