Mathematics, logic, astronomy and astrophysics, earth science and space science, physics, chemistry, life science.

Sub-disciplines are as follows:

Mathematics: algebra, geometry, operations research, functional analysis, computer science, statistics, topology, etc.

Logic: logic application, deductive logic, general logic, inductive logic, methodology, etc.

Astronomy and astrophysics: cosmology and cosmology, astrology, radio astronomy, solar system science, etc.

Earth science and space science: atmospheric physics, geodesy, hydrology, oceanography, land science, space science, etc.

Physics: acoustics, electromagnetism, electronics, nuclear physics, etc.

Chemistry: analytical chemistry, inorganic chemistry, nuclear chemistry, physical chemistry, etc.

Life sciences: zoology, natural anthropology, biochemistry, biomathematics, biostatistics, ecology, genetics, etc.