Which product was the first to be scanned with a barcode in a retail transaction?

The humble barcode transformed retail history by revolutionizing inventory management and checkout processes. This seemingly simple pattern of lines drastically reduced human error, sped up transactions, and paved the way for modern supply chain management. Test your knowledge about this pivotal retail innovation that changed shopping forever and continues to influence how products move from manufacturer to consumer.

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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