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cloud computing

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Cloud computing metaphor: the group of networked elements providing services need not be individually addressed or managed by users; instead, the entire provider-managed suite of hardware and software can be thought of as an amorphous cloud. Cloud computing  is an  information technology  (IT) paradigm that enables ubiquitous access to shared pools of configurable  system resources  and higher-level services that can be rapidly  provisioned  with minimal management effort, often over the  Internet . Cloud computing relies on sharing of resources to achieve coherence and  economies of scale , similar to a  public utility . Third-party clouds enable organizations to focus on their  core businesses  instead of expending resources on computer infrastructure and maintenance. [1]  Advocates note that cloud computing allows companies to avoid or minimize up-front  IT infrastructure  costs. Proponents also cl...