From Memory Alpha, the free Star Trek reference.

[edit] Main Page Panels

By separating the content of the Main Page into its component panels, the content is compartmentalized, and each section becomes easier to maintain. The Main page itself becomes easier to edit and extend. Only the basic layout remains on the actual Main Page.

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Main/Panels/Article of the Week	Main/Panels/Browse	Main/Panels/Calendar
Main/Panels/Did You Know	Main/Panels/Edit	Main/Panels/Footer
Main/Panels/Header	Main/Panels/Languages	Main/Panels/News
Main/Panels/News/Sandbox/MP2	Main/Panels/Picture of the Day	Main/Panels/Related
Main/Panels/Upcoming Episodes and Media	Main/Panels/Where to watch

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There are also two helper templates at {{Panel}} and {{Colored Panel}}.