Aservice provider (SP) is an organization that provides services, such as consulting, legal, real estate, communications, storage, and processing services, to other organizations. Although a service provider can be a sub-unit of the organization that it serves, it is usually a third-party oroutsourced supplier. Examples includetelecommunications service providers (TSPs),application service providers (ASPs),storage service providers (SSPs), and internet service providers (ISPs).[citation needed] A more traditional term isservice bureau.
IT professionals sometimes differentiate between service providers by categorizing them as type I, II, or III.[1] The three service types are recognized by the IT industry although specifically defined byITIL and the U.S.Telecommunications Act of 1996.
Type III SPs provide IT services to external customers and subsequently can be referred to as external service providers (ESPs)[2] which range from a full IT organization/service outsource viamanaged services or MSPs (managed service providers) to limited product feature delivery via ASPs (application service providers).[3]
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