Which invention, patented in 1952 but first used in retail in 1974, revolutionized product tracking and is considered a precursor to modern Retail Internet of Things (IoT) technologies?

Before Amazon GO revolutionized checkout-free shopping with its Just Walk Out technology, retail innovation had been advancing through various technologies. This trivia question explores a significant invention that transformed how products were identified and tracked in retail, laying groundwork for today's IoT-enabled smart stores. Test your knowledge about this pivotal retail technology breakthrough that changed inventory management forever!

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• The Universal Product Code (UPC) barcode
• The electronic anti-theft security tag
• The electronic point-of-sale (EPOS) system
• The magnetic stripe card reader

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