Harvard calls their fields of study "concentrations", not majors [0]. Thus, a CS concentrator is an undergraduate student who is majoring in CS. [0]: https://e

Harvard calls their fields of study "concentrations", not majors [0]. Thus, a CS concentrator is an undergraduate student who is majoring in CS. [0]: https://en.wikipedia.org/wiki/Academic_major https://en.wikipedia.org/wiki/Academic_major