<p>I can’t answer all your questions but here’s what I know.
When you apply to NYU as an undergraduate, you must apply to one of their schools.
CAS (college of arts and science) is the biggest and most popular school with the most majors. It has all types of liberal arts and science majors.
Tisch is the arts school for those interested in film, drama, etc. It is highly competitive.
Stern is the business school, and is easily the hardest school at NYU to get into. You need to have very strong SAT scores.
There are plenty of other schools, but these are 3 of the big ones. You apply and are accepted to one of these schools on the common app. Internal transfers are possible but not super easy.</p>
<p>You can also attend Stern as a graduate school to get an MBA.</p>