At present, the classification of books in regular libraries basically follows the "Chinese Library Classification Law", with 22 major categories.
As follows:
A Marxism, Leninism, Mao Zedong Thought, Deng Xiaoping Theory
B Philosophy, Religion
C General Introduction to Social Sciences
D Politics, law
E Military
F Economy
G Culture, science, education, sports
H Language, writing< /p>
I Literature
J Art
K History, Geography
N General Introduction to Natural Sciences
O Mathematical Sciences and chemistry
PAstronomy, earth sciences
QBiological sciences
RMedicine, health
S Agricultural sciences
< p>T Industrial TechnologyU Transportation
V Aviation, Aerospace
X Environmental Science, Safety Science
Z Comprehensive Books