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

Retail technology has transformed the shopping experience over the decades. One of the most significant innovations that changed how customers interact with stores was the introduction of self-checkout systems. This technology aimed to reduce wait times, lower operational costs, and give shoppers more control over their purchasing experience. But do you know when and where this retail revolution first began?

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1992 at Walmart in Arkansas, USA
1986 at Price Chopper in New York, USA
1992 at Sainsbury's in London, UK
1998 at Carrefour in Paris, France