+
+## Other Useful Classes
+
+These are not SIPB-related classes, although many people affiliated
+with SIPB and/or IS&T listen to them. In general, you should not send zephyrs to
+any of these classes.
+
+* **<consult,\*,\*>**
+
+* **<filsrv,\*,\*>**
+
+* **<3down,\*,\*>**