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

The introduction of self-checkout technology revolutionized the retail experience by reducing wait times and giving customers more control over their shopping journey. This innovation represents one of the most significant shifts in retail operations in recent decades, changing how we interact with stores and transforming workforce allocation in the retail sector. Test your knowledge about the origins of this game-changing retail technology!

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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 internal 'QuickPay' system)