* Major: This is the most common term, particularly at the undergraduate level. It refers to the primary subject of study.
* Concentration: This often refers to a more specialized area of study *within* a major.
* Specialization: Similar to concentration, this highlights a focused area of expertise.
* Area of study: A general term encompassing the subject matter a student is focusing on.
* Field of study: A broader term than area of study, often referring to a larger discipline (e.g., the field of biology).
* Discipline: This refers to a branch of knowledge, typically with its own established methods and approaches (e.g., the discipline of history).
* Research focus/interest: This is more commonly used in graduate studies or professional contexts, describing the specific topic of research.
The best term to use depends on the specific educational level and institution.