I Marxism-Leninism and Mao Zedong Thought

philosophy

Introduction to social science

Politics, law

E military

F economy

G. Culture, education, science and sports

H language, writing

I. Literature

J art

History, geography

Introduction to natural science

Mathematical science and chemistry

P astronomy, earth science

Q bioscience

R medicine and health

American agricultural science

technology

TD mining engineering

TE oil and gas industry

TF metallurgical industry

TG metallography, metal technology

Machinery and instrument industry

TJ weapon industry

TK power engineering

TL atomic energy technology

Radio electronics and electronic technology

TP automation technology and computing technology

TQ chemical industry

Light industry, handicraft industry

Slaughterhouse science

Television water conservancy project

U transportation

V. Aviation and aerospace

X. Environmental science

Z comprehensive publication

The Library Classification of China divides the knowledge content contained in documents into five basic categories and twenty categories, namely "books on Marxism-Leninism, Mao Zedong Thought, philosophy, social sciences, natural sciences and comprehensive disciplines". Each big category is represented by a capital letter, and each big category is divided into several subclasses.

At present, libraries in China are divided into five basic departments and twenty categories. This is the most basic concept and knowledge, and there is no breakthrough at present. There is an L level and an M level to increase the space.