Which military retail innovation, first introduced during World War II, revolutionized how products were tracked and later became standard in civilian retail?

The military supply chain has evolved dramatically over centuries, from basic quartermaster operations to sophisticated retail systems. Modern military exchanges and commissaries represent a unique retail sector with over $20 billion in annual sales globally. These institutions have pioneered many retail innovations out of necessity, from early inventory management systems to modern global supply chain solutions. Test your knowledge about this fascinating intersection of military history and retail development!

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Standardized SKU (Stock Keeping Unit) system
First computerized point-of-sale terminals
Customer loyalty card program
Self-service shopping format