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Utility computing merely means "Pay and Use", with regards to computing power.
Utility computing is not a new concept, but rather has quite a long history. Among the earliest references is:
{{cquote|If computers of the kind I have advocated become the computers of the future, then computing may someday be organized as a public utility just as the telephone system is a public utility... The computer utility could become the basis of a new and important industry.|author=[[John McCarthy (computer scientist)|John McCarthy]]|source=speaking at the MIT Centennial in 1961<ref>{{cite book|title=Architects of the Information Society, Thirty-Five Years of the Laboratory for Computer Science at MIT|editor1-first=Hal|editor1-last=Abelson|first1=Simson|last1=Garfinkel|isbn=978-0-262-07196-3|publisher=MIT Press|year=1999|page=1|url=https://books.google.com/books?id=Fc7dkLGLKrcC&pg=PA1}}</ref>}}
IBM and other mainframe providers conducted this kind of business in the following two decades, often referred to as time-sharing, offering computing power and database storage to banks and other large organizations from their world wide data centers. To facilitate this business model, mainframe operating systems evolved to include process control facilities, security, and user metering. The advent of mini computers changed this business model, by making computers affordable to almost all companies. As Intel and AMD increased the power of PC architecture servers with each new generation of processor, data centers became filled with thousands of servers.
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