This document discusses communication and defines it as the transfer of information from one person or group to another. It outlines the key elements of communication as a sender, message, and recipient. It then categorizes different types of communication such as verbal, non-verbal, and written and discusses channels of communication like face-to-face, email, and television. The document also examines barriers to effective communication and qualities of a good communicator. Finally, it briefly touches on systems of communication like downward, upward, horizontal, and diagonal.