Which retail innovation was first commercially used in 1974 at an Ohio supermarket when a pack of Wrigley's gum became the first product scanned with this new technology?

In the evolution of retail, certain inventions and discoveries have fundamentally transformed the shopping experience forever. This poll tests your knowledge about a groundbreaking retail innovation that revolutionized inventory management and dramatically accelerated the checkout process in stores worldwide. While now ubiquitous, this technology was once considered revolutionary and faced significant adoption challenges when first introduced.

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The UPC barcode scanner
The electronic cash register (ECR)
The self-checkout kiosk
The magnetic strip credit card reader