Web Services and Cloud Computing
The following Venn diagram illustrates the relationships among Web Services, service-oriented architecture (SOA), and Cloud Computing. Web Services encapsulates Cloud Computing in this diagram because Cloud Computing uses Web Services for connections (you might find exceptions, but they are rare). It is possible, however, to use Web Services in situations other than Cloud Computing. Such use of Web Services may be part of a service-oriented architecture, but it may not. Web Services could be simply be a connection. Finally, it is possible to have a service-oriented architecture and not use Web Services for connections.

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