Which groundbreaking retail technology was first used at a Marsh Supermarket in Troy, Ohio in 1974, revolutionizing how products were identified at checkout?

The world of retail has been transformed by technological innovations that changed how we shop forever. From humble beginnings to sophisticated systems, retail technology has a fascinating history of inventions that revolutionized commerce. This trivia question explores a pivotal moment in the development of point-of-sale technology that fundamentally altered the retail landscape and set the stage for today's shopping experience.

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Universal Product Code (UPC) barcode scanning
Electronic Funds Transfer Point of Sale (EFTPOS) system
Radio-Frequency Identification (RFID) tagging
Self-service checkout kiosk