Which military-developed technology revolutionized retail inventory management and is now used on virtually every consumer product worldwide?

Many innovations we take for granted in modern retail were first developed for military applications. The military's need for efficient logistics, inventory management, and product identification has led to technologies that revolutionized how products are tracked, marketed, and sold worldwide. Test your knowledge about a critical military innovation that transformed the retail landscape and created new possibilities for product marketing and inventory control.

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Barcode/UPC system (originally developed by the US Department of Defense in the 1950s for tracking military equipment)
Canned food preservation (developed for Napoleon's army to extend food shelf life)
Walkie-talkie communication systems (developed during WWII for field coordination)
Vacuum-sealed packaging (created for military MREs to preserve combat rations)