Which retail innovation, first used commercially in 1974 on a pack of Wrigley's gum, fundamentally transformed inventory management and is estimated to save retailers over $18 billion annually?

In the world of retail, technological innovations have dramatically transformed how customers shop and how businesses operate. One particular invention revolutionized inventory management and checkout processes worldwide, becoming ubiquitous in stores across the globe. Test your knowledge about this game-changing retail technology that bridged the gap between physical products and digital data systems.

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The Universal Product Code (UPC) barcode system
Electronic Article Surveillance (EAS) security tags
Point of Sale (POS) touchscreen terminals
Electronic Shelf Labels (ESL) technology