Engineering — the academic and practical study of designing and applying technology (e.g., mechanical, electrical, civil engineering).
彼は大学で工学を専攻している。
He is majoring in engineering at university.
工学の知識は製品開発に役立つ。
Engineering knowledge is useful for product development.
その研究は材料工学の分野に属する。
That research belongs to the field of materials engineering.