'Has your electronics store (or drugstore or music store or department store) recently replaced its metal shelves with plastic ones? Such a move could signal a switch to a type of product tracking that has the potential to invade your privacy.
Radio Frequency Identification, or RFID, is a wireless technology that allows objects and even people to be tagged and tracked. RFID tags contain microchips and tiny radio antennas and are embedded in products or stuck on labels. (Tags slightly larger than a grain of rice can be implanted under the skin.)'
