Cloud computing: Glossary
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| Cloud | A metaphor for a global network, first used in reference to the telephone network and now commonly used to represent the Internet.
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| Cloud Computing | Cloud computing, often referred to as simply “the cloud,” is the delivery of on-demand computing resources—everything from applications to data centres—over the Internet on a pay-for-use basis.
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| Platform as a Service (PaaS) | Cloud platform services, whereby the computing platform (operating system and associated services) is delivered as a service over the internet by the provider.
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| Software as a Service (SaaS) | Cloud application services, whereby applications are delivered over the internet by the provider so the applications don't have to be purchased, installed, and run on the customer's computers.
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| Infrastructure as a Service (IaaS) or Hardware as a Service (HaaS) | Cloud infrastructure services in which a virtualized environment is delivered as a service by the cloud provider. This infrastructure can include servers, network equipment, and software, including a complete desktop environment such as Windows or Linux.
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| Cloud portability | The ability to move applications and data from one cloud provider to another.
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| Cloud provider | A company that provides cloud-based platform, infrastructure, application, or storage services to other organizations and/or individuals, usually for a fee.
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| Public Cloud | Owned, operated by companies that use them to offer rapid access to affordable computing resources to other organizations/individuals. With PC services, users don’t need to purchase h/w, s/w or supporting infrastructure, which is owned, managed by provide
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