There is no single best or correct way of attribution, as long as your attribution is reasonable and suited to the medium you're working with. That being said, please include attribution somehow, even if it's a link to an About page that has the relevant info. (More on different media below.)
As stated above, recommended attribution depends on the medium you're working with. For media such as offline materials, video, audio, and images, consider publishing a web page with attribution information. For example, on a webpage featuring your audio recording, provide a credit list of material you used that adheres to best practices above. Doing so allows not only your material, but the materials you attribute, to be found by search engines and other web discovery tools. If possible within the medium, make the Author, Source, and License links the user can follow.
Wikipedia has been censored by some national governments, ranging from specific pages to the entire site.[14][15] Articles on breaking news are often accessed as sources for frequently updated information about those events.[16][17]
The domains wikipedia.com (later redirecting to wikipedia.org) and wikipedia.org were registered on January 12, 2001,[W 6] and January 13, 2001,[W 7] respectively. Wikipedia was launched on January 15, 2001[19] as a single English-language edition at www.wikipedia.com,[W 8] and was announced by Sanger on the Nupedia mailing list.[21] The name originated from a blend of the words wiki and encyclopedia.[22][23] Its integral policy of "neutral point-of-view"[W 9] was codified in its first few months. Otherwise, there were initially relatively few rules, and it operated independently of Nupedia.[21] Bomis originally intended it as a business for profit.[24]
Citing fears of commercial advertising and lack of control, users of the Spanish Wikipedia forked from Wikipedia to create Enciclopedia Libre in February 2002.[W 12] Wales then announced that Wikipedia would not display advertisements, and changed Wikipedia's domain from wikipedia.com to wikipedia.org.[26][W 13]
In January 2007, Wikipedia first became one of the ten most popular websites in the United States, according to Comscore Networks.[42] With 42.9 million unique visitors, it was ranked #9, surpassing The New York Times (#10) and Apple (#11).[42] This marked a significant increase over January 2006, when Wikipedia ranked 33rd, with around 18.3 million unique visitors.[43] In 2014, it received eight billion page views every month.[W 15] On February 9, 2014, The New York Times reported that Wikipedia had 18 billion page views and nearly 500 million unique visitors a month, "according to the ratings firm comScore".[7] As of March 2023[update], it ranked 6th in popularity, according to Similarweb.[44] Loveland and Reagle argue that, in process, Wikipedia follows a long tradition of historical encyclopedias that have accumulated improvements piecemeal through "stigmergic accumulation".[45][46]
In January 2013, 274301 Wikipedia, an asteroid, was named after Wikipedia;[49] in October 2014, Wikipedia was honored with the Wikipedia Monument;[50] and, in July 2015, 106 of the 7,473 700-page volumes of Wikipedia became available as Print Wikipedia.[51] In April 2019, an Israeli lunar lander, Beresheet, crash landed on the surface of the Moon carrying a copy of nearly all of the English Wikipedia engraved on thin nickel plates; experts say the plates likely survived the crash.[52][53] In June 2019, scientists reported that all 16 GB of article text from the English Wikipedia had been encoded into synthetic DNA.[54]
On January 20, 2014, Subodh Varma reporting for The Economic Times indicated that not only had Wikipedia's growth stalled, it "had lost nearly ten percent of its page views last year. There was a decline of about two billion between December 2012 and December 2013. Its most popular versions are leading the slide: page-views of the English Wikipedia declined by twelve percent, those of German version slid by 17 percent and the Japanese version lost nine percent."[55] Varma added, "While Wikipedia's managers think that this could be due to errors in counting, other experts feel that Google's Knowledge Graphs project launched last year may be gobbling up Wikipedia users."[55] When contacted on this matter, Clay Shirky, associate professor at New York University and fellow at Harvard's Berkman Klein Center for Internet & Society said that he suspected much of the page-view decline was due to Knowledge Graphs, stating, "If you can get your question answered from the search page, you don't need to click [any further]."[55] By the end of December 2016, Wikipedia was ranked the fifth most popular website globally.[56]
Due to Wikipedia's increasing popularity, some editions, including the English version, have introduced editing restrictions for certain cases. For instance, on the English Wikipedia and some other language editions, only registered users may create a new article.[W 18] On the English Wikipedia, among others, particularly controversial, sensitive, or vandalism-prone pages have been protected to varying degrees.[W 19][63] A frequently vandalized article can be "semi-protected" or "extended confirmed protected", meaning that only "autoconfirmed" or "extended confirmed" editors can modify it.[W 19] A particularly contentious article may be locked so that only administrators can make changes.[W 20] A 2021 article in the Columbia Journalism Review identified Wikipedia's page-protection policies as "perhaps the most important" means at its disposal to "regulate its market of ideas".[64]
Although changes are not systematically reviewed, Wikipedia's software provides tools allowing anyone to review changes made by others. Each article's History page links to each revision.[note 6][67] On most articles, anyone can view the latest changes and undo others' revisions by clicking a link on the article's History page. Registered users may maintain a "watchlist" of articles that interest them so they can be notified of changes.[W 22] "New pages patrol" is a process where newly created articles are checked for obvious problems.[W 23]
In 2003, economics PhD student Andrea Ciffolilli argued that the low transaction costs of participating in a wiki created a catalyst for collaborative development, and that features such as allowing easy access to past versions of a page favored "creative construction" over "creative destruction".[68]
Any change that deliberately compromises Wikipedia's integrity is considered vandalism. The most common and obvious types of vandalism include additions of obscenities and crude humor; it can also include advertising and other types of spam.[69] Sometimes editors commit vandalism by removing content or entirely blanking a given page. Less common types of vandalism, such as the deliberate addition of plausible but false information, can be more difficult to detect. Vandals can introduce irrelevant formatting, modify page semantics such as the page's title or categorization, manipulate the article's underlying code, or use images disruptively.[W 24]
The two most commonly used namespaces across all editions of Wikipedia are: The article namespace (which are the articles of the encyclopedia) and the category namespace (which are a collection of pages such as articles). In addition, there have been various books and reading list that are composed completely of articles and categories of a certain Wikipedia.
Editors in good standing in the community can request extra user rights, granting them the technical ability to perform certain special actions. In particular, editors can choose to run for "adminship",[87] which includes the ability to delete pages or prevent them from being changed in cases of severe vandalism or editorial disputes.[W 40] Administrators are not supposed to enjoy any special privilege in decision-making; instead, their powers are mostly limited to making edits that have project-wide effects and thus are disallowed to ordinary editors, and to implement restrictions intended to prevent disruptive editors from making unproductive edits.[W 40]
Editors who fail to comply with Wikipedia cultural rituals, such as signing talk page comments, may implicitly signal that they are Wikipedia outsiders, increasing the odds that Wikipedia insiders may target or discount their contributions. Becoming a Wikipedia insider involves non-trivial costs: the contributor is expected to learn Wikipedia-specific technological codes, submit to a sometimes convoluted dispute resolution process, and learn a "baffling culture rich with in-jokes and insider references".[101] Editors who do not log in are in some sense "second-class citizens" on Wikipedia,[101] as "participants are accredited by members of the wiki community, who have a vested interest in preserving the quality of the work product, on the basis of their ongoing participation",[102] but the contribution histories of anonymous unregistered editors recognized only by their IP addresses cannot be attributed to a particular editor with certainty.[102]
Economist Tyler Cowen wrote: "If I had to guess whether Wikipedia or the median refereed journal article on economics was more likely to be true after a not so long think I would opt for Wikipedia." He comments that some traditional sources of non-fiction suffer from systemic biases, and novel results, in his opinion, are over-reported in journal articles as well as relevant information being omitted from news reports. However, he also cautions that errors are frequently found on Internet sites and that academics and experts must be vigilant in correcting them.[141] Amy Bruckman has argued that, due to the number of reviewers, "the content of a popular Wikipedia page is actually the most reliable form of information ever created".[142] In September 2022, The Sydney Morning Herald journalist Liam Mannix noted that, "There's no reason to expect Wikipedia to be accurate... And yet it [is]." Mannix further discussed the multiple studies that have proved Wikipedia to be generally as reliable as Encyclopedia Britannica, summarizing that, "...turning our back on such an extraordinary resource is... well, a little petty."[143]
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