Cloud computing  is the on-demand availability of computer system resources , especially data storage cloud storage and computing power , without direct active management by the user. If the connection to the user is relatively close, it may be designated an edge server. Clouds may be limited to a single organization enterprise clouds   , or be available to multiple organizations public cloud. Cloud computing relies on sharing of resources to achieve coherence and economies of scale.
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The best cloud computing services offer the opportunity for businesses to undergo digital transformation in order to improve efficiency and reduce costs. Microsoft Azure. Amazon Web Services. Google Cloud. IBM Cloud. Oracle Cloud Infrastructure. Cloud services have revolutionized computing, not least through IaaS , PaaS , and especially SaaS , which have allowed businesses to develop virtualized IT infrastructure and deliver software through the cloud, independent of a user's operating system. Even better still, businesses can also mix and match cloud services from different providers through cloud brokers in order to ensure these services work to maximum efficiency and cost effectiveness, but also to reduce the chances of vendor lock-in while also improving redundancy.
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