This paperback is a compact, comprehensible, and practice-oriented overview of process engineering. It presents all subfields—mechanical process engineering, thermal process engineering, chemical process engineering, and biological process engineering—in a clear and organized manner. Additionally, specific applications from various areas of industry and environmental technology are discussed as examples. It serves as a compact, interdisciplinary reference work on all topics related to process engineering, with examples from industry and environmental technology. The presentation is practical and illustrative, offering valuable guidance for career orientation for students and graduates with a focus on process engineering. It is excellently suited to support the resolution of process engineering problems, to review educational material, and for exam preparation.