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What categories can books be divided into?

"Chinese Book Classification" is a classification compiled based on scientific classification and combined with the characteristics of books.

It divides subjects into five major categories and 22 categories. The basic sequence is:

Marxist-Leninist-Maoist thought, philosophy, social sciences, natural sciences, and comprehensive books,

Marxism, Leninism, Mao Zedong Thought

A Marxism, Leninism, Mao Zedong Thought

1 Works of Marx and Engels

11 Selections and anthologies

12 single-line works

121 The period of formation of Marxism (-1847)

122 The ups and downs of the revolutionary storm (1848-1863)

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123 The period of the First International and the Paris Commune (1864-1872)

124 The period of widespread spread of Marxism and the establishment of socialist parties in various countries (1873-June 1889)

125 The Second International Period (July 1889-1895)

13 Collection of letters, diaries, correspondence, conversations

14 Poetry

15 Handwriting

16 Thematic compilation

18 Quotations

2 Lenin's works

21 Selections and anthologies

22 Single lines Writings

23 Collection of letters, diaries, correspondence, conversations

25 Handwriting

26 Collection of special topics

28 Quotes

3 Stalin's writings

31 Anthologies, collections of essays

32 Single works

33 Collections of letters, diaries, correspondence, conversations

35 Handwriting

36 Thematic compilation

38 Quotations

4 Mao Zedong’s writings

41 Selections and anthologies

42 Single lines Books

421 Before the First Civil Revolutionary War (-1924)

422 During the First Civil Revolutionary War (1924-July 1927)

423 The First Civil Revolutionary War Period (August 1927-June 1937)

424 The Anti-Japanese War Period (July 1937-August 1945)

425 The period of the Third Civil Revolutionary War (September 1945-September 1949)

426 The period of socialist revolution and socialist construction

43 Collection of letters, diaries, correspondence, and conversations

44 Poetry

45 Handwriting

46 Thematic Collection

48 Quotations

5 Marx, Engels, Lenin, Collection of works by Stalin and Mao Zedong

56 Thematic collection

58 Quotations

7 The lives and biographies of Marx, Engels, Lenin, Stalin and Mao Zedong

71 Marx

72 Engels

73 Lenin

74 Stalin

75 Mao Zedong

8 Marxism , Leninism, and Mao Zedong Thought

81 Study and research of the works of Marx and Engels

82 Study and research of Lenin’s works

83 Stalin’s works The study and research of Mao Zedong's works

84 The study and research of Mao Zedong's works

85 The study and research of the compilation of works

Philosophy

B Philosophy

0 Philosophical Theory

0-0 Marxist Philosophy (General Introduction

)

1 Basic issues in philosophy

2 Dialectical materialism

21 Theory of materiality

22 Theory of consciousness

23 Epistemology, theory of reflection

24 Materialist dialectics

25 Categories of materialist dialectics

26 Thought methods and working methods

27 Dialectical materialism Application

3 Historical materialism (historical materialism)

8 Philosophical schools and their research

81 Idealism

82 Empirical Theory, Empirio-Criticism (Machism)

83 Voluntarism, Philosophy of Life

84 Neo-Kantian Attention, Neo-Hegelianism

85 New Reality Theory, logical positivism (neopositivism, logical empiricism)

86 Existentialism (survivalism)

87 Pragmatism

88 Neo-Thomism ( Neo-Scholasticism)

89 Other philosophical schools

1 World Philosophy 12 Ancient Philosophy 13 Medieval Philosophy 14 Modern Philosophy 15 Modern Philosophy

17 The spread of Marxist philosophy and development

2 Chinese Philosophy

20 Materialism and Idealism (General Introduction)

22 Pre-Qin Philosophy 221 Zhuzi 222 Confucianism 223 Taoism

224 Mohism 225 Famous Masters 226 Legalism 227 Yin Yang School 228 Strategist School

229 Miscellaneous School

232 Qin and Han Philosophy (General Introduction) (221 BC-220 AD) 233 Philosophy of the Qin Dynasty (221-207 BC)

234 Philosophy of the Han Dynasty (206 BC-220 AD) 235 Philosophy of the Three Kingdoms, Jin, and Southern and Northern Dynasties (220-589) 241 Philosophy of the Sui, Tang, and Five Dynasties (581-960)

244 Philosophy of the Song and Yuan Dynasties (960-1368) 248 Philosophy of the Ming Dynasty (1368-1644) 249 Philosophy of the Qing Dynasty (1644-1840)

25 Modern Philosophy (1840-1918) 26 Modern Philosophy (1919-)

27 The Spread and Development of Marxist Philosophy in China

3 Asian Philosophy

302 Ancient Philosophy (Asia) 303 Medieval Philosophy (Asia) 304 Modern Philosophy (Asia)

305 Modern Philosophy (Asia) 307 The Spread and Development of Marxist Philosophy in Asia

31 East Asian Philosophy 33 Southeast Asian Philosophy (1)

34 Southeast Asian Philosophy (2) 35 South Asian Philosophy

36 Central Asian Philosophy 37 West Asian Philosophy (1) 38 West Asian Philosophy (2)

4 African Philosophy

402 Ancient Philosophy (Africa) 403 Medieval Philosophy (Africa) 404 Modern Philosophy (Africa)

405 Modern Philosophy (Africa) 407 Marxist Philosophy in The Communication and Development of Africa

41 North African Philosophy 42 East African Philosophy 43 West African Philosophy (1) 44 West African Philosophy (2)

45 West African Philosophy (3) 46 Central African Philosophy 47 South African Philosophy (1) 48 South African Philosophy (2)

5 European Philosophy

502 Ancient Philosophy (Europe) 503 Medieval Philosophy (Europe) 504 Modern Philosophy (Europe)

505 Modern Philosophy (Europe) 507 The spread and development of Marxist philosophy in Europe

51 Eastern and Central European Philosophy (I) 52 Eastern and Central European Philosophy (II)

53 Nordic Philosophy 54 Southern European Philosophy (I) 55 Southern European Philosophy (II) 56 Western European Philosophy

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6 Oceanic Philosophy

7 American Philosophy

80 Science of Thinking (General Introduction)

81 Logic (Theoretical Theory)

0 General Introduction 811 Dialectical Logic 812 Formal Logic (Famous Science, Dialectics)

[813] Mathematical Logic (Symbolic Logic) (Suitable for O141) [814] Probabilistic Logic

815 Philosophical logic (non-classical logic) 819 Applied logic

82 Ethics (moral philosophy)

0 General 821 Outlook on life, philosophy of life 822 National morality 823 Family, Marriage Morality

824 Social Morality 825 Personal Cultivation

83 Aesthetics

0 General Introduction

832 Aesthetics and Social Production 832 Aesthetics and Reality Social Life[835] Art Aesthetics (Should Enter J01)

84 Psychology

0 General Introduction

841 Psychological Research Methods 842 Psychological Processes and Psychological Practices 843 Generative Psychology

844 Developmental Psychology (Human Psychology) 845 Physiological Psychology

846 Abnormal Psychology, Pathological Psychology, Superconscious Psychology 848 Personality Psychology, Personality Psychology

849 Applied Psychology

9 Atheism, Religion

91 Atheism 92 Religion 93 Mythology and Primitive Religion 94 Buddhism 95 Taoism

96 Islam (Islam) 97 Christianity 98 Other religions 99 Superstition

Social Sciences

C General Introduction to Social Sciences

0 Social Science Theory and Methodology

1 Current situation and overview of social sciences

2 Institutions, groups, conferences

3 Social science research methods

4 Social science education and General 5 Social science series, collections, serial publications

51 series (Huikeshu) 52 complete works, anthologies 53 collections, conference proceedings 54 yearbooks, annuals

55 serial publications, Journal

6 Social Science Reference Book

[7] "Social Science Literature Search Book (please check G257.33, Z88/89)"

8 Statistics

81 Statistical Methods

[82] Specialized Statistics (suitable for entry into related disciplines)

83 Statistical data from countries around the world

91 Society 92 Demography 93 Management

[94] Systems theory (systems, systems engineering) (please check N94)

96 Talent science

D Politics, Law

0 Political Theory

1/3 Communist Movement, Communist Party

1 International Communist Movement 2 Communist Party of China, Communist Youth League 3 Communist Parties of various countries

4 Workers, farmers, youth, women’s movements and organizations

5 World Politics

6 Chinese Politics

7 Politics of various countries

73 Asian Politics 74 African Politics 75 European Politics 76 Oceania Politics

77 Americas Politics

8 Diplomacy, International Relations

9 Law

E Military

0 Military Theory 1 World Military 2 Chinese Military

3/7 Military of various countries

3 Asian military 4 African military 5 European military 6 Oceanic military 7 American military

8 Strategy, tactics, battles

9 Military technology 99 Military topography , Military Geography

F Economics

0 Political Economics 1 Economic overview of various countries in the world, economic history, economic geography 2 Economic Planning and Management

3 Agricultural Economy 4 Industrial economy 5 Transportation economy 6 Somewhat economics

7 Trade economy 8 Finance, finance

G Culture, science, education, sports

0 Cultural theory

1 Overview of cultural undertakings in various countries around the world 11 World military 12 Chinese military 13 Asian military

14 African military 15 European military 16 Oceanic military 17 American military

2 Information and knowledge dissemination

3 Science, scientific research

4 Education

4 Education 5 Educational undertakings in various countries around the world 6 Education at all levels 7 Various types of education

8 Physical Education

H Language and Writing

0 Linguistics

1 Chinese

2 Chinese Minority Languages

3 Commonly used foreign languages ??31 English 32 French 33 German 34 Spanish 35 Russian

36 Japanese 37 Arabic

4/84 Languages ??of various language families

4 Sino-Tibetan language family 5 Altaic language family (Turkic-Mongol-Tungustic language family)

61 Austroasiatic language family 62 South Indian language family (Dravidian language family, Dravidian language family)

63 Austronesian language family (Malaya-Polynesian language family) 64 Northeast Asian language family

65 Ibero-Caucasian language family 66 Finno-Ugric language family 67 Semitic-Samine language family

7 Indo-European Languages ??81 African Languages ??83 American Languages ??84 Oceania Languages ??

9 International Auxiliary Languages ??

I Literature

0 Literary Theory

1 World Literature

2 Chinese Literature

3/7 Literature from various countries 3 Asian Literature 4 African Literature 5 European Literature

6 Ocean State Literature 7 American Literature

J Art

0 Art Theory

1 Overview of art in various countries in the world 2 Painting 29 Calligraphy, seal cutting

3 Sculpture 4 Photography Art 5 Arts and Crafts

[59] Architectural Art (please check TU-8)

6 Music 7 Dance 8 Theater Art

9 Film, Television Art

K History, Geography

0 Historical Theory

1 World History

2 Chinese History

3/7 History of various countries

3 Asian history 4 African history

5 European history 6 Oceania history 7 American history

81/83 Biography

81 Biographies of world figures and research and compilation of biographies 82 Biographies of Chinese figures

83 Biographies of figures from various countries

85/88 Cultural relics and archeology

85 Archeology 86 World cultural relics and archeology 87 Chinese cultural relics and archeology

88 Cultural relics and archeology of various countries

89 Customs and habits

9 Geography

Natural sciences

N General Introduction to Natural Sciences

0 Natural science theory and methodology 1 Current status and overview of natural science

2 Natural science institutions, groups, conferences 3 Natural science research methods

4 Natural science education and Popularization 5 Natural Science Series, Anthology, and Continuous Publications

6 Natural Science Reference Tool Book[7] "Natural Science Literature Retrieval Tool Book (Please check G257.36, Z88/89)"

8 Natural science surveys and inspections 91 Natural research, natural history

94 Systems theory (systematics, systems engineering) [99] Information science, information work (please check G35)

O Mathematical Science and Chemistry

1 Mathematics

11 Classical Mathematics 12 Elementary Mathematics

13 Advanced Mathematics 14 Mathematical Logic, Fundamentals of Mathematics 15 Algebra, Number theory, combinatorial theory

17 Mathematical analysis 18 Geometry, topology

19 Overall analysis, analysis on manifolds 21 Probability theory, mathematical statistics

22 Operations research 23 Cybernetics, information theory (mathematical theory)

24 Computational mathematics 29 Applied mathematics

3 Mechanics

31 Theoretical mechanics (general mechanics 32 Vibration theory

33 Continuum mechanics (deformable body mechanics) 34 Solid mechanics 35 Fluid mechanics

369 Physical mechanics 37 Rheology 38 Explosion mechanics 39 Applied mechanics

4 Physics

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41 Theoretical physics 42 Acoustics 43 Light 44 Electromagnetism, electrodynamics

45 Radio physics 46 Vacuum electronics (electron physics)

47 Semiconductor physics 48 Solid State Physics 51 Low Temperature Physics

52 High Pressure and High Temperature Physics 53 Plasma Physics 55 Heat and Material Molecular Kinetic Theory

56 Molecular Physics, High Energy Physics 59 Applied Physics Study

6 Chemistry

61 Inorganic Chemistry 62 Organic Chemistry 63 Polymer Chemistry (Polymer)

64 Physical Chemistry (Theoretical Chemistry), Chemical Physics 65 Analytical Chemistry 69 Applied Chemistry

7 Crystallography

P Astronomy, Earth Science

1 Astronomy 2 Surveying and Mapping 3 Geophysics 4 Meteorology 5 Geology

6 Geology (2) 7 Oceanography 9 Physical Geography

Q Biological Sciences

1 General Biology 2 Cytology 3 Genetics 4 Biology 5 Biochemistry

6 Biophysics 7 Molecular biology 81 Bioengineering [89] Environmental biology (please check X17)

91 Paleontology 93 Microbiology 94 Botany 95 Zoology 96 Entomology 8 Anthropology

R Medicine, Health

1 Preventive Medicine, Hygiene 2 Chinese Medicine 3 Basic Medicine 4 Clinical Medicine

5 Internal Medicine Study 6 Surgery 71 Obstetrics and Gynecology 72 Pediatrics

73 Oncology 74 Neurology and Psychiatry 75 Dermatology and Venereology 76 Otolaryngology 77 Ophthalmology

78 Oral Science

79 Foreign Ethnomedicine

8 Special Medicine

9 Pharmacy

S Agricultural Science

1 Basics of Agriculture Science 2 Agricultural Engineering 3 Agronomy (Agronomy) 4 Plant Protection

5 Crops 6 Horticulture 7 Forestry 8 Animal Husbandry, Veterinary Medicine, Hunting,

Silkworms, bees 9 Aquaculture, fishery

T Industrial science

TB General industrial technology

1 Basic engineering science

2 Engineering design and Surveying

3 Engineering Materials

[31] Metallic materials (please check TG4)

32 Non-metallic materials

33 Composite materials

35 Low-temperature resistant materials, high-temperature resistant materials

37 Corrosion-resistant materials

39 Other special performance materials

4 General industrial technology and Equipment

41 Blasting technology

42 Sealing technology

43 Film technology

44 Powder technology

48 Packaging Engineering

49 Factories, workshops

5 Acoustic engineering

6 Refrigeration engineering

7 Vacuum technology

8 Photography Technology

9 Metrology

TD Mining Engineering

1 Mine Geology and Surveying

2 Mine Design and Construction

3 Mine Pressure and Support

4 Mining Machinery

5 Mining Transportation and Equipment

6 Mining Electrician

7 Mining Safety and Labor Protection

8 Mining

9 Ore Processing

TE Petroleum and Natural Gas Industry

1 Petroleum and Natural Gas Geology and Exploration

2 Drilling Engineering

3 Oil and Gas Field Development and Exploitation

5 Offshore Oil and Gas Field Development and Exploitation

6 Petroleum and Natural Gas Processing Industry

8 Petroleum and natural gas storage and transportation

9 Petroleum machinery and equipment and automation

[99] Environmental protection and comprehensive utilization of petroleum and natural gas industry (should enter X74)

TF Metal Industry

0 General Questions

1 Metallurgical Technology

3 Metallurgical Machinery, Metallurgical Production Automation

4 Iron and steel smelting (ferrous metal smelting) (overview)

5 Iron smelting

6 Iron alloy smelting

7 Steel making

79 Other ferrous metal smelting

8 Non-ferrous metal smelting

TG Metallurgy, metal technology

1 Metallurgy, heat treatment

2 Casting

3 Metal pressure processing

4 Welding, metal cutting and bonding

5 Metal cutting and machine tools

7 Tools, abrasives, Grinding tools, fixtures, molds, hand tools

8 Tolerance and technical measurement and mechanical measuring instruments

9 Fitter technology, assembly technology

TH Mechanical and instrument technology

11 Mechanics (Basic Theory of Mechanical Design)

12 Mechanical Design, Calculation and Drawing

13 Mechanical Parts and Transmission Devices

14 Materials for machinery manufacturing

16 Machinery manufacturing process

17 Operation and maintenance

18 Machinery factory (workshop)

2 Lifting Transportation machinery

3 Pumps

4 Gas compression and transportation machinery

6 Special machinery

7 Instruments and meters

TJ Arms Industry

0 General Questions

2 Firearms

3 Artillery

4 Ammunition, fuses, pyrotechnics

5 Explosive equipment, pyrotechnics, and explosives

6 Underwater weapons

7 Rockets, missiles

8 Tanks, battleships, fighter planes, aerospace weapons

9 Nuclear weapons and other special weapons and protective equipment

TK Power Industry

0 General questions

1 Thermal engineering, heat engine

2 Steam power engineering

3 Thermal measurement and automatic thermal control

4 Internal combustion engine engineering

5 Special thermal energy and its utilization

6 Bioenergy and its utilization

7 Water energy, hydraulic machinery

8 Wind energy, wind machinery

91 Hydrogen energy and its utilization

TL Atomic energy technology

1 Basic theory

2 Nuclear fuel and its production

3 Nuclear reactor engineering

4 Various nuclear reactors and nuclear power plants

5 Accelerator

6 Controlled thermonuclear reaction (fusion reaction theory and experimental device)

7 Radiation protection

8 Particle detection technology, radiation detection technology and nuclear instruments Instruments

91 Nuclear explosion

92 Production and preparation of radioactive isotopes

929 Radiation sources

93 Packaging, transportation and Storage

94 Management and Comprehensive Utilization of Radioactive Waste

99 Application of Atomic Energy Technology

TM Electrical Technology

0 General Questions

1 Basic electrical theory

2 Electrical materials

3 Motor

4 Transformers, converters and reactors

5 Electrical appliances

6 Power generation and power plants

7 Power transmission and distribution projects, power grids and power systems

8 High voltage technology

91 Independent power supply technology (direct power generation)

92 Electrification, electric energy application

93 Electrical measurement technology and instruments

TN Radio electronics, telecommunications technology

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0 General questions

1 Vacuum electronic technology

2 Optoelectronic technology, laser technology

3 Semiconductor technology

4 Microelectronics, integrated circuits (IC)

6 Electronic components and assemblies

7 Basic electronic circuits

8 Radio and telecommunications equipment

91 Communications

92 Wireless Communications

93 Broadcasting

94 Television

95 Radar

96 Radio Navigation

97 Electronic countermeasures (interference and anti-interference)

[98] Radio and telecommunications measurement technology and instruments (please check TM93)

99 Radio electronics Application

TP Automation technology, computing technology

1 Basic theory of automation

11 Automation system theory

13 Automation control theory

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14 Automatic information theory

15 Automatic simulation theory (automatic simulation theory)

17 Switch circuit theory

18 Artificial intelligence theory

2 Automation technology

and equipment

20 General issues

21 Automation components and parts

23 Automation devices and equipment

24 Robotics

27 Automation system theory

29 Application of automation technology in various aspects

3 Computing technology, computers

30 General issues

31 Computer software

32 General calculators and computers

33 Electronic digital computers (discontinuous action electronic computers)

34 Electronic analog computers (continuous action computers) Functional computer)

35 Hybrid computer

36 Microcomputer

38 Other computers

39 Computer applications

6 Fluid technology (fluid control technology)

60 General issues

61 Fluid components

62 Fluid accessories

63 Detection and signaling device

64 Actuator

65 Power source

66 Jet control circuit

67 Jet automatic control system

69 Application of jet technology

7 Remote sensing technology

70 General issues

72 Remote sensing methods

73 Detection instruments and systems

75 Interpretation, recognition and processing of remote sensing images

79 Application of remote sensing technology

8 Telecontrol technology

80 General questions

[81] Components and components (should be included in TP21)

83 Telecontrol devices

84 Channels

87 Telecontrol system

89 Application of telecontrol technology in various aspects

TQ Chemical Industry

0 General questions

1 Basic theory

2 Chemical process (physical process and physical and chemical process)

3 Chemical reaction process

4 Chemical raw materials and auxiliary materials

5 Chemical machinery and equipment

6 Chemical production process, final processing and packaging

7 Chemical products and by-products

8 Chemical factory

[09] Treatment and Comprehensive Utilization of Chemical Industry Wastes (Should be included in X78)

11 Basic Inorganic Chemical Industry

110 General Issues

111 Inorganic Acid production

113 Ammonia and ammonium salt industry

114 Chlor-alkali industry

115 Inorganic salt industry

116 Industrial gases

117 Special gases

118 Inorganic peracid and persalt

12 Chemical industry of non-metallic elements and their inorganic compounds 13 Chemical industry of inorganic compounds of metallic elements

15 Electrochemical industry 16 Electric heating industry, high temperature products industry

17 Silicate industry 2 Basic organic chemical industry

31 Polymer compound industry (polymer industry)

32 Synthetic resin and plastic industry 33 Rubber industry

34 Chemical fiber industry

35 Cellulose chemical processing industry 41 Production of solvents and plasticizers

> 42 Production of reagents and pure chemicals 43 Adhesive industry

44 Chemical fertilizer industry

45 Pesticide industry 46 Pharmaceutical chemical industry 51 Fuel chemical industry

52 Coking Chemical industry

53 Coal chemistry and coal processing and utilization

54 Coal gasification industry

55 Fuel lighting industry

56 Explosives industry , Match Industry

57 Photosensitive Material Industry

58 Magnetic Recording Material Industry

61 Dyestuff and Intermediate Industry

62 Pigment Industry

63 Paint industry

64 Chemical processing industry of oils and waxes, soap industry

65 Perfume and cosmetics industry

9 Other chemical industries

TS Light industry, handicraft industry

0 General questions

1 Textile industry, dyeing and finishing industry

2 Food industry

3 Salt industry

4 Tobacco industry

5 Leather industry

6 Wood processing industry, furniture manufacturing industry

7 Paper industry

8 Printing industry

91 Hardware industry

93 Arts and crafts manufacturing industry

94 Clothing industry, shoe industry

95 Other light industries and handicrafts

97 Living supply technology

TU Architectural science

1 Basic science of architecture

19 Architectural survey

2 Architectural design

3 Building structure

4 Soil mechanics, foundation engineering

5 Building materials

6 Building construction machinery and equipment

7 Building construction

8 House construction equipment

9 Underground construction

7 High-rise Architecture

98 Regional Planning, Town Planning

99 Municipal Engineering

TV Water Conservancy Engineering

1 Basic Courses in Water Conservancy Engineering

21 Water data survey and water conservancy planning

22 Hydraulic survey and design

3 Hydraulic structure

4 Hydraulic materials

5 Water conservancy project construction

6 Water conservancy hubs and hydraulic structures

7 Water capacity utilization, hydropower station projects

8 River control projects and flood control projects

[91] Canal (canal, channel) project (suitable for U61)

[02] Harbor project (suitable for U65)

[93] Farmland Water conservancy project (should enter S27)

U Transportation

1 Comprehensive transportation

2 Railway transportation

4 Road transportation

41 Road Engineering

44 Bridge and Culvert Engineering

45 Tunnel Engineering

46 Automobile Engineering

461 Automobile Theory

462 Vehicle design and calculation

463 Automobile structural components

464 Automobile engine

465 Automotive materials

466 Automobile Manufacturing process

467 Automobile experiment

468 Automobile factory

469 Various purpose automobiles

47

1 Driving and using cars

472 Car maintenance and repair

473 Fuel and lubricants for cars

48 Other road transportation tools

49 Traffic Engineering and Road Transport Technology Management

6 Water Transport

[8] Air Transport

V Aviation, Aerospace

1 Aviation , Research and exploration of aerospace technology

11 Development of aviation and aerospace and space exploration

19 Application of aviation and aerospace

2 Aviation

21 Basic theory and experiment

22 Aircraft structure and design

23 Aviation engine (propulsion system)

24 Aviation instruments, equipment, control and navigation

25 Aviation materials

26 Aviation manufacturing process

27 Various types of spacecraft

31 Aviation fuels and lubricants

32 Aviation flight technology

35 Airport (station), airport and technical management

37 Aviation system engineering

4 Aerospace (space navigation)

41 Basic theory and experiment

42 Rocket and spacecraft structure (overall)

43 Propulsion system (engine, thruster)

44 Instruments, equipment, guidance and control

[45] Aerospace materials (please check V25)

46 Manufacturing process

47 Spacecraft and its carriers

51 Aerospace fuels (propellants) and lubricants

52 Aerospace technology

55 Ground equipment, test sites, launch sites, aerospace bases

57 Aerospace Systems Engineering

[7] Aviation and Aerospace Medicine (suitable for R85)

X Environmental Science

1 Basic Theory of Environmental Science

2 Comprehensive environmental research

3 Environmental protection management

4 Disasters and their prevention and control

5 Environmental pollution and their prevention and control

7 Waste treatment and comprehensive utilization

8 Environmental quality assessment and environmental monitoring

9 Labor protection science (safety science)

Comprehensive books

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Z comprehensive books

1 series of books

2 encyclopedias, general books

3 dictionaries

4 collections of essays, Complete works, anthologies, and miscellaneous works

5 Yearbooks, annuals

6 Periodicals, serial publications

8 Book catalogs, abstracts, indexes