Engineering is a profession that involves applying science and mathematics to make products or processes that benefit people or society. Engineering is a field so diverse that many people are unsure what engineers actually do. Nearly all engineers specialize in one of the more than 25 fields of engineering based on their individual interests.
Mechanical engineers specialize in converting energy into a useful form.
Examples are designing automobile engines, generating electrical power, and designing refrigeration systems. Civil engineers are the builders of the engineering world. They design and construct buildings and facilities such as dams, bridges, and tunnels. Other common specialties are bioengineering, chemical, aeronautical, environmental, agricultural, materials, nuclear, petroleum and natural gas, and mining engineering. Engineering is a very large field.