How many basic categories are there in China Library Classification?

China Library Classification is divided into 5 basic categories and 22 major categories.

The category names are as follows:

A. Marxism–Leninism, Mao Zedong Thought and Deng Xiaoping Theory

B. Philosophy, religion

C. overview of social sciences

D. Political, legal

E. Military affairs

F. Economy

G. Culture, science, education and sports

H. Language and writing

I. Literature

J. art

K. history, geography

Introduction to natural science

O. Mathematical science and chemistry

Page (abbreviation of page) astronomy, earth science

Q. Biological sciences

R. medicine and health

Southern agricultural science

T. industrial technology

Unit transportation

Verb (abbreviation for verb) aviation and aerospace

X. Environmental science, safety science

Z. comprehensive books

Library of Congress Classification

The Library of Congress Classification (LCC) is a comprehensive enumeration classification compiled by the Library of Congress under the auspices of its curator G.H. Putnam

1899, the earliest outline was drawn up with reference to the extended classification of C.A. Carter, and then compiled and published according to the major categories. 190 1 year published classification outline, 1902 published "Z Bibliography" volume, with the total length exceeding 1 10,000 pages.

The degree of subdivision of LC category depends on the quantity and content of books in the collection, and does not emphasize the rigor of the whole system. The category focuses on history, social science and literature.