This is the top-level category, or the root category for the How I Met Your Mother Wiki
A full list of existing categories can be found at Special:Categories. To add a new category to a page, just add "[[Category:CategoryName]]" to the end of the page.
Ideally, this category should only contain sub-categories, and should not directly link to any other pages, except for the Main Page.. This means that every other category should be a sub-category of this category or another category. Every page should be in at least one category; some may be in more than one category. For example, every episode should be in the Episodes category and a Season X category