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Utility Computing

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ALSO CALLED: On-demand Computing, On Demand Computing
DEFINITION: On-demand (OD) computing is an increasingly popular enterprise model in which computing resources are made available to the user as needed. The resources may be maintained within the user's enterprise, or made available by a service provider. The on-demand model was developed to overcome the common challenge to an enterprise of being able to meet fluctuating demands efficiently. Because an enterprise's  … 
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UTILITY COMPUTING DEFINITION (continued): …  demand on computing resources can vary drastically from one time to another, maintaining sufficient resources to meet peak requirements can be costly. Conversely, if the enterprise cuts costs by only maintaining minimal computing resources, there will not be sufficient resources to meet peak requirements. On-demand computing products are rapidly becoming prevalent in the marketplace. Computer Associates, HP, IBM, Microsoft, and Sun Microsystems are among the more prominent on-demand vendors. These companies refer to their on-demand products and services by a variety of names. IBM calls theirs … 
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