Board Thread:General Discussion/@comment-45720479-20200517222718/@comment-9605025-20200517224848

Some of those categories are built-in maintenance categories and they cannot be removed. However, if you don't want them to show on the article page, edit/create the pages for those categories and place this as part of the pages' content. __HIDDENCAT__ As for the non-built-in categories, those are added to the page via templates. For example, "Articles Lacking Sources From May 2009" is added from Template:Unreferenced; which is used on the page. These categories cannot be removed from individual pages. They must be removed from the template; which will remove the category from all pages.