Do you have any clues about which DEC system it might be drawing these other elements from? I mean specifically: - FCBs. - A command interpreter prompt endin

Do you have any clues about which DEC system it might be drawing these other elements from? I mean specifically: - FCBs. - A command interpreter prompt ending in ">" rather than "*" or ".". - 8-character filenames (rather than 6). - ASCII filenames (rather than RADIX-50). - Drive letters. - PIP switches in square brackets rather than introduced by slashes. (Some TENEX programs evidently enclosed their switches in parentheses, but the ones I've seen so far don't use square brackets.) - Launching programs from the command interpreter with command-line arguments, like Unix. Maybe Kildall thought all these things up himself, but I suspect some previous DEC OS was their origin. But it isn't RT-11, TENEX, the DEC 10/50 monitor, TOPS-20, or VMS. I want to emphasize I'm not claiming that these are advances or innovations. I'm just saying that they suggest some other influence.