Wiki is a piece of server software that allows users to freely create and
edit Web page content using any Web browser. Wiki supports hyperlinks and has a
simple text syntax for creating new pages and crosslinks between internal pages
on the fly.
Wiki is unusual among group communication mechanisms in that it allows the
organization of contributions to be edited in addition to the content itself.
Like many simple concepts, "open editing" has some profound and subtle
effects on Wiki usage. Allowing everyday users to create and edit any page in a
Web site is exciting in that it encourages democratic use of the Web and
promotes content composition by nontechnical users.
Historical Note. The first ever wiki site was created for the Portland
Pattern Repository in 1995. That site now hosts tens of thousands of pages.