windows originated very little: plenty of type-on-page metaphor predated it.
original was light mode: printer terminals. yes, green-on-black became normal in the mid seventies, and some amber-on-black. but even early lisp machines, the Alto, Smalltalk, W/X/Andrew interfaces, Next, etc - type-on-page, not serial-terminal-ish dark mode.
original was light mode: printer terminals. yes, green-on-black became normal in the mid seventies, and some amber-on-black. but even early lisp machines, the Alto, Smalltalk, W/X/Andrew interfaces, Next, etc - type-on-page, not serial-terminal-ish dark mode.