The document defines personality and discusses several aspects and theories of personality that are relevant to organizational behavior. It describes personality as consisting of unique characteristics that make individuals different from each other. It then discusses several personality traits like locus of control, self-esteem, risk-taking propensity, and positive/negative affect that influence behavior in organizations. The document also summarizes several theories of personality like trait theory, psychoanalytic theory, social learning theory, and the Big Five model. It concludes by describing different personality types like Type A/B and Holland's personality-job fit theory.