Which retail technology innovation, first implemented in a supermarket in 1974, fundamentally changed food shopping and is now used in virtually every grocery store worldwide?

The food retail industry has undergone significant technological transformations over the decades. From manual price tags to electronic shelf labels, from traditional checkout to self-service kiosks, the way we shop for food has been revolutionized. This poll tests your knowledge about a groundbreaking technology that changed how we purchase groceries and transformed retail operations in food stores worldwide.

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The Universal Product Code (UPC) barcode scanner
Electronic shelf labels (ESL)
Self-checkout kiosks
Refrigerated display cases