Is there s/w to send terminal output to many terminals (windows)?

[Gerald Justice]

I need to be able to display an interactive terminal or window session on many
terminals or workstation windows (Suns).  This will be used for an instructive
demonstration.  The obvious alternative is one of these LCD units that are
used with an overhead projector (which I don't have) but I would prefer the
"session broadcast" approach if it is possible.  Does anyone have such a
tool?  What are universities/colleges using these days for demonstrations to
medium or large size groups?

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