Which retail innovation was first widely implemented in military exchanges before becoming standard in civilian retail?

The U.S. military operates one of the largest retail networks in the world through the Army & Air Force Exchange Service (AAFES) and Navy Exchange Service Command (NEXCOM). These retail operations serve military personnel worldwide with everything from basic necessities to luxury goods, often in challenging environments. This trivia question explores how military retail has pioneered innovative solutions that later influenced civilian retail practices.

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• Self-checkout kiosks
• Universal Product Code (UPC) barcode scanning
• Contactless payment systems
• Digital price tags

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