Engineering is a large scientific branch focused on invading practical designing and building of structures or machines allowing the scientific principle along with mathematical formulas to be applied for calculating required specific dimension in order to form the Infrastructures, Mines, Ships, Aircrafts, Electrical equipments, Roads, Vehicles, and Bridges. 

There are many subspecialities from aerospace engineering, chemical engineering, computer engineering to environmental engineering. There is still a strong demand for traditional fields such as civil and petroleum engineering, but the fastest-growing occupations are those in close relation to technology. Engineering services will be essential to various areas such as rebuilding infractures, renewal energy, oil and gas extraction and robotics.

Becoming an engineer the students should not only have to study about engines but also have to study about different kinds of mechanical systems and equipments, that imphasizes and evaluate the level of perfection from the buttom to the top without any threads and doubts in compeling the internal crafts, structures, layout and complete designing of the fields/things.