Transclusion
From MusicTechWiki
< User:TomHutchison
This page is being Transcluded
Notice, no category of Category:General Announcements because of <noinclude> tags.
However, Category:Foothill-Music-Group will list this page because it is transcluded or outside the <noinclude> tags. It doesn't should because it is has __HIDDENCAT__, see the Category:Foothill-Music-Group category page edit view.