Professions have adopted ethical codes and codes of conduct. Physicians, lawyers, engineers, and other professionals have moral responsibilities. They know to whom they are responsible. Professionals in the data processing field, too, need to know that they have moral responsibilities and to whom they are responsible. This paper compares and evaluates the ethical codes of four major organizations of computer professionals in America. The analysis is done along the following obligations that every professional has: to society, to the employer, to (...) clients, to colleagues, to the professional organization, and to the profession.Professionals in the information technology field have no single, agreed upon code of conduct. In the US alone there are four organizations promoting four different codes. While some of the behavioral precepts are similar, others are not. People who are members of more than one organization may wonder how they should act in certain circumstances. Furthermore, computer professionals are not provided with any guidance for cases of ethical conflicts. (shrink)