The document summarizes the Keirsey Temperament Sorter (KTS), a personality assessment tool developed in 1978 based on Carl Jung's work. The KTS uses a 70-question questionnaire to assess individuals on four domains - how they are energized, how they perceive information, how they make decisions, and how they orient themselves - and assign them one of 16 temperament types. It then provides detailed descriptions of each of the 16 types to help people understand themselves and others to improve communication, teamwork, and personal and professional development.