The grades S (superior) or P (passing) are used in place of grades A or B respectively for individual studies courses numbered 591, 593, 594, 599, 691, 693, 694, 699, 791, 793, 794, 799, 900, 908, 909, 910, 915, 920, and 925. The only grades available in the courses numbered 599, 699, and 799 are S, P, C, D, E, I, and W. For courses numbered 595, 596, 695, 696, 795, and 796, the instructor may use these special grades or the regular letter grades according to departmental policy. Grades available for 900 are S, P, C, D, E, K, and W. The only grades available for 908, 909, 910, 915, 920, and 925 are S, P, E, K, and W. The only grade available for 930 is K. Special grades (S, P) are not used in the computation of the grade-point average.