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) system has been a cornerstone of military retail for over a century, providing goods and services to service members worldwide. This retail network has evolved through wars, technological advancements, and changing military needs. Test your knowledge about this unique retail system that has played a crucial role in maintaining military morale and readiness throughout history.

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Barcode scanning at checkout registers
Credit card payment systems
Self-service checkout kiosks
Computerized inventory management