"A classification scheme is given for materials related to occupational and educational opportunities collected by the Rutgers College Placement Office Library. The scheme assigns a four digit number to each item. The first digit designates which of the library's general areas the material covers: general, occupational, educational, or one of the special areas to be designated in the future. The second and third digits broadly and then more specifically define the educational areas dealt with or assumed as the background for the occupation covered. The fourth digit indicates geographic location. The classes are listed and defined, provisions for expansion are indicated, and class numbers are given for 74 occupations."