An engineer is a practitioner of engineering, concerned with applying scientific knowledge, mathematics, and ingenuity to develop solutions for technical, social and commercial problems. Engineers design materials, structures, and systems while considering the limitations imposed by practicality, regulation, safety, and cost. The word engineer is derived from the Latin words ingeniare ("to contrive, devise") and ingenium ("cleverness").
The work of engineers forms the link between scientific discoveries and their subsequent applications to human needs and quality of life.
There are many branches of engineering, each of which specializes in specific technologies and products. Typically engineers will have deep knowledge in one area and basic knowledge in related areas. For example, mechanical engineering curricula typically includes introductory courses in electrical engineering and software engineering.
When developing a product, engineers typically work in interdisciplinary teams. For example, when building robots an engineering team will typically have at least three types of engineers. A mechanical engineer would design the body and actuators. An electrical engineer would design the power systems, sensors, and control circuitry. Finally, a software engineer would develop the software that makes the robot behave properly.
Source: Engineer from Wikipedia
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