An engineer is a specialist who invents, designs, analyzes, builds, and tests machines, systems, structures, devices, and materials, taking into account their practicality, safety, and cost. The challenge of engineers is to apply scientific discoveries to the needs of people and businesses.
Technological progress happened thanks to the representatives of this profession. Roads, bridges, trains, planes, ships, buildings, computers, telephones, all of those are the work of engineers.
The activities of engineers can be related to programming, biology, mathematics, chemistry, bioengineering, as well as military affairs, economics, ecology, and other areas. Accordingly, there are many engineering specialties: surveyor, designer, estimator, technologist, electronics, mechanic, electrician, power engineer, builder, designer, tester, electrical engineer, heat engineer, mechatronics engineer, ecologist, etc.