He is an expert in computer science.

Computational geometry is an important field of computer science.

He is studying late into the night to learn a new computer language.

I analyze data using a spreadsheet software.

The time complexity of this algorithm is O(n).

The space complexity of this algorithm is O(n).

Excuse me, may I come in?

He thought he was smart, but he remembered the proverb 'a fool may give a wise man council', and understood the importance of listening to others' opinions.

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