1) Alumni groups 2) Brown catalog listing 3) Business and tourist 4) Campus divisions 5) Campus groups 6) Categories 7) College reunion groups 8) Courses of study 9) Curriculum components 10) Curriculum listings 11) English and french, for two 12) English and math 13) Groups of students 14) Marxist groups Found on https://www.crosswordclues.com/clue/classes
(from the article `sociology`) For example, Eric Olin Wright, in Classes (1985), introduced a 12-class scheme of occupational stratification based on ownership, supervisory control ... Found on http://www.britannica.com/eb/a-z/c/93