h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

This is one very large group of students which you have neglected to include. Of course, they're not seen very often, not because they don't actually exist but because they rarely feel sunlight, let alone get drunk. They are not, therefore (according to this article's definition) students. They are also guaranteed not to become middle managers or executives.

and archaeologists were missed out too.

i walked down the corridor in arch dept once. the guy inn fron thad on a three piece suit, a lab coat and very muddy hiking boots. and it wasnt because he hadnt done his washing....