This document discusses verbal and nonverbal communication. It identifies two main symbol systems: verbal communication uses words, while nonverbal communication refers to human attributes and actions other than words that have shared meanings. Nonverbal communication can reinforce, negate, remove, emphasize, or supplement verbal messages. It then categorizes and defines different types of nonverbal communication, including facial expressions, eye behavior, kinesics, physical appearance, proxemics, paralanguage, chronemics, haptics, olfaction, and silence.