Future telecommunications systems are based on heterogeneous technologies, both on
network and service levels. This suggests e.g. several wired and wireless networking technologies,
different fixed and mobile terminals, and a variety of software and middleware technologies
applied when implementing services.
Whereas the Web is a service for sharing information over the Internet, the Grid is a service for sharing computer power and data storage capacity over the Internet. The Grid goes well beyond simple communication between computers, and aims ultimately to turn the global network of computers into one vast computational resource.
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