To add a new category to a page you can click the Category button at the bottom of the page and type in the name you'd like your category to be called.
A full list of existing categories can be found at Special:Categories.
Pages in category "Browse"
“ These rules are for the wiki's sake and for everyone's safety. Please do not break these rules...
“ This is an important snippet of the Rules page. This is how people should comment. General...
“ These are redirect articles with multiple redirects. They are meant for more in-depth and...