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Radio frequency identification (RFID) tagging is the use of electromagnetic fields for reading tags attached to items, entities or articles for the purpose of identifying and tracking them. It is widely used in industries, warehouses, farmhouses, supermarkets, etc., to keep track of products, inventory, livestock and other merchandise.
Tags can be either read only, which uses a unique serial number as an identification number in a registration system, or read/write capable, which allows tagging details to be manipulated by the main system. RFID tagging is a form of bar code with read and write capabilities; data stored in a tag can be changed, updated and locked. RFID tagging is considered a better way to keep track of merchandise for marketing and stocking purposes, as it can provide information on how fast a product is sold and the kind of consumers who buy it. This allows manufacturers to forecast their product life cycles. The tags used are cost effective and are small enough to fit and to be used on nearly any kind of product.