Which military technology development during World War II later became a retail innovation that revolutionized grocery shopping and inventory management?

Military technology has often found its way into civilian retail applications. From RFID tracking (originally developed for aircraft identification) to GPS systems that now power delivery apps, military innovations have transformed how we shop and sell. This trivia question explores one of the most significant military-to-retail technology transitions that changed consumer habits forever. Test your knowledge of how wartime necessity became retail innovation!

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Barcode scanning, developed from radar pulse-return technology used to identify aircraft
Self-checkout kiosks, adapted from military field ration distribution systems
Electronic payment systems, derived from military cryptography used for secure communications
Automated inventory tracking, based on ammunition counting systems used on battleships