Computers are a big part of engineering, because in order to make one,  you have to research, develop, design, and test various equipment. This is the basic idea of the engineering process. Also, they require specific parts and must be done orderly and properly.

Computer engineering is a discipline that integrates several fields of electrical engineering and computer science required to develop computer hardware and software. This field of engineering not only focuses on how computer systems themselves work, but also how they integrate into the larger picture.

The original article:  https://en.wikipedia.org/wiki/Computer_engineering

This is the motherboard of a DVD player. The result of computer engineering.

Here is a video on the basics of Computer Engineering: