Hidden categories have the __HIDDENCAT__ tag included in the category's source page. Pages with this tag are automatically assigned to the Hidden categories category. In order to be able to view hidden categories on a page, edit your preferences, under the appearance tab, and select to display hidden categories.
This category has the following 20 subcategories, out of 20 total.
- DPL query with no results (2 P)
- Modified Table (2 P)