They can track your dogs, they can track cattle, they can track...your groceries? Yes my good folks! Yes, they sure can! Radio Frequency Identification tags are like really smart universal bar codes. Depending on the type of RFID tag it is, the item that is tagged can communicate with an electronic reader and even be detected and traced by satellites. So far, these tags have been used to track cattle, track pets, and is even being looked into being used by the Department of Homeland Security.
One of the futures for this product is to replace UPCs. Rather than scanning each product, the RFID tags would communicate with the electronic reader and be rung up instantaneously and simultaneously. This method would prove to be more effective than the UPC system in place today.
http://www.howstuffworks.com/gadgets/high-tech-gadgets/rfid.htm
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