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The concept of cloud computing

Cloud Computing refers to cloud computing service, support platform of cloud computing service and related cloud computing architecture technologies. It is the result of the development of computer science and Internet technology and also the key strategic technology and means to lead future innovation in information industry. Cloud computing has created several brand new IT service modes: SaaS (Software as a Service), PaaS (Platform as a Service), IaaS (Infrastructure as a Service). SaaS mode provides low-cost online software rental services; PaaS mode provides fast technology development capacity and operation maintenance capacity; IaaS mode provides low-cost and highly reliable infrastructure hosted services. Cloud computing service mode not only brings in profound changes in the information industry but also gives birth to the re-occupation of global IT industry territories. It also has impact on traditional industries’ further innovation and development.