1. According to universal attributes, it is divided into humanities books and nature books.

Basic humanities subjects: philosophy A, religion B, ethics C, logic D, aesthetics E, psychology F, language G, literature H, art I, politics J, economy K, military L, law M, education N, sports O, media P, information Q, management R, business S, history T, archaeology U, nationality V, life W, wealth X.

Natural basic disciplines: A astronomy, B geography, C mathematics, D physics, E chemistry, F biology, G machinery, H telecommunications, I water conservancy, J electric power, K textile, L food, M architecture, N mine, O metallurgy, P energy, Q transportation, R aerospace, S medicine, T engineering, U agriculture, V forestry, W aquaculture, X computer.

2. Books can be divided into writing, learning, teaching and helping according to their functional attributes.

3. According to the category of books, there are works (works, theoretical works and applied works), academics (comments, comments, argumentation, discussion, research, textual research and translation), teaching (school textbooks, social training textbooks, self-study textbooks, reference materials, handouts, learning materials, popular reading materials, experimental exercises, test questions and exercises, teaching syllabus) and help.

4. According to the international space of books, it is divided into domestic and foreign original books (non-disciplinary definition space).

Extended data:

Classification rule

1. There can only be one standard at each level between the concepts of genus and species.

4. The sum of the extensions of the children is equal to the extension of the parent, otherwise the division is incomplete or there are many children.

3. The divided concepts are incompatible, and the concepts of genus and species cannot be juxtaposed.

References:

Book Classification-Baidu Encyclopedia