frequency identification, or RFID, is a generic term for technologies
that use radio waves to automatically identify objects. There
are several methods of identification, but the most common is
to store a serial number that identifies the object, and perhaps
other information, on a microchip that is attached to an antenna
(the chip and the antenna together are called an RFID
or an RFID
The antenna enables the chip to transmit the identification information
to a reader.
The reader converts the radio waves reflected back
from the RFID tag into digital information that can then be passed
on to computers that can make use of it.