+ * _sipb-machine-room-access_: Reflects who has card access to SMR. Maintained by the Vice-Chair. Generally, email before granting card access to give people a chance to object before you do so.
+ * _sipb-ec_: reflects the current members of the EC, plus [an archive visible to all SIPB members](https://diswww.mit.edu/charon/sipb-ec/).
+ * _sipb-ec-people_: Is a non-archived version of _sipb-ec_ that is solely for emergencies and for use by the EC for discussing sensitive issues.
+ * _sipb-discussion_: general discussion list. Generally little-used, but a decent place to move contentious discussions to from sipb-office if they continue for a long time. Members should feel free to add themselves. Prospectives should ask a member to be added.