The Orchid House
A mailing list provides a simple means of communicating with a large number of individuals having a common interest. A mailing list server maintains a list of the email addresses of all the subscribers to the list. When a subscriber sends email to the mailing list server, the server automatically forwards the email to all the email addresses in its list. The recipient can then repy to the message, writing back to the mailing list (so everyone gets a copy again) or can reply privately to the sender's regular email address.
Some of these lists are relatively inactive.
Below are some of the discussions groups that can be found at Yahoo