This is a maintenance category, used for maintenance of the Wikipedia project. It is not part of the encyclopedia and contains non-article pages, or groups articles by status rather than subject. Do not include this category in content categories.
This is a tracking category. It builds and maintains a list of pages primarily for the sake of the list itself. They are not part of the encyclopedia's categorization scheme.
The subcategories of this category are other tracking categories. To add a category to this category, tag it with
For a list of the tracking categories that are automatically populated by the wiki software, see Special:TrackingCategories.