A wiki is a user-editable website. The concept was developed initially by Ward Cunningham and the first implementation was used for the 1995 WikiWikiWeb site.

The program wants everyone to be an author. So, the program slants in favor of authors at some inconvenience to readers¹

Wikis have been instrumental in making use of hypertextuality and online web editing through early programmable http interfaces, to form ever expanding collaborative writing resources, or personal knowledge repositories. Today they come in many shapes from minimal WikiWikiWeb clones, to variations on the same principles, to much more complex and bureaucratic editorial platforms like Wikipedia.