Abstract
Among sciences including natural science, social science, and humanities, what role will be played by johogaku, information science? The author suggests a new concept that sciences can be classified in types of A series and B series. While A series are many of sciences commonly studied, B series are some special type of sciences such as mathematics, philosophy, law, and linguistics, whose characteristics are combinability with various sciences of A series. Johogaka, Information science can be characterized both A and B series. The author named the former "informtics" and the latter "informatology". This will be useful as an approach in study of the essence of johogaku, information science.
