This document discusses the history and concepts of communication. It begins by describing how communication has evolved from early humans painting on cave walls to modern paper-based writing. It then defines communication as the exchange of information between a sender and receiver using an accepted language code. The document outlines the basic process of communication, including encoding a message, transmitting it through a medium, decoding it, and providing feedback. It distinguishes between verbal communication using words and non-verbal communication using gestures and body language.