Which retail innovation was first introduced by Kroger in 1992 but became widely adopted after Amazon implemented its 'Just Walk Out' technology in 2018?

The evolution of retail technology has transformed how we shop and experience commerce. One particular innovation revolutionized the retail industry by eliminating the need for cashiers and dramatically speeding up the checkout process. Test your knowledge of this game-changing technology that has become ubiquitous in modern retail environments.

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Self-checkout kiosks
Mobile payment systems
RFID inventory tracking
Digital price tags