This document provides an overview of key topics in business markets and business buying behavior. It defines business markets and explains how they differ from consumer markets. The major factors that influence business buyer behavior and the typical steps in the business buying decision process are outlined. Different types of business buying situations like straight rebuy, modified rebuy, and new tasks are defined. The participants in business buying centers and the major influences on business buyers, including environmental, organizational, and interpersonal factors, are also summarized. Finally, it distinguishes institutional and government markets and how buyers in those markets make purchasing decisions.