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

Self-checkout systems have transformed how we shop, but their history might surprise you! Test your knowledge about this retail technology that changed customer experiences forever. While now commonplace in stores worldwide, self-checkout has an interesting origin story that few shoppers know. Can you identify when this revolutionary retail technology first appeared in stores?

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1992, at Walmart in Arkansas
1986, at Price Chopper in New York
2001, at Tesco in London
1978, at Kroger in Cincinnati