You've reached the 13th floor ...
To ease your search for information, help, or software, the Structure of this pagesystem is hierarchical.
The highest level is the Menu on the left side, which allows you to quickly adjust the focus, and therefore select the Topic of your choice.
Usually such a topic will be quite large and has to be broken down in Subsections and Pages to allow easy navigation. Those subsections and pages will be represented by Tabs appearing in the upper right area.
Besides normal navigation the usage of Hyperlinks will allow you to jump from one page to another, probably crossing subsection or section boundaries with a simple selection. As an example, here is a hyperlink to the start page.
The Page Index is an automagically created list of all major pages located at the 13thfloor, combined with a statistical overview ...
so what are you waiting for?