Cloud computing is simply a buzzword used to repackage grid computing and utility computing, both of which have existed for decades.” whatis.com definition of Cloud Computing.
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“The interesting thing about cloud computing is that we’ve redefined cloud computing to include everything that we already do. […] The computer industry is the only industry that is more fashion-driven than women’s fashion. Maybe I’m an idiot, but I have no idea what anyone is talking about. What is it? It’s complete gibberish. It’s insane. When is this idiocy going to stop?Larry Ellisonduring Oracle’s Analyst Day
Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provided as a service over the Internet.
Users need not have knowledge of, expertise in, or control over the technology infrastructure in the "cloud" that supports them.[
The act of joining multiple computer together to work on a complex problem with the intent to find a solution much faster (grid).
Virtual Private Cloud
(not own data center, hardware; use outside provider of servers, storage, and bandwidth)
(tens of thousands of server computers)
Platform as a Service (PaaS)
Cloud-based User Applications