Mechanical engineering involves designing, developing, building, and testing machines. This document discusses the future scope and career opportunities in mechanical engineering. It notes that mechanical engineers may work in design, research and development, or production. They can pursue careers as design engineers, CAD designers, CAE engineers, draughtsmen, quality managers, and production managers. The document also lists related fields like materials engineering and physics. It provides examples of post-graduate studies and specialization courses for mechanical engineers to further their careers.