Mechanical Engineers are involved with the conception, design, manufacture, control, maintenance and management of any system in which motion is a key feature. The system may comprise moving solid elements - components - combined to create a mechanism or machine. Alternatively, it may involve a fluid flowing within or around a solid structure.
Mechanical Engineering permits us to harness the energy and forces that exist in Nature, providing for the needs of society. The range of Mechanical Engineering is therefore vast; machines from the size of micro-mechanical devices through to massive power-generating turbines are covered by the discipline. Similarly, the flight and performance of modern aircraft is largely an accomplishment of Mechanical Engineering.