He was able to solve the complex calculation quickly.

He was calculating in his head.

He is an expert in computational linguistics and is involved in the development of artificial intelligence.

He is a very excellent technician.

The advancement of science and technology has greatly changed our lives.

He is good at solving technical problems.

Information technology plays a very important role in modern society.

This bottle is reusable.

Who is the user of this software?

He is the most competent employee of our company.