@ UWS, I do a Theatremaking major elective sequence within B Liberal Studies. Fellow students of Theatremaking also come from:
B Performance, Theory, Practice (Theatremaking)
B Arts
B Arts (Communications)
B Arts/ B Teach
B Education
The Theatremaking major sequence is very similar to Drama at high school. You do a mix of theory, performance, and production. Just like Drama, you don't focus on a single aspect, such as acting. At other institutions, Theatremaking could be called Drama (e.g. MacquarieU), Theatre (e.g. UNSW), Performance Studies (e.g. USyd), mostly also as major/elective sequences within an Arts or Education course. What exactly is taught will differ slightly between institutions of course. And there are also professional courses at other institutions such as Australian Film Television Radio School, NIDA, Australian School of Acting, etc.
So that's about as much info I can give on your Drama query.
On a scant general note:
Public Communications involves things within Advertising, Public Relations, and Journalism.
Media involves a variety of media production depending on the institution. At UWS, this is visual/film.
someone else should be able to expand on that.
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my thoughts exactly......