Cloud computing is
the delivery of computing as a service rather
than a product, whereby shared resources,
software, and information are provided to computers and other devices as a utility(like the electricity grid) over a network (typically
the Internet).
Cloud computing provides computation,
software applications, data access,data management and storage resources
without requiring cloud users to know the location and other details of the
computing infrastructure.
End users access cloud based applications through a web browseror a light weight desktop or mobile app while
the business softwareand
data are stored on servers at
a remote location. Cloud application providers strive to give the same or
better service and performance than if the software programs were installed
locally on end-user computers.
At the foundation of cloud computing is
the broader concept of infrastructure convergence (or Converged
Infrastructure) and shared services. This
type of data centre environment allows enterprises to get their applications up
and running faster, with easier manageability and less maintenance, and enables
IT to more rapidly adjust IT resources (such as servers, storage, and
networking) to meet fluctuating and unpredictable business demand. 
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