Engineering is the creative application of science, mathematical methods, and empirical evidence to the innovation, design, construction, operation and maintenance of structures, machines, materials, devices, systems, processes, and organizations. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application. See glossary of engineering.
Mechanical engineering is the discipline that applies engineering, physics, engineering mathematics, and materials science principles to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering disciplines.
There are many good mechanical engineers; — there are also many good " businessmen ;"— but the two are rarely combined in one person.
Henry R. Towne, "The Engineer as an Economist," In: Proceedings of the Chicago Meeting (25-28 May 1886) Transactions of the American Society of Mechanical Engineers (1886), 7, p. 428