Thread:Project:Support desk/Discussion pages

Product	Version MediaWiki	1.20.1 PHP	5.3.10-1ubuntu3.4 (apache2handler) MySQL	5.5.22-0ubuntu1

URL http://prorexwiki.transaxions.co.uk

How do I set up a discussion system with threads, like the page I am now?

We are using this WIKI as an information centre for a project, as it stands it has no discussion pages. I have checked the support docs but cannot find anything