This three-part textbook is written for a two-semester polymer processing series in mechanical or chemical engineering. The first and second part are designed for a senior- to grad-level course introducing polymer processing, and the third part is for a graduate course on simulation in polymer processing. Throughout the book, many applications are presented in form of examples and illustrations. These will also serve the practicing engineer as a guide when determining important parameters and factors during the design process or when optimizing a process.