1. Law: Harvard Law School is one of the top law schools in the world, and its law major enjoys a high reputation in the world. Harvard Law School graduates have great influence in the legal field, including many American presidents and several Supreme Court justices.
2. Business: Harvard Business School is one of the top business schools in the world, and its MBA program is known as "Harvard of business". Graduates from Harvard Business School hold important positions in large companies and financial institutions around the world.
3. Medicine: Harvard Medical School is one of the top medical schools in the United States, and its medical research and education enjoy a high reputation in the world. Harvard medical school graduates hold important positions in major medical institutions and research institutions around the world.
4. Psychology: Harvard Psychology Department is one of the top psychology departments in the world, and its psychological research enjoys a high reputation in the world. Graduates of Harvard psychology department hold important positions in major research institutions and educational institutions around the world.
5. Economics: Harvard Economics Department is one of the top economics departments in the world, and its economic research enjoys a high reputation in the world. Graduates of Harvard Economics Department hold important positions in major economic institutions and policy-making institutions around the world.
The above five majors can be said to be the "trump card" majors of Harvard University, but it should be noted that other majors of Harvard University also have high popularity and influence, such as political science, sociology, history and literature.