1 Chinese

2 China minority languages

Three commonly used foreign languages

4 Sino-Tibetan language family

5 Altaic language family

6 1/67 Other small languages

7 Indo-European language family

8 1 African Language 83 American Language 84 Oceania Language

9 International Auxiliary Language 0 Art Theory

1 overview of world art

2 painting 29 calligraphy and seal cutting

3 sculpture

4 photography art

5 Arts and Crafts

6 music

7 dance

8 drama art

9 film and television art 0 historical theory

1 world history

2 History of China

3 Asian history

4 African history

5 European history

6 History of Oceania

7 American history

8 1 Biography 85 Cultural Relics and Archaeology 89 Customs and Habits

9 Geography 0 Theory and Methodology of Natural Science

1 Present situation and development of natural science

2. Natural science organs, organizations and conferences

3 natural science research methods

4. Natural science education and popularization

5 natural science series, anthologies and serial publications.

6 natural science reference books

8. Natural science investigation and investigation

9 1 Natural Studies, Natural History 93 Nonlinear Science 94 System Science 1 Mathematics

3 mechanics

4 physics

6 chemistry

7 crystallography 1 astronomy

2 Surveying and mapping

3 Geophysics

4 Atmospheric Science (Meteorology)

5 Geology

7 oceanography

9 physical geography 1 general biology

2 cytology

3 genetics

4 physiology

5 biochemistry

biophysics

7 Molecular Biology 8 1 Biotechnology (Biotechnology)

9 1 Paleontology 93 Microbiology 94 Botany 95 Zoology 96 Entomology 98 Anthropology 1 Preventive Medicine and Hygiene

2 China Medicine

3 basic medicine

4 clinical medicine

5 internal medicine

6 surgical operation

7 1 Obstetrics and Gynecology 72 Pediatrics 73 Oncology 74 Neurology and Psychiatry 75 Dermatology 76 Otolaryngology 77 Ophthalmology 78 Stomatology 79 Foreign Ethnic Medicine

Special medicine

9 Pharmacy 1 Basic Agricultural Science

2 Agricultural engineering

3 Agronomy (Agronomy)

4 Plant protection

Five crops

6 gardening

7 forestry

Animal husbandry, veterinary medicine, hunting, silkworms and bees

9 TB aquatic products and fishery general industrial technology

TD mining engineering

Oil and gas engineering

TF metallurgical industry

Metallurgy and metal technology

Machinery and instrument industry

TJ weapon industry

TK energy and power engineering

TL atomic energy technology

TM electrical technology

TN electronic technology and communication technology

TP automation technology and computing technology

TQ chemical industry

Light industry and handicraft industry

Slaughterhouse science

Television Water Conservancy Project 1 Comprehensive Transportation

2 Railway transportation

3 Road transportation

Research and Exploration of Waterway Transportation 1 Aerospace Technology

2 aviation

3 Aerospace (Cosmos) 1 Basic Theory of Environmental Science

2 Society and environment

3 environmental protection management

4 disasters and their prevention and control

5 Environmental pollution and its prevention and control

7 Waste treatment and comprehensive utilization

8 environmental quality assessment and environmental monitoring

9 safety science series Z 1 series Z 12 China series Z 126 old classics series Z 13 Asia series Z 14 Africa series Z 15 Europe series Z 16 Oceania series z/kloc-0. Book Z227 Modern Z228 Comprehensive popularization reading Z228. 1 Children reading Z228.2 teenagers reading Z228.3 middle-aged and elderly reading Z228.4 women reading Z228.5 men reading Z23 Asian encyclopedia Z24 African encyclopedia Z25 European encyclopedia Z26 Oceania Chinese encyclopedia Z27 American encyclopedia Z32 China dictionary Z33 Asian dictionary Z34 African dictionary Z35 European dictionary Z36 Oceania dictionary Z36 Europe, Oceania, America, China, Z52, Annual Z53 Yearbook for Asian countries, annual Z54 Yearbook for African countries, annual Z55 Yearbook for European countries, annual Z56 Yearbook for Oceania countries, annual Z57 Yearbook for American countries, annual Z6 periodical, continuous publication of Z62 China periodical, continuous publication of Z63 Asian national periodical, continuous publication of Z64 African periodical, continuous publication of Z65 European periodical, continuous publication of Z66 Oceania periodical, continuous publication of Z67 American periodical, Continuously publish Z68 professional journals, Z8 book catalogue, abstract index Z8 1 national catalogue Z8 12 China catalogue Z8 13 Asia catalogue Z8 14 Africa catalogue Z8 15 Europe catalogue Z8 16 Oceania catalogue Z8/6. Z83 All kinds of catalogues Z84 Private book catalogue Z85 Publishing catalogue Z86 Personal works catalogue Z87 Periodical catalogue newspaper catalogue Z88 Special subject catalogue Z89 Abstract and index