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Cloud computing gives you the option to transform IT infrastructure into a utility - which means you can get into your IT infrastructure via the internet, using computing resources on the cloud. Amazon Web Services (AWS) is one of the cloud providers that offer over 300 services. Cloud providers are companies who own the servers, hire and manage the real estate for the servers. Cloud computing services fall into four different categories: Infrastructure as a Service (IaaS), Platform as a. Service (PaaS) and Software as a service (SaaS). They are all built up on top of one another.