1-49: Non-credit educational experiences 50-99: Pre-baccalaureate university credit courses of a preparatory, developmental or semiprofessional nature. Courses are not applicable to degree requirements. 100-299: Lower-division undergraduate courses that are general and introductory. They are intended to provide a foundation for advanced work. 300-499: Upper-dividision undergraduate courses that generally assume prior knowledge and experience in the subject, with content move advanced or specific than lower-division courses. 600+: Graduate level *from 2011-2012 catalog