部 (bù): department, part; measure word for books, machines, etc.

He works in a department of the government.

This department is responsible for handling customer complaints.

The company has many departments, such as sales, personnel, etc.

I take the bus to work at the Ministry of Foreign Affairs every day.

This book is divided into three parts.

I watched a very good movie.

He is the manager of our department.

This army unit is well-trained.