Cloud computing is internet-based computing in which large groups of remote servers are networked so as to allow sharing of data-processing of tasks, centralized data storage, and online access to computer services or resources. The "cloud" in cloud computing can be defined as the set of hardware, networks, storage, services, and interfaces that combine to deliver aspects of computing as a service. Cloud services include the delivery of software, infrastructure, and storage over the internet based on user demand. It provides the means through which everything can be delivered to you as a service wherever and whenever you need. This is why most people see cloud computing as the next stage in the Internet's evolution.
Cloud computing's goal is to apply traditional supercomputing, or high-performance computing power, normally used by military and research facilities. To achieve this, cloud computing uses networks of large groups of servers typically running low cost consumer PC technology with specialized connections to spread data-processing chores across them. It is offered in different forms: public clouds, private clouds, and hybrid clouds, which combine both public and private. Often, virtualization techniques are used to maximize the power of cloud computing.
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