I am in the IT business and recently had a meeting with a vendor who sells RFID devices. RFID is Radio Frequency IDentification. It is a very small transmitter that sends out an identification signal. It is used in several popular applications like EZ-PASS for paying highway and bridge tolls and Exxon/Mobil Speedpass. One of his samples was a casino chip. He couldn't give me his sample but sent me this chip, which I like even better.