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There was a time when companies used their own generators to produce electricity for running their factories or plants. This usually required a large capital expenditure when purchasing dynamos, and also required maintenance costs. This business model was quickly dropped and companies started to buy electricity from a utility supplier of electricity, because it proved to be cheaper and easier to buy electricity as a commodity without worrying about maintenance and updating equipment. It is becoming increasingly apparent that computing is performing a similar transition at present, with computing, and other information technologies, being sold as a commodity which can be purchased from utility suppliers.
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