This document discusses nonverbal communication, which is communication through behaviors other than words such as gestures, facial expressions, tone of voice, and use of space. It describes the different functions of nonverbal communication such as reinforcing, substituting, or contradicting verbal messages. Various nonverbal codes are also explained like kinesics, oculesics, paralanguage, artifacts, proxemics, and haptics. The document concludes by discussing how culture, technology, and the situation can influence nonverbal communication.