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A site is a collection of openly available, woven Internet web pages that share a single domain. Internet sites can be produced and also maintained by an individual, group, business or company to offer a selection of functions. Together, all openly available sites comprise the Internet. Web sites come in a nearly endless range, including academic websites, news websites, forums, social media sites, e-commerce websites, and so on.
What is Pligg?

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