Which retail company first introduced and patented self-checkout technology in 1992, fundamentally changing the retail landscape?

Retail innovations have transformed how we shop over the decades. One of the most significant changes to the customer experience has been the introduction of self-checkout technology. This innovation has dramatically altered staffing models, store layouts, and customer flow in retail environments worldwide. Test your knowledge about the origins of this retail technology that now seems ubiquitous in modern stores.

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Walmart
Dr. Howard Schneider (who founded Optimal Robotics Corp)
IBM
Kroger