What was the first product ever scanned with a barcode scanner in a retail store transaction?

The humble barcode revolutionized retail history, but its path to adoption wasn't straightforward. This seemingly simple pattern of lines dramatically transformed inventory management, checkout speed, and retail operations worldwide. Test your knowledge about this pivotal retail technology that changed shopping forever and continues to be used billions of times daily across the globe.

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A pack of Wrigley's chewing gum
A carton of milk
A loaf of Wonder bread
A can of Campbell's soup