RFID
Radio Frequency Identification
RFID (Radio Frequency Identification) is quickly gaining global popularity in a wide range of different scenarios, from stock tracking to access control. RFID essentially works by implanting a small passive or active RF (Radio Frequency) transponder within a device which is commonly termed an RFID Tag. The tag, if passive, will respond when a RFID scanner is passed over it. Alternatively, an active tag constantly transmits identification information up to a distance of several meters.