Which retail technology innovation was first introduced to improve customer experience in 1974, forever changing how products were identified and processed at checkout?

Test your knowledge about groundbreaking inventions that transformed the retail customer experience! These technological innovations fundamentally changed how customers interact with stores and products, creating new shopping paradigms and customer engagement models. Can you identify when these retail game-changers first appeared on the scene?

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The UPC barcode scanner (first used at a Marsh Supermarket in Ohio)
The electronic point-of-sale (EPOS) system with integrated inventory management
The self-service checkout kiosk
The electronic anti-theft security tag system