When was the first commercial barcode scanner installed in a retail store, marking the beginning of modern checkout systems?

The introduction of barcode technology revolutionized retail operations worldwide, but its journey from invention to widespread adoption wasn't straightforward. This seemingly simple pattern of black and white lines transformed inventory management, checkout efficiency, and overall retail operations. Test your knowledge about this pivotal retail technology innovation that fundamentally changed how products are tracked and sold across the globe.

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1974, at Marsh Supermarket in Troy, Ohio
1969, at Walmart's first store in Rogers, Arkansas
1981, at the first Costco warehouse in Seattle, Washington
1966, at Kroger's flagship store in Cincinnati, Ohio