What is a magic number?
A magic number is a number used by one student that allows the student to register for a specific course. The magic number is used when the instructor chooses to allow a student to register for a class to which the normal registration system has denied access. For example, if a student has met the pre-requisite (or equivalent) courses for a class but the computer system does not recognize the pre-requisite, then the student may want to ask the instructor for a magic number.