On  4 Feb 97, I wrote:

> Why not make List A a super-list which includes list B as a sublist?
>
> Then you subscribe people to either List A or List B. When you send
> mail to List A it goes to both sets of subscribers; when you send to
> List B it only goes to List B. Replies should work as needed.
>

I guess I ought to have mentioned that super-lists are a new feature
in 1.8c.

Francoise