Which inventor created the world's first self-checkout system (called 'Automated Checkout Machine'), and in what year was it first patented?

Self-checkout systems transformed retail operations worldwide, improving efficiency and customer experience. But like many revolutionary inventions, the path from concept to mainstream adoption wasn't straightforward. This trivia tests your knowledge about a pivotal moment in retail technology history that changed how we shop forever. Do you know when this retail innovation first emerged, and how long it took before becoming commonplace in stores around the world?

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David R. Humble, 1984
Howard Schneider, 1992
George Bauer, 1978
Raymond Damadian, 1987