When was the world's first self-checkout system invented and installed in a retail store?

The retail industry has been transformed by numerous technological innovations over the decades. One significant advancement that changed how we shop was the introduction of self-checkout systems. These machines reduced wait times, changed staffing needs, and created a new shopping experience. But do you know when this retail technology first appeared in stores? Test your knowledge of retail innovation history!

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1992 by Howard Schneider, first installed at Price Chopper Supermarket in New York
1984 by IBM, first installed at Walmart in Arkansas
2001 by NCR Corporation, first installed at Kroger in Cincinnati
1974 by David Humble, first installed at Sears in Florida