Which revolutionary retail concept was developed by the U.S. military during WWII before becoming a civilian retail success story?

During World War II, retail innovation played a critical role in supporting troops and maintaining morale. One revolutionary retail concept emerged during this period that would forever change how Americans shop. This retail innovation, born from military necessity, transformed into a civilian retail juggernaut that continues to influence shopping patterns today. Test your knowledge about how military logistics inspired modern retail!

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Self-service supermarkets with shopping carts
Convenience stores with extended hours
Standardized shipping containers for global trade
Mail-order catalog subscriptions