100-199
Courses generally designed for freshmen, but may be appropriate for sophomores; also an introductory or first course taught in a sequence with in a specific discipline.
200-299
Courses generally designed for sophomores, but which may be appropriate for freshmen; also with in a department sequencing, advancing in a progression as a second course which may require previous knowledge or training.
300-399
Courses generally designed for juniors and seniors, but may be appropriate for sophomores; prerequisites are often required for this level of course.
400-699
Courses generally designed for juniors and seniors advancing well into upper division work with prerequisite knowledge base required.
700-999
Courses for graduate students; some upper level undergraduates can enroll in 700-799 courses.