Which invention, first used commercially in 1974 at an Ohio supermarket, revolutionized retail inventory management by automating product identification?

The modern retail landscape was forever changed by technological innovations that streamlined inventory management. One particular invention revolutionized how products are tracked, counted, and priced in stores worldwide. This poll tests your knowledge about a pivotal moment in retail history that transformed inventory management from a manual process to an automated one, setting the foundation for today's sophisticated retail systems.

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Universal Product Code (UPC) barcode scanning
Radio-frequency identification (RFID) tagging
Electronic shelf labels (ESL)
Point-of-sale (POS) touchscreen terminals