In this chapter, we will first speak about the purpose of this textbook. After that, we will introduce the definition of machines, kinematicsKinematics, and dynamicsDynamics along with each one’s importance in the modeling, simulationSimulation, and designDesign of machines. We are going to introduce and explain some machines in terms of understanding their assembly, functionalityFunctionality, and articulationArticulation through written explanation, graphicAnalysisgraphic representation (sketches and picturesPictures), and animated videos. These explained machines will be used throughout this textbook as applied examples for our kinematic and dynamic analysisDynamic analysis to helpHelp in the modeling, simulationSimulation, and designDesign phases. At the end of the chapter, we will outline the flow of this textbook as well as the outcomes that we expect to reach throughout its twelve chapters.