This is a maintenance category. It is used for maintenance of the Wikipedia project and is not part of the encyclopedia. It contains pages that are not articles, or it groups articles by status rather than content. Do not include this category in content categories.
This category combines all user-created public domain files from May 2012 (2012-05) to enable us to work through the backlog more systematically. It is a member of Category:User-created public domain files.