This document provides an overview of communication including: the introduction defines communication; the process includes ideas, sender, message, encoding, medium, channel, receiver, decoding, and feedback; features are that communication is continuous, universal, unavoidable, social, dynamic, selective, and purposeful. It also discusses models of communication, theories of communication, barriers to communication such as semantic, personal, organizational, emotional, physical, and cultural barriers. Finally, it provides ways to overcome communication barriers such as clarity of purpose, clarifying ideas, overcoming language differences, active listening, having an open mind, and attitude.