G'day Joe,
[aaargh, top-poster! Get 'im!]
Sorry to be a geek, but 4 series? It must be more than that. 3 TOS, 7 TNG, 6/7 DS9, around 4 VOY.
Americans call a programme's series a "season", and the programme itself a "series". It actually makes sense. Australians tend to use an inconsistent mix of American and British terminology in this regard; personally (and this is one of the few cases you'll hear me say this), I prefer the American version: /Star Trek/ is divided up into series, each of which has many seasons ...
And before TNG but after TOS, we had TAS --- /Star Trek: The Animated Adventures/. No, I didn't watch it either. I read some comic books (sorry, sorry: "graphic novels") based on it, though.
I wonder if this divide has lead to any confusing articles on Wikipedia?