The Infosphere Modifications MediaWiki extension is a special designed extension for the additional requirements of modifications of the Infosphere to avoid modifying actual MediaWiki code.
Added per version 1.0. The "affiliates" list on the Sidebar. It uses the message, MediaWiki:Affiliatesbar to construct a list of titles, links and images to associate with the affiliate in question.
Per version 1.2, the workings changed to allow for a more sophisticated listing (as shown on the right) as well as configuring the bottom symbols (see Table:Affiliates icons for more information.
Added per version 1.3, this adds the Quantcast analytics tag to the bottom. It is similar to Extension:GoogleAnalytics.
Natural language list parser function
Added per version 1.1 and removed per version 1.1.1, moved to its own extension, see Extension:NaturalLanguageList on MediaWiki's own wiki.