Because it uses rectangles and text? The Symbolics UI looks&feels nothing like Emacs. Zmacs is just ONE application on it. Applications are not Zmacs buffer m

Because it uses rectangles and text? The Symbolics UI looks&feels nothing like Emacs. Zmacs is just ONE application on it. Applications are not Zmacs buffer modes. The shown applications, Listener and Peek are not Zmacs buffers or windows. Neither one uses Zmacs buffers/windows. If you look at the Listener application window: * it has no terminal mode * it has no minibuffer * it has no meta-x commands * it is fully graphical (postscript compatible drawing model) * you can't split it * it has no menubar * it has no iconbar * it has no modes, it is just a Lisp listener and a command interpreter * it is not an editor window and not an editor buffer, you can't edit the text printed to it * for each output it remembers the Lisp objects * for each input it can reuse the Lisp objects * since it is a window, you can resize/move it * you can only type commands and s-expressions to it, and they will be parsed online