Mailing lists
A mailing-list is a form of e-mail in
which a group of people (the subscribers) send and receive messages
through a central point of contact, which is called the "list server."
Widely used on the internet for discutions between people with common
interests, mailing lists can be turn into powerfull communication tools
between members of an organization.
Mailing lists do not require extra software for their users - the interaction is done by common e-mail software.