!!! Overview
[{$pagename}] are defined within the [OAuth 2.0] [RFCs]

[OAuth 2.0] [Actors] [1]
* [Resource Owner] - The [End-User] aka [Subject] - The [Entity] that is [Delegating|Delegation] to an [OAuth Client], access to a [Resource Server].
* [OAuth Client] - An [application] that is a [Relying Party] that is requesting [Authorization] to act on the [Resource Owner]’s behalf to access the [resources].
* [Authorization Server] ([AS]) - The [Entity] ([STS]) issuing [Access Tokens] and [Refresh Tokens].
* [Resource Server] - The [Entity] hosting the [Protected Resources]. (Which may be an [Application Programming Interface] or [API])

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - based loosely on [http://en.wikipedia.org/wiki/OAuth] - Retrieved 2013-03-29