When was the first commercial barcode scanned in a retail transaction?

Test your knowledge about groundbreaking retail innovations that transformed the industry! This question focuses on a revolutionary point-of-sale technology that fundamentally changed how retailers process transactions and track inventory. While this technology is ubiquitous today, its initial adoption represented a major paradigm shift in retail operations and data management. Can you identify when this game-changing innovation first appeared in retail stores?

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1974 (at Marsh Supermarket in Ohio)
1962 (at Walmart's first store opening)
1981 (at the first Costco warehouse)
1969 (at the first Gap store in San Francisco)