An engineer is a person who works in engineering. The word engineer is derived from the Latin root ingenium, meaning "cleverness".[1] Most engineers learn their work in engineering schools. They design materials, structures, machines and systems while considering the limitations imposed by practicality, safety and cost. Much of the work is applied science, using information given by scientists to do their work. Apart from working with things, an engineer must also be good at working with people and money.[2]