Engineering is a collective term for the application of scientific principles for the design of structures or processes. It has many subspecialties depending on the nature of the engineering project; the largest fields of engineering are civil, electrical, mechanical, and industrial engineering.
Engineers with formal training and accreditation are called Professional Engineers; in Canada the accreditation organization is the Canadian Council for Professional Engineers. With the P.Eng designation, engineers are able to offer their professional services to the public and take legal responsibility for various engineering documents. To acquire this title, engineers must graduate with a degree from an accredited program in engineering or applied science, complete an interim engineering training program under an already-licensed Professional Engineer, and pass a professional practice exam administered by the CCPE.
Engineering as a discipline has a multitude of subspecialties (see subsequent articles). Depending on the subspecialty, it is related to physics, biology, chemistry, and computer science.