And don't even get me going on GPS/GNSS and RFID -
Seamless Tracking: GNSS plus RFID
August 1, 2009
Combining 0.4-millimeter RFID tracking chips and GPS-enabled handheld reader terminals can correct the lack of certainty, clarity, and certification in international goods tracking, at every step along the way from producer to consumer.
http://www.gpsworld.com/transportati...plus-rfid-8654
Or RFID and nanotech -
http://www.b-eye-network.com/blogs/l...tracking_a.php