When was the first barcode scanned in a retail transaction?

Test your knowledge about a revolutionary retail innovation that transformed how we shop! This question explores a technological advancement that changed the face of retail forever and continues to impact shopping experiences worldwide. Can you identify when this game-changing technology first appeared in retail stores?

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1974 (at a Marsh supermarket in Ohio)
1969 (at a Kroger store in Cincinnati)
1981 (at a Walmart in Arkansas)
1962 (at a Kmart in Michigan)