Mechanical Engineering is one of the core branch of engineering that applies engineering, physics and material science principals to design, analyze, manufacture and maintain mechanical systems.
Computer is also one of the popular course of engineering. It integrates several sections of computer science and electronic engineering for developing computer hardware and software.
Electronics engineering is a part of electrical engineering and a study of various principles and practical aspects related to designing.
Working with bricks and mortar is a civil engineering professional. Although the field is different from the rest.
Electrical engineer is of the core departments of engineering that deals with design, development and maintenance of electrical systems.