Hitachi shows off RFID dust

From The Inquirer, Mar 19, 2004 ... JAPANESE GIANT HITACHI was showing off a mysterious bottle full of tiny blue metallic things. We asked at the stand what these were and a representative declined to comment what this blue dust was. However it has transpired according to sources close to the company that this blue dust is tracking material capable of being built into any number of devices from soaps to CDs ...