In this chapter, we have covered a brief history of 3D printing, including a generalized introduction to the different processes of 3D printing. We covered the birth of MakerBot and learned about the wide usability of 3D printing in everything from medicine to food. Next, we learned about our MakerBot Replicators' specifications, and we touched on some of the limitations that these impose. We ended by talking about the most common material choices, leading into the next chapter, where we will learn briefly about solid modeling and designing to print on the MakerBot Replicator.