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Cloud computing is a transformative technology with significant potential to solve data-related problems. Cloud computing is a very flexible concept that that includes three major service models - the most well known being software as a service (SaaS), which includes Web services. These Web services perform functions traditionally done with software installed on an individual computer. The second service module is platform as a service (PaaS). This model provides computing services as Website.The final service model is infrastructure as a service (IaaS). It includes business-to-business (B2B) services that are usually invisible to customers.