The United States Department of Energy announced Wednesday that it will spend $32 million on cloud computing test beds.

Cloud computing is the technology behind many popular web services, such as Gmail and Twitter. As opposed to traditional server technologies that only use one server, a cloud uses many, both real and virtualized, as one unit. The advantage is that it is scalable, meaning that a user only uses as much as he needs, and that it is (usually) redundant, meaning that

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