Which retail payment innovation holds the Guinness World Record for 'First Self-Service Checkout System' that fundamentally changed customer shopping experience?

World records aren't just about physical feats—they also exist in the retail space! This trivia question explores an extraordinary milestone in retail payment systems that forever changed how consumers interact with products. Test your knowledge about a revolutionary shopping technology that earned its place in the Guinness World Records and transformed customer experience worldwide.

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Amazon Go's 'Just Walk Out' technology (2016)
NCR's 'CheckRobot' system in Florida (1986)
IBM's 'FastLane' checkout system (1998)
Walmart's 'Scan & Go' mobile payment system (2012)