what can you tell me about a technology called RFID?

Answer 1

Radio frequency identification, or RFID, is a generic term for technologies that use radio waves to automatically identify people or objects. There are several methods of identification, but the most common is to store a serial number that identifies a person or object, and perhaps other information, on a microchip that is attached to an antenna (the chip and the antenna together are called an RFID transponder or an RFID tag). 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.
RFID is used for everything from tracking cows and pets to triggering equipment down oil wells. The most common applications are payment systems like the toll collection systems, access control and asset tracking.
If you want more information check:
http://www.aimglobal.org/technologies/rfid/what_is_rfid.asp
http://www.rfidjournal.com/

Answer 2

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. Chip-based RFID tags contain silicon chips and antennas. Passive tags require no internal power source, whereas active tags require a power source.

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Answer 3

http://www.infobeagle.com/business/rfid.htm?src=ov