regular course; regular program
Refers to the main, full-time course of study at a school, as opposed to part-time, evening, or preparatory courses.
this course; this department
Used to refer to the speaker's own course or department, often in formal or institutional contexts.
He is majoring in economics in the university's regular program.
Students of this department, please submit this document.
Compound of 本 (main, regular) and 科 (course, department). The meaning 'this course/department' arises from the use of 本 as a proximal demonstrative in formal contexts.