Which retail technology innovation was first used commercially at an Ohio supermarket in 1974, scanning a pack of Wrigley's gum, and is now estimated to save retailers over $17 billion annually in labor costs?

The world of retail has been transformed by technological innovations that have revolutionized how we shop. From humble beginnings to sophisticated systems, retail technology has evolved dramatically over the decades. This trivia question focuses on a pivotal invention that changed the landscape of product identification and retail efficiency. Test your knowledge about this groundbreaking retail technology breakthrough!

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Universal Product Code (UPC) barcode scanning system
Radio-frequency identification (RFID) tagging
Electronic shelf labels (ESL)
Near-field communication (NFC) payment terminals