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Computing grids are conceptually not unlike electrical grids. Grid computing uses middleware to coordinate disparate IT resources across a network, allowing them to function as a virtual whole. The goal of a computing grid, like that of the electrical grid, is to provide users with access to the resources they need, when they need them. Grids address two distinct but related goals: providing remote access to IT assets, and aggregating processing power. The most obvious resource included in a grid is a processor, but grids also encompass sensors, data-storage systems, applications, and other resources.
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