* Certain languages: While some languages like Spanish remain popular, less commonly taught languages (e.g., some Slavic languages, less frequently offered Asian languages outside of Mandarin or Japanese) often have very small numbers of majors. Popularity is also heavily dependent on the specific university offering the program.
* Some humanities specializations: While the humanities as a whole have seen declining enrollment, niche specializations within those fields (e.g., certain areas of Classics, medieval studies, some art history subfields) often attract very few students. Again, this is highly dependent on university offerings and faculty expertise.
* Certain engineering specializations: While engineering as a whole is popular, some very specific, highly specialized branches may have comparatively low enrollment. This can be due to demanding prerequisites, specialized equipment needs, or limited career paths perceived by students.
* Some agricultural specializations: While agriculture is generally important, very specialized fields within the area may have limited student interest.
It's important to note that "least popular" doesn't necessarily equate to "worthless" or "unsuccessful." Small programs may offer highly specialized skills sought after by niche industries. The demand for a major and the resulting career prospects are far more important considerations than sheer enrollment numbers.