Which of these retail technology inventions was first patented by Bernard Silver and Norman Joseph Woodland in 1952, but didn't see widespread retail adoption until the 1970s?

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 significant technological breakthrough that changed the retail industry forever. Test your knowledge about this important invention that we now take for granted but was once considered revolutionary!

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Barcode scanning system
Electronic point-of-sale terminal
Self-checkout kiosk
RFID inventory tracking