Which retail technology invention, first used commercially in 1974 on a pack of Wrigley's gum, revolutionized checkout efficiency and inventory tracking?

The world of retail has been transformed by technological innovations that changed how we shop forever. Many inventions and discoveries have revolutionized the shopping experience, from physical stores to digital platforms. This trivia question focuses on a pivotal retail technology innovation that fundamentally altered the checkout process and inventory management across the globe.

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Universal Product Code (UPC) barcode scanner
Electronic point-of-sale (EPOS) touchscreen system
Radio-frequency identification (RFID) tag
Near-field communication (NFC) payment terminal