Which retail technology innovation was first developed by the U.S. military in 1943 to track and distribute supplies more efficiently, later becoming standard in civilian retail?

Test your knowledge about a groundbreaking retail innovation that revolutionized how military supplies were distributed during World War II. This innovation transformed logistics and became the foundation for modern retail practices in military PX (Post Exchange) systems. The technology developed during this period would later influence civilian retail operations worldwide.

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Punch card inventory system
Mechanical cash registers with military serial numbers
Pneumatic tube messaging for order fulfillment
Carousel-based warehousing system