Introduction to natural science; Mathematical science and chemistry; P astronomy, earth science; Biological sciences; R. medicine and health; Agricultural science; T industrial technology; U transportation; V aviation and aerospace; X environmental science and labor protection science (safety science); Z comprehensive books.
Extended data:
The source of library book classification:
China Library Classification is a representative large-scale comprehensive classification compiled and published after the founding of the People's Republic of China, and it is the most widely used classification system in domestic libraries today. The compilation of China Library Classification began at 197 1 and has been published in five editions. Compared with other classifications in China, China Library Classification came into being late, but it developed rapidly.
It not only systematically summarizes the compilation experience of China classification, but also absorbs the compilation theory and technology of foreign classification.
According to a certain ideological point of view, based on subject classification, combined with the contents and characteristics of books and materials, a classification table is formed according to categories. At present, China Library Classification has been widely used in all kinds of libraries in China.
Baidu Encyclopedia-China Library Book Classification