This document provides an overview of the DiSC behavioral model. It discusses the history of behavioral styles dating back to Hippocrates. The DiSC model evaluates how individuals interact with others based on their preferences along the dimensions of Dominance, Influence, Steadiness, and Conscientiousness. Each style - D, i, S, and C - is described in terms of their priorities, motivations, values, and fears. The document concludes with tips for effectively communicating with each of the four styles.