<p>Physics > Biology = Mechanical Engineering > Computer Science > Math = Chemical Engineering = Electrical Engineering > Chemistry > Applied and Computational Mathematics = Engineering & Applied Science > Applied Physics > Geology (including Geophysics, Geochemistry, and Geobiology) = Astrophysics > Economics = Business, Economics, & Management > Planetary Science</p>
<p>This doesn’t include humanities and social science majors/minors that people take on as a second major or majors that have had only one person in the last decade or so. The Engineering & Applied Science category mainly encompasses people who are majoring in Aeronautical/Aerospace Engineering or Computation and Neural Systems, as far as I know. The Chemical Engineering option has four different tracks: Biomolecular, Environmental, Process Systems, and Materials.</p>