We are in the process of developing comprehensive documentation for MediaWiki (so called handbook or Manual), including an in-depth set of admin and developer pages.
Some information is still held on Meta. Eventually it will be transferred here, but in the meantime, see: m:Help:Contents
See also Pages on Meta linking to this manual.
This category has the following 7 subcategories, out of 7 total.
The number of included categories (C), pages (P) and files (F) is stated in brackets.