What are the classifications of books? Urgent!

Bookstores are generally as follows:

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.

Libraries are generally as follows:

I Marxism-Leninism, Mao Zedong Thought and Deng Xiaoping Theory

Philosophy, religion

Introduction to social science

Politics, law

F economy

G. Culture, science, education and sports

H. Language and writing

I. Literature

J art

History, geography

Introduction to natural science