"Star Trek: The Original Series" was originally just "Star Trek", as there was nothing else, and it was labelled "The Original Series" to distinguish it from the overall franchise that followed. But where did that term "Original Series" come from, and when did it start being referred to as that? It's probably taken for granted that it was labelled "The Original Series"; it could have been called something else, albeit with the same idea (and amongst the ones I know is "Classic Star Trek"). So who is the guy or group that came up with and applied that term?