This document discusses different types of communication. It begins by distinguishing between informal communication with friends and family and formal communication in a professional setting. It then defines communication as the exchange of information, ideas, and knowledge between a sender and receiver. The document notes that communication plays a vital role in organizations and daily life, and that without communication an organization cannot survive. It outlines the basic process or cycle of communication, including a sender, encoding, channel, decoding, receiver, and feedback. It also discusses different types of verbal and non-verbal communication, including kinesics (body language), proxemics (physical distance), paralinguistics (volume, pace, pitch, etc.), and different levels of communication