Which technological innovation did the Army & Air Force Exchange Service (AAFES) pioneer in 1979, years before civilian retailers widely adopted it?

The Post Exchange (PX) and Base Exchange (BX) systems represent one of the most significant retail innovations in military history. These stores have evolved from simple sutlers' tents during the American Civil War to modern department store-like facilities serving military personnel worldwide. Test your knowledge about this unique military retail innovation that has shaped the lives of service members for generations.

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Barcode scanning at checkout registers
Credit card payment systems
Self-checkout kiosks
Online ordering system