http://en.wikipedia.org/wiki/Second_Coming
Pre.. are the folks who espouse that the second coming will be before the 1000 reign of peace, and Post... are the folks who believe it is after.
In fact, second coming is never used in the Bible, but that does not prevent folks from preaching on it in diverse ways. See Timing in the link I gave you. There are many, many thoughts on this.
Can I have info on premillenarianism as opposed to the alternatives?
2 answers
Well, the whole book of Revelations is about A coming. It's never specified if it already has come or not. Unless I misunderstood you. I think that it's not preaching diversly one way or another, for either pre or post, because no one really knows. Thanks for the link!