This document outlines the topics covered in 5 units of a course on decision support systems. Unit 1 discusses the roles of managers and reasons for computerized decision support systems. It also defines systems and decision support frameworks. Unit 2 covers decision making design phases, decision styles, and relationships between decision making and personality/cognition. Unit 3 provides an overview of decision support systems, their components and classifications. Unit 4 describes group support systems, tools, and processes. Unit 5 covers knowledge management, the knowledge management cycle, and systems related to learning organizations and culture.