Which retail innovation was FIRST pioneered by the Army & Air Force Exchange Service (AAFES) before becoming widespread in civilian retail?

Military exchanges (PX/BX stores) have a fascinating history of retail innovation that directly impacted both military personnel and civilian retail practices. These tax-free department stores on military bases revolutionized how service members shopped and influenced broader retail trends. Test your knowledge about how military retail operations changed the shopping landscape and created lasting commercial legacies that continue to influence consumer markets today.

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Self-service shopping carts (1944)
Barcode scanning at checkout (1972)
Credit card payment system for retail purchases (1979)
Self-checkout kiosks (1986)