"text as the universal interface" is the thing that enables "packaging for both use and reuse", so it's not surprising that this is what they refer to. > Moreo

"text as the universal interface" is the thing that enables "packaging for both use and reuse", so it's not surprising that this is what they refer to. > Moreover, I don't think that this feature is unique to UNIX. It's not. It's not common though, and certainly Emacs Lisp code doesn't work at the OS level, it is trapped inside Emacs.