Radio ID Tags: Beyond Bar Codes (20 May 2002)
RFID systems originated in the 1940s, when the U.S. government used transponders to distinguish friendly aircraft from enemy aircraft. Through the 1970s, the federal government primarily used the systems for projects like tracking livestock and nuclear material.
Article URL: http://www.wired.com/news/technology/0,1282,52343,00.html
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