Which of these retail technology inventions was patented first and revolutionized inventory management across global retail chains?

Throughout history, technological innovations have revolutionized the retail landscape, transforming how consumers interact with products and services. From the humble beginnings of mechanical cash registers to today's sophisticated AI-powered shopping experiences, retail technology has continuously evolved. This trivia question focuses on a pivotal invention that fundamentally changed retail operations and customer experiences worldwide. Test your knowledge about the groundbreaking technologies that shaped modern retail!

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The Universal Product Code (UPC) barcode system
Self-checkout kiosk technology
RFID (Radio-Frequency Identification) inventory tracking
Electronic Article Surveillance (EAS) anti-theft systems