How to say it in professional English?

The "major" in the university is translated into English: major? ; ? Occupation?

Professional English? Professional English; Professional English; Professional English; Mechanical English

Law major? Legal profession; Law; Personal statement; ZBF

Professional ethics? professional ethics

College (school discipline classification); Special research fields; Major; Discipline:

The department offers four majors.

There are four majors in this department.

References:

How to say professional English-Youdao dictionary