Virtual Private Networks started appearing in the 1990s and these offered similar shared services but at a reduced cost. This was also roughly when the cloud symbol was adopted. The services continued to evolve to what we know today.
What is cloud computing?
What the cloud has become now is the delivery of IT services across the internet. The term “as a service” denotes IT resources that can be procured on a subscription basis. Customers do not need to own the infrastructure or manage the data. This is all done by the service provider.
The main benefit is cost. Customers pay only for the resources they use. There is no spare capacity outlay that may never be used. There are no fixed salaries to pay for IT professionals who may not be fully utilized. During the early 2000s serverless applications started becoming common.
The top three service providers
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