Keep in mind that although you can pursue courses in one of those areas, your career path might be very different. With that in mind, I've just mentioned the "classic" areas that an MBA grad might go into.
General Management -- GE's rotational program -- general manager's cover a little bit of marketing, a little bit finance, etc. The eventual goal is to get profit and loss responiblity. In my mind, the ultimate general management position is that of brand manager -- but those who pursuse that route tend to have marketing backgrounds. Most of the top ten schools are general management schools in that you are not required to major in one field.
International Business -- same as general management just on an international scale -- typically joined with another business focus like marketing or finance
Operations Management -- process flows and statistical analysis -- you're most likely going to go work for a manufacturer and focus on production.
Quantitative Analysis -- specialized finance. Could go to anything from insurance companies and analyzing risk to hedge funds.
Strategy -- Consulting... that's about it.