This simple book is written for engineers and scientists and students with a focus on the biopharmaceutical industry. It contains practical engineering tools and concepts useful for design, resolving operational problems, and development of biopharmaceutical processes. It presents several examples on how the theoretical concepts apply to the industrial world in a simple and practical way. The contents are presented in a simple format. A practical theoretical concept is briefly reviewed, followed by example problems of practical applications . The information is organized into fifty small sections with applications for unit operations utilized in the biopharmaceutical industry; Chromatography, Homogenizer, Centrifugation, Tangential Flow Filtration, Dead End Filtration, Dryers, and miscellaneous unit operations.