RFID is not a new technology . It was first used in military. In world war II it was used for an application called ” Identify Friend or Foe” (IFF) 1.A very inportant technology in the context of ubiquitous computing is “Radio-frequency- Identification “, abbreviated “RFID”. The RFID technology is a technology that has the potential to chang e our way of life completely. In recent years, RFID became a “hype” technology. Many companies have already started to use the technology, first in pilots , later in productive environments.

RFID has become popular for using a wide variety of application ranging from asset tracing, services industries, logistics, libraries, manufacturing to supply chain. In 1948 Harry Stockman first introduced the theory and implementation of RFID in his paper entitled “Communication by means of reflected power” 2. But in the decades of 1970’s RFID technology achieved the interest in research community. RFID technology shows great potential for cost reduction, busniness process redsign, supply chain improvement and on-site customer support. RFID is projected to grow rapidly with the phenomenal advancements in wireless communication technologies.

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The libraries across the globe started to use RFID to speed up the self check in/out processes, to control the theft and to ease the inventory control in library. The barcode technology is slowly getting replaced by the RFID technology. RFID tags are a small low cost small device that can hold a limited amount of data and report

the data when queried over radio by radar. It can be active, semi-passive and passive which is available in many sizes with varying data storage capability. Passive tags don’t have internal batteries. It is built to encode data stored in the tag’s microprocessor. Because of the higher cost, active and semi-passive RFID tags are used for valuable asset tracking. The passive RFID tags are used in RFID library management systems