Which of these retail technology inventions was first patented in 1951, but took nearly 20 years to become widely adopted due to skepticism about its marketing potential?

Throughout history, certain technological inventions and discoveries have fundamentally transformed how retail operates and how customers shop. These breakthrough innovations didn't just improve existing processes—they completely revolutionized the retail landscape, creating new marketing strategies and customer loyalty opportunities. Test your knowledge about these game-changing retail inventions that merchants initially doubted but customers eventually couldn't live without.

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Universal Product Code (barcode scanning)
Electronic point-of-sale systems
RFID inventory tracking
Self-checkout kiosks