The assigned letter or number following the departmental designation indicates the appropriate level of instruction for each course: A, B, C, etc. special noncredit courses. 1-99 nonbaccalaureate-level courses. 100-199 freshman courses. 200-299 sophomore courses. 300-399 junior courses. 400-499 senior courses. 500-599 post baccalaureate. 600-699 graduate courses. (Some are dual-listed with 400-level courses having a graduate component.) 700-799 graduate courses.