Acharya Nagarjuna University
Large amounts of data have been collected routinely in the course of day-to-day management in business, administration, banking, the delivery of social and health services, environmental protection, security and in politics. Such data is primarily used for accounting and for management of the customer base. Manufacturers selling product on the internet often ask their customers to review their product. Such reviews provide information about these products. They are used by potential customers to find opinions of existing users before deciding to purchase that product. They can also be used by product manufacturers to identify the problems in their product. Unfortunately, the importance of reviews gives good incentives for Spam, which contains false positive or malicious negative opinions.