Which retail technology innovation, first used in 1974 at an Ohio supermarket, fundamentally changed how products were tracked and sold?

The history of retail has seen remarkable transformations that shaped how we shop today. From the first department stores to digital marketplaces, retail innovation has mirrored broader societal changes. This trivia question focuses on a pivotal technological advancement that revolutionized retail operations in the 20th century and set the foundation for modern inventory management and checkout systems. Test your knowledge of retail history and the technologies that transformed the shopping experience forever!

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The Universal Product Code (UPC) barcode scanner
The electronic cash register (ECR)
The conveyor belt checkout system
The magnetic stripe credit card reader