Which company first introduced and patented self-checkout technology in retail stores?

Retail technology has transformed how we shop over the decades. One of the most significant innovations in reducing checkout lines and empowering customers was the introduction of self-checkout systems. This technology fundamentally changed store operations, labor allocation, and the customer experience. Test your knowledge about this retail revolution that continues to evolve with increasingly frictionless payment systems.

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IBM (with its 'Shopping Buddy' system)
NCR Corporation (with its 'CheckRobot' system)
Fujitsu (with its 'U-Scan' system)
Walmart (with its 'Rapid Checkout' system)