The text is divided into three parts with nine chapters. Part One, Principles of Modeling and Simulation: A Multidisciplinary Approach introduces modeling and simulation and its role. Chapter 1 answers the question, “What Is Modeling and Simulation?” The chapter provides a brief history of modeling and simulation, lists the many uses or applications of modeling and simulation, and speaks to the advantages and disadvantages of using models in problem solving. Chapter 2 focuses on “The Role of Modeling and Simulation”. It covers the two main reasons to employ modeling and simulation: solving a specific problem, and using modeling and simulation to gain insight into complex concepts. Part Two, Theoretical Underpinnings, examines the most fundamental aspects of modeling and simulation. Chapter 3, “Simulation: Models That Vary over Time’ provides a definition for simulation and introduces the reader to two main simulation concepts: discrete event simulation and simulation of continuous systems. Chapter 4, “Queue Modeling and Simulation” examines queuing models, sequential simulation, and parallel simulation. Chapter 5, “Human Interaction with Simulations” explains the two primary methods in which humans interface with simulations: simulation and data dependency and visual representation. Chapter 6, “Verification and Validation” answers two fundamental questions: What is verification and validation? and Why is verification and validation important? Part Three, Practical Domains, affords the student an opportunity to consider the many uses of modeling and simulation as a tool in workforce development. Students will also review case studies and research conducted in various disciplines emphasizing the notion that models serve as approximations of real – world events. Chapter 7 addresses the “ Uses of Simulation. ” These uses are found in training, analysis, decision support, and acquisition. Chapter 8, “Modeling and simulation: Real – World Examples” delves into specific applications of modeling and simulation in the Transportation, Business, Medical, and Social Sciences domains. Chapter 9 addresses “The Future of Simulation” by providing a basis for accepting modeling and simulation as a discipline with its own body of knowledge, research methods, and curriculum of study. It provides answers to the questions: Is modeling and simulation a tool or discipline? How should education, research, and training be conducted to support workforce development?