In which year was the first commercially successful self-checkout system introduced in a retail store?

Retail technology has dramatically transformed the shopping experience over the decades. Self-checkout systems, now ubiquitous in supermarkets worldwide, represent one of the most significant shifts in how consumers interact with retailers. This innovation changed staffing models, store layouts, and customer experiences. Test your knowledge about when this retail technology milestone first appeared in stores and began changing the retail landscape forever.

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1992 (Price Chopper in New York)
1984 (Kroger in Cincinnati)
2001 (Walmart in Arkansas)
1978 (Safeway in California)