Which retail innovation, invented by Norman Joseph Woodland and Bernard Silver in 1952, wasn't widely adopted until the 1970s but eventually revolutionized inventory management and checkout processes?

The retail landscape has been transformed by numerous technological innovations throughout history. Some inventions have completely revolutionized how consumers shop and how retailers operate. This trivia question focuses on a pivotal retail innovation that changed the industry forever and set the foundation for modern commerce tracking systems. Test your knowledge about this groundbreaking retail technology!

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Universal Product Code (UPC) barcode
Electronic cash register
RFID inventory tracking
Self-checkout kiosk