The EPC Global Network ...

Radio Frequency Identification (RFID) Technology: What the Future Holds for Commerce, Security, and the Consumer: How RFID and EPC Technology Work ...

... "Because of these advances, it is now possible to store on a microchip a series of zeroes and ones -- digital bits -- that can uniquely identify trillions of different objects -- the way bar codes identify many of today's products, but with potentially much more information about a particular shipment of products. This unique series of digital bits is called the Electronic Product Code, or EPC. Attach a tiny radio antenna to this microchip and you have an EPC tag, a cheaper version of a toll pass which, when asked, can signal its assigned number. The tag is not transmitting information actively. Secure devices called readers that comply with global standards developed through EPCglobal send out radio frequency waves that wake up the tag for a short period of time, enabling it to transmit information stored on the RFID tag -- namely the Electronic Product Code. The EPC can then be matched to the specific product information contained in a corresponding database, which is accessed through a secure network: the EPCglobal Network. " ...