A degree is a title given by an institution (usually a college or university) that has been granted the authority by a state, recognized Native American tribe, or the federal government to confer such degrees. Generally, degrees are provided for accomplishment in academic, vocationally related, or religious studies, and the degree requirements differ within each of these three realms but are presumed to be comparable in accomplishment. A degree is granted by an institution to individuals who are presumed or who have been attested to have satisfactorily completed a course of study from which the individual can demonstrate the knowledge, skills, and ability commensurate with the degree requirements within the specific field of study. Degrees vary in the level of knowledge and skills that holders of the degree are presumed to have.