The most prominent and, some would say, successful
wiki (from the Hawaiian word wikiwiki, meaning "quick")
is wikipedia.org, a giant, free, collaborative encyclopedia started in 2001. Today it has 709,000 articles in 60 languages and is edited and expanded by thousands of people every day. Any visitor who believes an entry has an error can instantly make a change by clicking the Edit This Page tab--no onClick="window.open('','popup1','height=150,width=325,scrollbars=yes,resize=yes')" target="popup1" class="sidebar">HTML (click on a blue word for its definition) needed. And if someone doesn't like that change, he or she can change it again or just undo it: The wiki keeps track of every version, so no change is permanent. Eventually the self-corrective nature of the process makes it work.