UC and CSU Course Eligibility Requirements
The University of California and California State University use the A-G system to decide eligibility for freshman applicants. This system requires (and recommends) specific courses in different categories (for example, "A" is the Social Sciences, "B" is English, and so on). To see the specific course requirements, look at the following links:
CSU: https://www.calstate.edu/apply/freshman/getting_into_the_csu/pages/admission-requirements.aspx
University of California: https://admission.universityofcalifornia.edu/admission-requirements/freshman-requirements/subject-requirement-a-g.html