Which data-driven retail innovation did the U.S. military implement in Post Exchanges (PX) during the Vietnam War era that revolutionized supply chains for deployed troops?

The Post Exchange (PX) and Base Exchange (BX) systems represent one of the most unique retail innovations in military history. These on-base department stores have evolved dramatically since their inception, becoming crucial to military life and morale. This trivia explores a fascinating aspect of how military retail analytics transformed service member shopping experiences during a critical period of military history.

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STANFINS (Standard Finance System) inventory tracking that used punch-card computers to analyze purchase patterns and predict demand
DODAAC (Department of Defense Activity Address Code) system that analyzed regional shopping preferences to customize PX inventory by deployment location
IBM System/360 terminals at checkout counters that tracked individual soldier purchasing habits across all global PX locations
AAFES Retail Intelligence Program that used military intelligence techniques to forecast retail trends in combat zones