It really varies i think. When I took CS as a major, we came across threading in multiple classes but prominently in Operating Systems and Software Engineering.

It really varies i think. When I took CS as a major, we came across threading in multiple classes but prominently in Operating Systems and Software Engineering. Some earlier data structure classes had assignments (Java/C++) where we had to write games using threading. I even remember that in one of the earlier game assignments, threading was a bonus point if used.