A wiki (wɪki/ WIK-ee) is a website which allows collaborative modification of its content and structure directly from the web browser. In a typical wiki, text is written using a simplified markup language (known as "wiki markup")The markup language used on a Wiki page is most commonly called Wiki Syntax. It uses common characters in uncommon ways (or character combinations that are not normally used together) and provides them with a special meaning. Some of the character combinations only work at the beginning of a line, while others can be inserted anywhere in the text and are active until they are turned off., and often edited with the help of a rich-text editor. A wiki Web site operates on a principle of collaborative trust. The simplest wiki programs allow users to create and edit content. The most popular wiki is Wikipedia.
A wiki is run using wiki software, otherwise known as a wiki engine. There are dozens of different wiki engines in use, both standalone and part of other software, such as bug tracking systems. Some wiki engines are open source, whereas others are proprietary. Some permit control over different functions (levels of access); for example, editing rights may permit changing, adding or removing material. Others may permit access without enforcing access control. Other rules may also be imposed to organize content. A wiki engine is a type of content management system, but it differs from most other such systems, including blog software, in that the content is created without any defined owner or leader, and wikis have little implicit structure, allowing structure to emerge according to the needs of the users.The encyclopedia project Wikipedia
Wikipedia is written collaboratively by largely anonymous volunteers who write without pay. Anyone with Internet access can write and make changes to Wikipedia articles, except in limited cases where editing is restricted to prevent disruption or vandalism. Users can contribute anonymously, under a pseudonym, or, if they choose to, with their real identity. https://en.wikipedia.org/wiki/Main_Pageis by far the most popular wiki-based website, and is in fact one of the most widely-viewed sites of any kind of the world, having been ranked in the top ten since 2007. (Wikipedia is not a single wiki but rather a collection of hundreds of wikis, one for each language.) There are at least tens of thousands of other wikis in use, both public and private, including wikis functioning as knowledge management resources, note-taking tools, community websites and intranets.
Ward Cunningham, the developer of the first wiki software, WikiWikiWeb, originally described it as “the simplest online database that could possibly work”.“Wiki” (pronounced WIK-ee) is a Hawaiian word meaning “quick”. For more information please read on at Wikipedia Article on Wiki.1
If you click on the edit link that you will find on every wiki page, it's editing window opens. Now you can see the wiki code. With a click on "save", all changes you made will be interpreted and shown as a html and it is then published online.
- Wikipedia: Free Online Encyclopedia
- Wikimedia Commons: The image library wiki
- Wikispecies: Free species directory
- Wikivoyage: The editable travel guide