There is one existing IT technology that is very similar to RFID, the bar code. The main difference between these two technologies is that the bar codes need a line of sight signals. RFID does not need a line of sight, because it uses radio waves, which is wireless. The other differences between these two technologies is that RFID can store relativel a larger volume of data and can be read up to several feets away. The bar codes need to be in a close range and can only store a limited volume of data. It may seem that every company and organization should switch to use the RFID technology instead of bar code, but the main obstacle in making this switch is the cost of RFID. It is much more expensive compared with the bar code. Nevertheless, RFID has the potential in replacing the bar code technology in the future with a larger volume storage and the ability to retrieve data without using line of sight. For more information about bar code, please visit this website: "http://www.barcodecanada.ca/#barcode"
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