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Many know it as the tiny tracker that helps people unlock their doors and find their keys, but RFID has a fascinating origin story. The small but mighty tech actually began as a covert listening device over the airfields of WWII. Today, it\\u2019s still being used to save lives \\u2013 in the manufacturing plant. Hear how RFIDs have taken off since the war and where they\\u2019re headed next.