Which modern retail technology was first widely implemented during WWII as a direct result of military logistics needs?

During World War II, military necessity drove significant innovation in retail practices that continue to influence modern shopping experiences. From rationing systems to inventory management, the war effort transformed how products were sold and distributed. This poll tests your knowledge about a crucial retail innovation that emerged from military necessity and permanently changed consumer shopping habits worldwide.

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Self-checkout kiosks
Barcode scanning systems
Credit card readers
Electronic cash registers