+* **<sipb,\*,\*>** - The general class for SIPB members and prospectives. General discussion. It's considered polite to always use an instance when sending to *-c sipb*. <u>High traffic.</u>
+
+* **<sipb-door,\*,\*>** - Receives a zephyr whenever SIPB's office door opens or closes. Great way to keep track of whether the [[office]] is open or not.
+
+* **<sipb-auto,\*,\*>** - <u>High traffic.</u> Receives a variety of automatically generated zephyrs, including...
+ * **<sipb-auto,sipbmp3,\*>** - Activity on [sipbmp3](http://http://sipb.mit.edu/sipbmp3/)
+ * **<sipb-auto,sipb-door,\*>** - See **<sipb-door,\*,\*>** above
+ * **<sipb-auto,sipb-www,\*>** - Commit logs when changes are pushed to this website.
+ * **<sipb-auto,backups,\*>** -
+ * **<sipb-auto,nagios.stuff.HTTP,\*>** -
+
+## Classes for SIPB Projects
+
+In general, you should only sub to these classes *if and only if*
+you're interested in helping with a specific project.
+
+* **<scripts,\*,\*>** - If you're interested in getting involved
+with [Scripts](http://scripts.mit.edu/), subscribe here to see what
+the Scripts team does behind the scenes. <u>High traffic.</u>