Which retail innovation was first successfully implemented by Marsh Supermarket in 1974, leading to a revolution in inventory management and checkout efficiency?

The retail landscape has been transformed by numerous technological inventions and discoveries over the decades. From barcode scanners to mobile payment systems, these innovations have revolutionized how we browse, select, and purchase products. This trivia question focuses on a pivotal invention that fundamentally changed retail operations worldwide. Test your knowledge about the technological milestones that shaped modern shopping experiences!

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Universal Product Code (UPC) barcode scanning
Self-checkout kiosks
Electronic price tags
RFID inventory tracking