Thanks for the reply, lispm.

> Lisp Machines from Symbolics, LMI and TI were later based on the hardware and software from the MIT, but they used new processors and the OS was extended.

Ok, after some more reading, I think I'm getting the picture. Genera was the OS on the Symbolics Lisp machines, and the MIT Lisp machines ran some other similar OS. Genera's roots though were in the code from MIT.

> Kent said that he implemented things in TECO that people thought were possible only on the Lisp Machine.

Right. I don't get this. If he's a fan of Lisp machines, why bother spending time implementing solutions to tough problems in TECO instead of whatever Lisp his Lisp machines were running?