Which 1970s invention is considered the foundation of modern omnichannel retail by enabling unified inventory tracking across physical and digital sales channels?

In the world of retail, technological innovations have dramatically transformed how brands connect with customers across channels. This trivia question focuses on a pivotal invention that revolutionized omnichannel retail capabilities and fundamentally changed the way retailers manage inventory, track sales, and create seamless shopping experiences. Test your knowledge about this game-changing retail technology!

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Universal Product Code (UPC) barcode system
Electronic Data Interchange (EDI) protocol
Point-of-Sale (POS) terminal
Radio-frequency identification (RFID) tags