RFID
A technology that incorporates the use of electromagnetic or electrostatic coupling in the radio frequency (RF) portion of the electromagnetic spectrum to uniquely identify an object, animal, or person. RFID is coming into increasing use in industry as an alternative to the bar code. The advantage of RFID is that it does not require direct contact or line-of-sight scanning.
From :www.directedi.com/press/edi-glossary.html

stands for radio frequency identification. It is a technology that has existed for decades. At a simple level, it is a technology that involves tags that emit radio signals and devices called readers that pick up the signal. RFID technology is a fundamental element of the EPCglobal Network.
From : www.apparelsearch.com/rfid_definitions_clothing_industry.htm