Radio-frequency identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. An RFID tag is an object that can be attached to or incorporated into a product, animal, or person for the purpose of identification using radio waves. All RFID tags contain at least two parts. One is an integrated circuit for storing and processing information, modulating and demodulating a radio frequency (RF) signal and perhaps other specialized functions. The second is an antenna for receiving and transmitting the signal.

The RFID tag can automatically be read from several meters away and does not have to be in the line of sight of the reader. The current thrust in RFID use in supply chain management for large enterprises. RFID increases the speed and accuracy with which inventory can be tracked and managed thereby saving money for the business.

RFID tags come in three general varieties: passive, semi-passive (also known as battery-assisted), or active. Passive tags require no internal power source, whereas semi-passive and active tags require a power source, usually a small battery.

Passports, Transport Payments, Product tracking, Automotive, RFID in Inventory Systems, Libraries

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