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There are three general methods to identify and track assets: paper and pencil or similar manual record keeping techniques; bar code techniques using printed paper or plastic labels with laser readers. Barcode labels use light beams which cannot read through dirt, or around corners or through walls, or at distances significantly greater than six inches. Bar code was thus limited to clean environments with a direct line of sight from the reader, and the reader had to be close to the label. The development of radio frequency techniques promised to overcome these limitations and with the introduction of the Radio Frequency Identification products, this promise became reality. By this paper, the authors hope to provide an insight into this new field of wireless technology.
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