Which retail invention, first introduced in 1937 at a Humpty Dumpty supermarket in Oklahoma, fundamentally changed shopping by allowing customers to select their own merchandise without clerk assistance?

Test your knowledge about one of the most transformative innovations in retail history that changed how customers shop forever. This invention revolutionized the shopping experience, empowered consumers with newfound autonomy, and fundamentally altered store operations and layout strategies. While we take it for granted today, this breakthrough required both technological innovation and a dramatic shift in retail philosophy.

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• The shopping cart
• The barcode scanner
• The self-checkout kiosk
• The electronic price tag

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