Wikipedia (pronounced /ˌwiːkiˈpiːdiə/ or /ˌwɪkiˈpiːdiə/) is a multilingual, web-based, free content encyclopedia project. The name Wikipedia is a portmanteau of the words wiki (a type of collaborative website) and encyclopedia. Wikipedia's articles provide links to guide the user to related pages with additional information.
Wikipedia is written collaboratively by volunteers from all around the world. Since its creation in 2001, Wikipedia has grown rapidly into one of the largest reference Web sites. There are more than 75,000 active contributors working on some 9,000,000 articles in more than 250 languages. As of today, there are 2,219,222 articles in English; every day hundreds of thousands of visitors from around the world make tens of thousands of edits and create thousands of new articles to enhance the knowledge held by the Wikipedia encyclopedia. (See also: Wikipedia:Statistics).
Visitors do not need specialised qualifications to contribute, since their primary role is to write articles that cover existing knowledge; this means that people of all ages and cultural and social backgrounds can write Wikipedia articles. With rare exceptions, articles can be edited by anyone with access to the Internet, simply by clicking the edit this page link. Anyone is welcome to add information, cross-references or citations, as long as they do so within Wikipedia's editing policies and to an appropriate standard. For example, if you add information to an article, be sure to include your references, as unreferenced facts are subject to removal.
There is no need to worry about accidentally damaging Wikipedia when adding or improving information, as other editors are always around to advise or correct obvious errors, and Wikipedia's software, known as MediaWiki, is carefully designed to allow easy reversal of editorial mistakes.
Because Wikipedia is an ongoing work to which, in principle, anybody can contribute, it differs from a paper-based reference source in important ways. In particular, older articles tend to be more comprehensive and balanced, while newer articles more frequently contain significant misinformation, unencyclopedic content, or vandalism. Users need to be aware of this to obtain valid information and avoid misinformation that has been recently added and not yet removed (see Researching with Wikipedia for more details). However, unlike a paper reference source, Wikipedia is continually updated, with the creation or updating of articles on topical events within seconds, minutes or hours, rather than months or years for printed encyclopedias.
If you have not done so, we invite you to take a few moments to read What Wikipedia is (and is not), so that you have an understanding of how to consult or contribute to Wikipedia. Further information on key topics appears below.
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The good thing of wikipedia is this is a free web encyclopedia. Not like other encyclopedias out there, you need to purchase there full CD or DVD compilation to Accesses Its content. But of course it is optional on buying CD or DVD compilations of Encyclopedias, One of this options is if you don't have an internet connection that you badly need encyclopedia.
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