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A site is a collection of publicly easily accessible, interlinked Websites that share a single domain name. Websites can be developed and kept by a private, group, organisation or organization to offer a selection of functions. Together, all publicly accessible websites constitute the Internet. Sites come in a virtually limitless selection, consisting of academic sites, news websites, forums, social media sites, shopping websites, and more.
What is Pligg?

Pligg is an open source content management system that lets you easily create your own user-powered website.