Which retail innovation, invented in 1974, was first used at a Marsh Supermarket in Ohio and revolutionized checkout efficiency and inventory tracking?

The retail landscape has been shaped by groundbreaking inventions that transformed how products reach consumers. From humble beginnings to technological marvels, these innovations have revolutionized shopping experiences worldwide. This trivia question explores a pivotal invention that fundamentally changed retail operations and consumer behavior. Test your knowledge about the discoveries that built today's retail environment!

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Universal Product Code (UPC) barcode scanning system
Electronic article surveillance (EAS) anti-theft system
Point-of-sale (POS) credit card processing terminal
Radio-frequency identification (RFID) inventory tracking