At FORTH, Inc. in the 80s they programmed the keyboard to make the arrow keys (and such) macro-expand into editor-vocabulary commands. So the Forth-repl editor

At FORTH, Inc. in the 80s they programmed the keyboard to make the arrow keys (and such) macro-expand into editor-vocabulary commands. So the Forth-repl editor had interactivity sort of halfway between ed and Emacs. (Related anecdote: my summer job there back then was to review the new version of their system to find bugs, etc. There was this one piece which was ugly and awkwardly coded, and I was kinda happy to find it: finally, an excuse to rewrite something! It was the conventional interactive editor. Turned out it had been contributed by a customer; absolutely nobody at the company used it. Forth editor all the way.)