MediaWiki is the software which underpins this wiki and many other wikis, including Wikipedia. The current version being used by Wikia is 1.19.24. People who are familiar with Wikipedia should be aware that this is an older version than the one currently in use at Wikipedia, so some of the very newest features of the software will not be available on this or any other Wikia wiki.
Documentation for the software can be found at mediawiki.org. This gives the term "MediaWiki" a dual meaning, since it is the exact name of both the software and the wiki which documents that software.
Specific pages of that wiki can be linked on this wiki through the interwiki shortcut of [[mw:articlename]]. For instance, MediaWiki's documentation on pywikipedia can be linked thusly: mw:Manual:Pywikipediabot.