Which invention, patented in 1952 but first used commercially in 1974, revolutionized retail by allowing products to be automatically identified at checkout?

In the world of retail and consumer products, technological innovations have transformed how we shop and interact with brands. One particular invention dramatically changed the retail landscape forever by enabling automatic product identification and revolutionizing inventory management. Test your knowledge about this groundbreaking retail technology that connects physical products to digital systems!

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Universal Product Code (UPC) barcode
Electronic article surveillance (EAS) tag
Radio-frequency identification (RFID) chip
Point of sale (POS) terminal