This document provides information on communication including definitions, elements, functions, forms, models, processes, barriers and types of noise. It defines communication as the exchange of information, ideas, attitudes and emotions between people using symbols. The key elements are a sender, message, medium, receiver and feedback. Functions include informing, persuading and relationship building. Forms include intrapersonal, interpersonal, group, public and mass communication. Models described are linear, interactive and transactional. The communication process involves encoding, transmitting and decoding messages. Barriers can be organizational, individual or due to noise such as physical, psychological or semantic disturbances.