Which military technology from World War II directly led to the development of a revolutionary retail advertising and inventory tracking system in the 1970s?

Throughout history, military conflicts have significantly influenced advertising techniques and retail strategies. From wartime propaganda evolving into commercial marketing to military technologies transforming into everyday retail innovations, the connection is fascinating. This trivia question explores how a famous WWII military necessity transformed post-war retail marketing in an unexpected way.

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Radar technology, which evolved into RFID inventory tracking systems
Walkie-talkies, which became the basis for in-store communication systems
Aircraft targeting systems, which inspired early digital retail displays
Military ration packaging, which led to modern product barcoding