Electives can be any course from any category. The choice of electives is limited however to those courses that are listed on the course planning for a specific quarter or term, and that are scheduled at a certain campus during that period. The scheduling of courses is based solely on the enrollment of students for certain programs and specializations. The more different programs and specializations students enroll for, the more different courses, and thus electives, will be available. Should all students have enrolled for the same program or specialization, a limited number of courses can be scheduled based on the preferences of enrolled students and the availability of professors.