This textbook introduces the readers to AutoCAD plant 3D 2018, one of the of the world's leading applications designed specifically to create and modify P&IDs and plant 3D models. In this textbook, the author emphasizes on the features of AutoCAD plant 3D 2018 that allow the users to design piping and instrumentation diagrams as well as 3D piping models. The chapters in this textbook are structured in a pedagogical sequence that makes it very effective in learning the features and capabilities of the software.