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

The retail landscape has been transformed by numerous technological innovations over the decades. Among these, self-checkout systems have revolutionized the point of sale experience, giving customers more control and potentially reducing wait times. But do you know when and where this now-ubiquitous technology first appeared? Test your knowledge about this significant invention in retail history that changed how we complete our shopping transactions.

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1992 at Walmart in Arkansas, USA
1986 at Price Chopper Supermarket in New York, USA
1992 at Schnucks Supermarket in Missouri, USA
1998 at Tesco in London, UK