To unsubscribe from the mailing lists, fill in your e-mail address, select the lists you want to unsubscribe, and do it. This lets you unsubscribe from a list even though you can no longer send e-mail from that address. Please do not unsubscribe anybody else.
This form no longer allows one to subscribe, since there were a couple of people who wanted to subscribe all their enemies. As a result, we only perform unsubscriptions. If you wish to subscribe to a list, send a message to "list-request" where "list" is the mailing list name (e.g., patterns-request) and put "subscribe" in the subject (not body) of the message.