Following is the system of abbreviations and symbols used in the course listings that appear throughout this Bulletin. Part of each course number is an alphabetical prefix that indicates the University school, college, or program (first three letters) and the department (next two letters) in which the course originates.For example, CAS HI 102 indicates a course in the College of Arts & Sciences, Department of History.ourse descriptions usually offer a brief outline of the content of the course, any prerequisites or corequisites, the instructor, credit value, and semester the course is offered. Abbreviations frequently used are: