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

The retail landscape has been transformed by numerous technological innovations over the decades. One of the most significant changes to the customer experience has been the introduction of self-checkout systems, which dramatically altered the traditional cashier-customer dynamic. This technology has impacted labor costs, customer wait times, and store operations across the retail sector. Test your knowledge about when this retail technology milestone first appeared in stores.

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1992
1980
2001
1975