This document defines communication and describes the communication process. Communication is defined as the process of passing information from one person to another. The communication process involves a sender encoding a message and transmitting it through a channel to a receiver who decodes the message. The document also discusses formal and informal communication, verbal and nonverbal communication, barriers to communication, and techniques to overcome barriers. It describes upward, downward, and horizontal communication in an organizational context. Finally, it discusses passive, aggressive, and assertive communication styles for nursing administrators.