There are three categories of personality disorders, based on the types of behavior associated with each condition. Cluster A personality disorders include paranoid personality disorder, schizoid personality disorder, and schizotypal personality disorder. Cluster B personality disorders include antisocial personality disorder, borderline personality disorder, histrionic personality disorder, and narcissistic personality disorder. Cluster C personality disorders include avoidant personality disorder, dependent personality disorder, and obsessive-compulsive personality disorder.