Cissy, as Andrew stated, "RFID" stands for "radio frequency identification". It is the technology used in smart cards, pay pass, pet id chips, etc. The technology has been around for many years - but recently some people have been experimenting with using implanted chips in humans. Earlier this month I met a gentleman named Amal Graafstra, This guy has two chips already and has been making the radio and talk show rounds. He has used his I.D. to act as passwords for his computer and unlock his apartment and his car! I've been waiting for this connection of technologies. My area of expertise is aftermarket automotive electronics and specifically low and high current switching and relay systems as they relate to convenience and security applications. This is a really cool emerging technology.