Choosing a career path or major can be confusing and overwhelming. One way to help narrow the choices is to find the right fit between your interests and the environment of a particular career path. Dr. John Holland’s theory places people loosely into six different groups based upon personality types and occupational interests. Because people are too complex to describe with a single theme, career assessments often provide a three-letter code, referred to as one’s Holland Code, that identifies the three areas of highest interests.