From Calwiki

Welcome to the Calwiki!

The Calwiki has been set up for students so that they may share with each other information on classes, places to eat, parties, and anything else that relates to Cal. The wiki can be viewed and edited by anyone in the world and is easily searchable and accessible.

The wiki is what you make out of it, so go ahead and start creating articles! For those unfamiliar with wiki markup, take a look at the Editor cheat sheet.

You can see the articles that are currently up by looking at All pages.