The number of credits appearing on course records and registration cards may be preceded by a letter prefix as follows:
E.
Course excluded from credit toward a degree; all course
requirements must be completed and a regular grade is assigned.
G.
A 300- or 400-level undergraduate course for which credit toward the graduate degree sought has been approved.
N.
Course taken "not for credit." The final examination is not
required. A final grade of S (satisfactory) or U (unsatisfactory)
is assigned. Graduate students registering for undergraduate courses
are subject to the credit prefix rules of the undergraduate division
offering the course.