What are the categories of books?

You can refer to the Chinese Book Classification to classify books

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

It divides subjects into five major categories and 22 major categories. The basic sequence is: Marxism-Leninism-Maoism thought, philosophy, social sciences, natural sciences, comprehensive books,

A Marxism, Leninism, Mao Zedong Thought

A Marxism, Leninism, Mao Zedong Thought

1 Works of Marx and Engels

11 Selections and Collected Works

12 Single line works

121 The period of formation of Marxism (-1847)

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

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 Second International Period (July 1889-1895)

13 Collection of letters, diaries, correspondence, conversations

14 Poetry

15 Handwriting

16 Collection of special topics

18 Quotations

2 Lenin's works

21 Selections and collections

22 Single works

23 Collection of letters, diaries, correspondence, conversations

25 Handwriting

26 Collection of special topics

28 Quotations

3 Stalin’s writings

31 Anthologies, anthologies

32 Single works

33 Collections of letters, diaries, correspondence, conversations

35 Handwriting

36 Special topics collection

38 Quotes

4 Mao Zedong's writings

41 Selections and anthologies

42 Single works

421 Before the First Civil Revolutionary War (-1924)

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

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

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

425 The Third Civil Revolutionary War Period (September 1945-September 1949)

426 Period of Socialist Revolution and Socialist Construction

43 Collection of letters, diaries, correspondence, and conversations

44 Poetry

45 Handwriting

46 Collection of special topics

48 Quotations

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

56 Thematic Collection

58 Quotations

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

71 Marx

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72 Engels

73 Lenin

74 Stalin

75 Mao Zedong

8 Marxism, Leninism, Mao Zedong Thought Study and research on the works of Marx and Engels

81 Study and research on the works of Marx and Engels

82 Study and research on the works of Lenin

83 Study and research on the works of Stalin

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84 Study and Research on Mao Zedong’s Works

85 Study and Research on Collection of Works

B Philosophy

B Philosophy

0 Philosophical Theory

0-0 Marxist Philosophy (General Introduction)

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1 Basic issues in philosophy

2 Dialectical materialism

21 Theory of materiality

22 Theory of consciousness

23 Theory of epistemology and reflection theory

24 Materialist Dialectics

25 Categories of Materialist Dialectics

26 Thinking Methods and Working Methods

27 Application of Dialectical Materialism

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3 Historical materialism (historical materialism)

8 Philosophical schools and their research

81 Idealism

82 Positivism, empirical criticism ism (Machism)

83 Voluntarism, philosophy of life

84 Neo-Kantian attention, neo-Hegelianism

85 New realism, logical positivism On (New Positivism, Logical Empiricism)

86 Existentialism (Survivalism)

87 Pragmatism

88 Neo-Thomism (New Scholasticism)

89 Other philosophical schools

1 World philosophy

12 Ancient philosophy

13 Medieval philosophy

14 Modern times Philosophy

15 Modern Philosophy

17 The Spread and Development of Marxist Philosophy

2 Chinese Philosophy

20 Materialism and Idealism ( General)

22 Pre-Qin Philosophy

221 Pre-Confucian Philosophy

222 Confucianism

223 Taoism

224 Mohist

225 Famous

226 Legalist

227 Yin-Yang

228 Political strategist

229 Miscellaneous

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) Years)

25 Modern Philosophy (1840-1918)

26 Modern Philosophy (1919- Years)

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)

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404 Modern Philosophy (Africa)

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p> 405 Modern Philosophy (Africa)

407 The Spread and Development of Marxist Philosophy in Africa

41 North African Philosophy

42 East African Philosophy

43 West African Philosophy (I)

44 West African Philosophy (II)

45 West African Philosophy (III)

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 (1)

55 Southern European Philosophy (2)

56 Western European Philosophy

6 Oceanic Philosophy

7 American Philosophy

80 Science of Thinking (General Introduction)

81 Logic (Confucianism)

0 General Introduction

811 Dialectical Logic

812 Formal logic (fame, dialectics)

[813] Mathematical logic (symbolic logic) (appropriate to O141)

[814] Probabilistic logic

815 Philosophical Logic (Non-Classical Logic)

819 Applied Logic

82 Ethics (Moral Philosophy)

0 General Introduction

821 Outlook on life, philosophy of life

822 National ethics

823 Family and marriage ethics

824 Social ethics

825 Personal cultivation

83 Aesthetics

0 General Introduction

832 Aesthetics and Social Production

832 Aesthetics and Real 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 Myth and primitive religion

94 Buddhism

95 Taoism

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96 Islam (Islam)

97 Christianity

98 Other religions

99 Superstition

C Society Science

C General Introduction to Social Sciences

0 Social Science Theory and Methodology

1 Current Situation and Overview of Social Sciences

2 Institutions and Groups , conference

3 Social science research methods

4 Social science education and popularization

5 Social science series, collections, and continuous publications

51 Series (Hui Keshu)

52 Complete works and anthologies

53 Collected works and conference proceedings

54 Yearbooks and annuals

55 Serials and journals

6 Social sciences Reference books

[7] "Social science literature search book (please check G257.33, Z88/89)"

8 Statistics

81 Statistics Methods

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

83 Statistical data from countries around the world

91 Sociology

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* The Communist Movement

2 The Communist Party of China and the Communist Youth League

3 The 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 American 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 Oceania Military

7 American Military

8 Strategy, Tactics, and Battles

9 Military Technology

99 Military Topography, Military Geography Study

F Economics

0 Political Economics

1 Economic overview, economic history, economic geography of various countries in the world

2 Economic planning and Management

3 Agricultural Economy

4 Industrial Economy

5 Transportation Economy

6 Somewhat Economic

7 Trade Economics

8 Finance, Finance

G Culture, Science, Education, Sports

0 Cultural Theory

1 Cultural undertakings in various countries around the world Overview

11 World Military

12 Chinese Military

13 Asian Military

14 African Military

15 Europe Military

16 Oceania Military

17 American Military

2 Information and Knowledge Dissemination

3 Science, Scientific Research

4 Education

4 Education

5 Education in various countries in the world

6 Education at all levels

7 Various types of education

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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

62 South Indian (Dravidian, Dravida)

63 Austronesian (Malayan-Polynesian) )

64 Northeast Asian Languages

65 Ibero-Caucasian Languages

66 Finno-Ugric Languages

67 Semitic -Inclusive language family

7 Indo-European language family

81 African language family

83 American language family

84 Oceania language family

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9 International Auxiliary Language

I Literature

0 Literary Theory

1 World Literature

2 Chinese Literature

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3/7 Literature from various countries

3 Asian literature

4 African literature

5 European literature

6 Oceania Literature

7 American Literature

J Art

0 Art Theory

1 Overview of Art in Countries in the World

2 Painting

29 Calligraphy, seal cutting

3 Sculpture

4 Photography art

5 Arts and crafts

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

6 Music

7 Dance

8 Theater Arts

9 Film and Television Arts

K History, Geography

0 Historical Theory

1 World History

2 Chinese History

3/ 7 History of various countries

3 History of Asia

4 History of Africa

5 History of Europe

6 History of Oceania

7 History of the Americas

81/83 Biography

81 Research and preparation of biographies and biographies of world figures

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

N 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, collections, and serial publications

6 Natural science reference books

[7] "Natural science literature search tool (please check G257.36, Z88/89)"

8 Natural science investigation and inspection

91 Natural research, nature History

94 Systems theory (systems, 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, Basic Mathematics

15 Algebra, number theory, combinatorial theory

17 Mathematical analysis

18 Geometry, topology

19 Overall analysis, analysis on manifold

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

41 Theoretical Physics

42 Acoustics

43 Optics

44 Electromagnetics, electrodynamics

45 Radio physics

46 Vacuum electronics (electron physics)

47 Semiconductors Physics

48 Solid State Physics

51 Low Temperature Physics

52 High Pressure and High Temperature Physics

53 Plasma Physics

55 Thermal and kinetic theory of material molecules

56 Molecular physics, high energy physics

59 Applied physics

6 Chemistry

61 Inorganic Chemistry

62 Organic Chemistry

63 Polymer Chemistry (Polymer)

64 Physical Chemistry (Theoretical Chemistry), Chemistry Physics

65 Analytical Chemistry

69 Applied Chemistry

7 Crystallography

P Astronomy, Earth Science

1 Astronomy

2 Surveying

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 and Health

1 Preventive Medicine and Hygiene

2 Chinese Medicine

3 Basic Medicine

4 Clinical Medicine

5 Internal Medicine

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 Ethnic Medicine

8 Special Medicine

9 Pharmacy

S Agricultural Science

1 Basic Agricultural Science

2 Agricultural Engineering

3 Agricultural Science (Agronomy)

4 Plant protection

5 Crops

6 Horticulture

7 Forestry

8 Animal husbandry, veterinary medicine, hunting, silkworms, Bee

9 Aquaculture, Fisheries

T Industrial Science

TB General Industrial Technology

1 Basic Engineering Science

2 Engineering design and surveying

3 Engineering materials science

[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 Explosive technology

42 Sealing technology

43 Thin film technology

44 Powder technology

48 Packaging Engineering

49 Factory, Workshop

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 Mine safety and labor protection

8 Mine mining

9 Ore dressing

TE Petroleum and natural gas industry

1 Petroleum, 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 automation

[99] Environmental protection and comprehensive utilization of petroleum and natural gas industry (appropriate Enter p>

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 Tolerances and technical measurements and mechanical measuring instruments

9 Fitter technology and 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 Mechanical manufacturing materials

16 Mechanical manufacturing process

17 Operation and maintenance

18 Machinery factory (workshop)

2 Lifting and transportation machinery

3 Pumps

4 Gas compression and conveying machinery

6 Special Machinery

7 Instruments and Instruments

TJ Weapons Industry

0 General Questions

2 Firearms

3 Artillery

4 Ammunition, fuses, pyrotechnics

5 Explosive equipment, pyrotechnics, explosives

6 Water 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, Thermal Engine

2 Steam Power Engineering

3 Thermal Engineering Measurement and thermal automatic 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 instrumentation

91 Nuclear explosion

92 Production and preparation of radioactive isotopes

929 Radiation source

93 Packaging, transportation and storage of radioactive materials

94 Management and Comprehensive Utilization of Radioactive Waste

99 Application of Atomic Energy Technology

TM Electrical Technology

0 General Questions

1 Electrician Basic Theory

2 Electrical Materials

3 Electric Machines

4 Transformers, Converters and Reactors

5 Electrical Appliances

6 Power generation, 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

0 General Questions

1 Vacuum electronic technology

2 Optoelectronics 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 (jamming and anti-jamming)

[98] Radio,

Telecommunications measurement technology and instruments (please check TM93)

99 Application of radio electronics

TP Automation technology, computing technology

1 Basic theory of automation

11 Automation system theory

13 Automation control theory

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 Automation technology in various aspects Application

3 Computing technology, computers

30 General questions

31 Computer software

32 General calculators and computers

33 Electronic digital computer (discontinuous action electronic computer)

34 Electronic analog computer (continuous action electronic computer)

35 Hybrid electronic computer

36 Microcomputer

38 Other computers

39 Computer applications

6 Fluid technology (fluid control technology)

60 General issues

61 Jet components

62 Jet 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

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79 Application of remote sensing technology

8 Telecontrol technology

80 General issues

[81] Components and components (should be entered into TP21)

83 Telecontrol device

84 Channel

87 Telecontrol system

89 Application of telecontrol technology in various aspects

TQ Chemical Industry

0 General Questions

1 Basic Theory

2 Chemical Processes (Physical Processes and Physical and Chemical Processes)

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 Plant

[09] Treatment and Comprehensive Utilization of Chemical Industry Wastes (Should Enter X78)

11 Basic inorganic chemical industry

110 General issues

111 Production of inorganic acids

113 Ammonia and ammonium salt industry

114 Chlor-alkali industry

115 Inorganic salt industry

116 Industrial gases

117 Special gases

118 Inorganic peracid and peracid

Salt

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

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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 materials industry

58 Magnetic recording materials industry

61 Dyes and intermediates industry

62 Pigments 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, shoemaking industry

95 Other light industries, Handicrafts

97 Living Supply Technology

TU Building Science

1 Basic Building Science

19 Building 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 Buildings

98 Areas 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 Hydraulic engineering construction

6 Water conservancy projects and hydraulic structures

7 Water capacity utilization and hydropower station projects

8 River control projects and flood control projects

[91] Transportation Canals (canals, channels) projects (should be entered into U61)

[02] Harbor projects (should be entered into U65)

[93] Farmland water conservancy projects (should be entered into S27)

U Transportation<

/p>

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 Automobile materials

466 Automobile manufacturing process

467 Automobile experiment

468 Automobile factory

469 Automobiles for various purposes

471 Automobile driving and use

472 Automobile maintenance and repair

473 Automobiles Using fuel and lubricants

48 Other road transportation tools

49 Traffic engineering and road transportation technical management

6 Water transportation

[ 8] Air transportation

V Aviation and aerospace

1 Research and exploration of aviation and aerospace technology

11 Development of aviation and aerospace and space exploration

19 Aviation and aerospace applications

2 Aviation

21 Basic theory and experiment

22 Aircraft structure and design

23 Aviation engines (propulsion systems)

24 Aviation instruments, equipment, control and navigation

25 Aviation materials

26 Aviation manufacturing processes

27 Various types of spacecraft

31 Aviation fuel and lubricants

32 Aviation flight technology

35 Airport (station), airport and technical management

37 Aerospace Systems 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

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

57 Aerospace system engineering

[7] Aviation and aerospace medicine (should be included in 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)

Z Comprehensive Books

Z Comprehensive Books

1 Series

2 Encyclopedias and general books

3 Dictionaries

4 Collections of essays, complete works, anthologies, and miscellaneous works

5 Yearbooks and annuals

6 Periodicals, serial publications

8 Book catalogue, abstracts, indexes