Mechanical engineering deals with forces and motion and includes designing, analyzing, and maintaining mechanical systems. James Watt improved the steam engine in the 18th century and is considered the founder of mechanical engineering. Mechanical engineering is a broad field that works with energy, forces, and materials across many industries. Examples of mechanical engineering jobs include design, manufacturing, maintenance, research and development, project management, and more. Early applications included pumping water, draining mines, building structures, and designing scientific instruments, while current areas of research include acoustics, automation, bioengineering, and more. Mechanical engineers play a key role in transportation and are working on making aviation more environmentally friendly.