Comparisons

Comparisons
Cloud computing can be confused with:
Grid computing — "a form of distributed computing, whereby a 'super and virtual computer' is composed of a cluster of networked, loosely coupled computers acting in concert to perform very large tasks"
Utility computing — the "packaging of computing resources, such as computation and storage, as a metered service similar to a traditional public utility, such as electricity";[7]
Autonomic computing — "computer systems capable of self-management".[8]
Indeed, many cloud computing deployments depend on grids, have autonomic characteristics, and bill like utilities, but cloud computing tends to expand what is provided by grids and utilities.[9] Some successful cloud architectures have little or no centralized infrastructure or billing systems whatsoever, including peer-to-peer networks such as BitTorrent and Skype, and volunteer computing such as SETI@home.[10][11]

- from http://en.wikipedia.org/wiki/Cloud_computing

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