Use sort keys for certain articles, e.g. objects of category System Classifications, so that the article is sorted by a propery sort key instead of S always.
Example: <code><nowiki>[[Category:System Classifications|T]]</nowiki></code>
==== Category Tree ====
The articles and categories are evaluated by the [http://www.mediawiki.org/wiki/Extension:CategoryTree Category Tree extension] and used on the [[SiteMap]] page.
=== Special articles ===