i would like about the emulation in workstations. thanks.
are you refering to vt100 terminal emulations in Unix system ?
check this link out
might help with the question that you asked.
http://sdcd.gsfc.nasa.gov/ESS/exchange/contrib/mobarry/t3d-pvm-emu.html
if that link dosent apply on what you are looking for pls post back. Also state you *nix variant.
What would you like to emulate?