Category:Random portal component with 16–20 available subpages

It is used to build and maintain a list or lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the encyclopedia's categorization scheme.

More information:

This category is hidden on its member pages—unless the corresponding user preference (Appearance → Show hidden categories) is set.
These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience.
These categories also serve to aggregate members of several lists or subcategories into a larger, more efficient list (discriminated by classifications).
Typically, tracking categories are automatically populated by templates invoked in pages or by the MediaWiki software (see Special:TrackingCategories for an overview of the latter).

Administrators: Please do not delete this category as empty!
This category may be empty occasionally or even most of the time.

WARNING: Do not make decisions based solely on these raw numbers. They require careful interpretation, and should be used only as a guide for further exploration.
The software makes a separate count of the number of available subpages in each of the portal's calls to {{Random portal component}} or {{Transclude random subpage}}, but it does not know how many such calls there are on each page, and it cannot add the numbers. Where a portal has more than one set of subpages, the articles in each set will be counted separately and categorised separately. So a multi-set portal whose subpage counts fall into different groups will be placed in multiple categories ... but because each page appears only once in a category, a portal with several subpage sets each in the same size group will have only category.