When and where was the world's first self-checkout system invented and implemented in a retail setting?

Self-checkout technology revolutionized the retail experience, giving customers autonomy and reducing wait times. While commonplace today, this groundbreaking invention has an interesting origin story. Test your knowledge about this significant retail innovation that changed how we shop forever and continues to evolve with artificial intelligence and computer vision technology.

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1992 by Howard Schneider, first implemented at Price Chopper in New York
1987 by IBM, first implemented at Walmart in Arkansas
1998 by NCR Corporation, first implemented at Kroger in Ohio
2001 by Amazon, first implemented at Whole Foods in California