Which invention, first used commercially in 1974 at an Ohio supermarket, revolutionized retail by enabling automated product identification and eventually formed the basis for modern loyalty programs?

In the world of retail, technological innovations have dramatically transformed how businesses identify customers and track purchases. One particular invention revolutionized retail operations by eliminating manual price entry and enabling automated customer identification. This technology not only streamlined checkout processes but also created the foundation for modern loyalty programs and personalized marketing. Test your knowledge about this groundbreaking retail technology that bridged physical products with digital identification.

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Universal Product Code (UPC) barcode system
Radio-frequency identification (RFID) tags
Magnetic stripe card readers
Electronic article surveillance (EAS) tags