Which retail product design innovation of the 1930s fundamentally changed grocery shopping by introducing the concept of self-service and is credited with creating the modern supermarket model?

Throughout history, certain product designs have transformed retail and consumer culture. These innovations didn't just change how we shop—they revolutionized entire industries and shaped modern commerce. This trivia question explores a pivotal moment in retail product design history that continues to influence shopping experiences today. Test your knowledge of how historical design decisions created lasting impacts on consumer behavior and retail strategy!

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The shopping cart, invented by Sylvan Goldman in 1937 for his Humpty Dumpty supermarket chain
The cash register receipt, standardized by NCR Corporation in 1932
The barcode system, first conceptualized by Wallace Flint in 1934
The refrigerated display case, patented by Fred W. Wolf Jr. in 1931