Use of a Mouse with a Terminal

[Robert R. Kessler]

We operate a number of Xenix systems each which uses a large number of
terminals (standard 80x24 displays).  We are contemplating improving
our user interface to include windows, menus and the like and are
interested in writing mouse-based applications.  Does anyone know of
anything that would allow us to use a mouse with a terminal?

Thanks.
B.