This document discusses personality and how it is determined by both hereditary and environmental factors. Personality is described as the dynamic organization of psychophysical systems that determine a person's unique adjustment to their environment. Personality traits can help with employee selection, career development, and matching people to jobs. Two approaches to measuring personality are described: the Myers-Briggs Type Indicator and the Big Five personality traits. Various methods are also listed for measuring personality through self-reports, observer ratings, and projective tests.