Which retail innovation was first widely implemented in U.S. military exchanges (PX/BX) during the 1950s, decades before becoming standard in civilian retail?

Military exchanges (PX/BX) represent a unique retail environment that has evolved significantly over centuries. These military department stores have pioneered retail innovations that later influenced civilian markets. From logistics solutions during wartime to modern e-commerce adaptations for deployed personnel, military retail has a fascinating history of innovation. Test your knowledge about a groundbreaking military retail innovation that changed shopping for service members worldwide.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Self-service shopping (allowing customers to select their own merchandise without clerk assistance)
Universal product barcode scanning at checkout
Credit card acceptance with instant authorization across global locations
Computerized inventory management systems