Parent categories

This is a container category. Due to its scope, it should only contain subcategories.

This is a hidden category. It is not shown on its member pages, unless the corresponding user preference 'Show hidden categories' is set.

This is a tracking category. It builds and maintains a list of pages primarily for the sake of the list itself. Pages are added to tracking categories through templates.

The subcategories of this category are entirely populated by subcategories. To add a category to this category, tag it with {{Container category}} or {{Tractor Wiki category}} (with a parameter).