This document discusses different types of speech styles according to linguist Martin Joos. It identifies five main speech styles: intimate style used among close friends and family, casual style used among acquaintances, consultative style used to exchange information between strangers, formal style used to impart information directly and without interruption, and frozen style that is static, ritualistic and potentially archaic. Speech style refers to distinctive patterns of language, voice and nonverbal behaviors that vary based on the situation and people involved in communication.