"major area of study" is correct and usable in written English.
For example, "My major area of study is sociology."
The results showed sharp variations by demographics and major area of study.
A major area of study in computer science has been the storage of data for efficient search and retrieval.
There was a common core of subjects plus electives in grades 10 and 11, but all subjects were oriented to the pupil's major area of study.
Some others extend their student visa for a year of work "directly related to [their] major area of study," under the Optional Practical Training program, according to the U.S. Citizenship and Immigration Services Web site. .
The third section of the questionnaire consists of seven demographical items to collect information on the participants' gender, age, home province, years of learning English, years at university, major area of study, and perceived level of English proficiency.
The role of inflammation in autism is now a major area of study.
One of the major areas of study offered by the college is education, and a special feature of the show was the participation of schoolchildren from the New London area in early stages of the exhibition.
Frequently, symptoms can be alleviated by drugs, and the discovery, mode of action, and degradation of therapeutic agents is another of the major areas of study in biochemistry.
The Evangelical Christian school, about an hour west of Washington, will offer six or seven major areas of study, including government, and teach classical subjects and "values popular and commonplace among home schoolers," said Mr. Farris, himself the father of 10 home-schooled children.
In particular, the page replacement policy in this hybrid main memory has been one of the major areas of study.
The program was developed through an iterative needs assessment process and consisted of 7 major areas of study and skill development: principles of adult learning; teaching skills; feedback and evaluation; the workshop as a teaching and faculty development tool; curriculum development, implementation, and evaluation; research in medical education; and scholarship and promotion.
