[gumby]

I really liked the SUPDUP but that section describing it doesn't really get to the intense crockishness of the protocol. It really was ITS terminal control brought out over the network: the capabilities were the 36-bit terminal descriptors sent over the network in PDP-10 order.

DLW later wrote a different Emacs implementation in Lisp, Zwei, for the Lisp Machine, which was even more deeply intertwined in the system than Multics Emacs was in Multics. Zwei (Zwei was Eine Initially) followed Eine (Eine is not Emacs)

FWIW both programmers mentioned in that section, DLW (Dan Weinreb) and MRC (Mark Crispin), died relatively young.