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Library of Congress Subject Areas (7863)
- A General Works (54)
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    - AC1-195 Collections of Monographs, Essays, etc. (10)
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- B Philosophy. Psychology. Religion (45)
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  - BF Psychology (General) (32)
    - BF1-990 Psychology (4)
- C Auxiliary Sciences of History (1)
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- G Geography. Anthropology. Recreation (54)
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      - GA101-1776 Cartography (2)
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      - GE300-350 Environmental management (5)
  - GF Human ecology. Anthropogeography (General) (1)
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      - GF75 Human influences on the environment (1)
  - GN Anthropology (General) (2)
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      - GV1199-1570 Games and amusements (2)
- H Social Sciences (1780)
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      - HA29-32 Theory and method of social science statistics (2)
      - HA38-39 Registration of vital events. Vital records (1)
  - HB Economic theory. Demography (107)
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    - HB221-236 Price (1)
    - HB3711-3840 Business cycles. Economic fluctuations (1)
    - HB501 Capital. Capitalism (1)
    - HB522-715 Income. Factor shares (23)
      - HB615-715 Entrepreneurship. Risk and uncertainty. Property (20)
    - HB848-3697 Demography. Population. Vital events (1)
  - HC Economic History and Conditions (73)
    - HC79 Special Topics. Including air pollution, automation, consumer demand, famines, flow of funds, etc. (50)
  - HD Industries. Land use. Labor (637)
    - HD28-70 Management. Industrial Management (358)
      - HD30.23 Decision making (15)
      - HD38.5 Business logistics (5)
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      - HD53 Intellectual work. Intellectual capital (7)
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      - HD58.7-58.95 Organizational behavior, change and effectiveness. Corporate culture (16)
      - HD60-60.5 Social responsibility of business (6)
      - HD61 Risk in industry. Risk management (43)
      - HD62 Standardization. Simplification. Waste (4)
      - HD62.2-62.8 Management of special enterprises (1)
      - HD66-66.2 Work groups. Team work in industry. Quality circles (2)
      - HD69 Other Including business consultants, capacity, size of industries, etc. (4)
    - HD2321-4730.9 Industry (118)
      - HD2340.8-2346.5 Small and medium-sized businesses, artisans, handicrafts, trades (117)
    - HD2350.8-2356 Large industry. Factory system. Big business (27)
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      - HD2709-2930.7 Corporations. Including international business enterprises, diversification, industrial concentration, public utilities (25)
        HD2741 Holding companies. Corporate governance (19)
        HD2744 Corporations—Investor relations (2)
      - HD3611-4730.9 Industrial policy. The state and industrial organization (1)
    - HD4801-8943 Labor. Work. Working class (22)
      - HD4909-5100.9 Wages (2)
      - HD5481-5630.7 Industrial arbitration. Mediation and conciliation (2)
      - HD6050-6305 Classes of labor Including women, children, students, middle-aged and older persons, minorities (3)
      - HD6350-6940.7 Trade unions. Labor unions. Workers' associations (1)
      - HD6951-6957 Industrial sociology. Social conditions of labor (1)
      - HD7088-7252 Social insurance. Social security. Pension (2)
      - HD7255-7256 Vocational rehabilitation. Employment of people with disabilities (1)
      - HD7260-7780.8 Industrial hygiene. Industrial welfare (2)
      - HD8039 By industry or trade (1)
    - HD72-88 Economic growth, development, planning (9)
    - HD9000-9999 Special industries and trades (14)
  - HE Transportation and Communications (52)
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      - HE331-380 Traffic engineering. Roads and highways. Streets (2)
      - HE7601-8700.9 Telecommunication industry. Telegraph (1)
        HE8689-8700.95 Radio and television broadcasting (1)
  - HF Commerce (459)
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    - HF5001-6182 Business (394)
      - HF5381-5386 Vocational guidance. Career development (5)
      - HF5410-5417.5 Marketing. Distribution of products (198)
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      - HF5469.7-5481 Markets. Fairs (1)
      - HF5546-5548.6 Office management (62)
        HF5548.32-.34 Electronic commerce (15)
      - HF5548.7-5548.85 Industrial psychology (37)
      - HF5549-5549.5 Personnel management. Employment management (39)
      - HF5601-5689 Accounting. Bookkeeping (24)
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  - HG Finance (300)
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    - HG4001-4285 Finance management. Business finance. (22)
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    - HG4501-6051 Investment, capital formation, speculation (38)
      - HG4538 Foreign investments (4)
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  - HN Social history and conditions. Social problems. Social reform (4)
  - HQ The family. Marriage. Woman (7)
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      - HQ1060-1064 Aged. Gerontology (Social aspects). Retirement (2)
      - HQ793-799.2 Youth. Adolescents. Teenagers (2)
  - HT Communities. Classes. Races (2)
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  - HX Socialism. Communism. Anarchism (1)
  - H1-99 Social Sciences (General) (93)
  - HM Sociology (45)
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    - HM621-656 Culture (3)
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    - HM711-806 Groups and organizations (7)
  - HV Social pathology. Social and public welfare. Criminology (27)
    - HV5001-5720.5 Alcoholism. Intemperance. Temperance reform (1)
    - HV551.2-639 Emergency management (4)
    - HV5800-5840 Drug habits. Drug abuse (1)
    - HV6001-7220.5 Criminology (10)
      - HV6035-6197 Criminal anthropology Including criminal types, criminal psychology, prison psychology, causes of crime (8)
      - HV6251-6773.55 Crimes and offenses (2)
    - HV675-677 Accidents. Prevention of accidents (1)
    - HV697-4959 Protection, assistance and relief (2)
      - HV3176-3199 Special classes. By race or ethnic group (1)
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        HV1551-3024 People with disabilities Including blind, deaf, people with physical and mental disabilities (1)
    - HV7231-9960 Criminal justice administration (2)
      - HV7431 Prevention of crime, methods, etc. (1)
      - HV7551-8280.7 Police. Detectves. Constabulary (1)
- J Political Science (20)
  - JF Political institutions (General) (13)
    - JF20-2112 Political institutions and public administration (8)
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        JF225-619 Organs and functions of government (5)
        JF331-341 Parliamentary government (3)
        JF491-619 Legislation. Legislative process. Law-making (2)
  - JA1-92 Political science (General) (4)
    - JA71-80 Theory. Relations to other subjects (2)
  - JQ21-6651 Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.) (2)
  - JV1-9480 Colonies and colonization. Emigration and immigration. International migration (1)
- K Law (50)
  - K Law (General) (46)
    - K(175) Congresses (1)
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    - K115-130 The legal profession (1)
    - K201-487 Jurisprudence. Philosophy and theory of law (1)
    - K85-89 Legal research (1)
  - KZ Law of Nations (3)
  - KB1-4855 Religious law in general. Comparative religious law (1)
    - KB400-4855 Interdisciplinary discussion of subjects (1)
      - KB3098-3121.7 Medical legislation (1)
- L Education (672)
  - L Education (General) (102)
  - LB Theory and practice of education (557)
    - LB1501 Primary Education (2)
    - LB1603 Secondary Education. High schools (7)
    - LB2300 Higher Education (80)
    - LB2361 Curriculum (281)
    - LB1025-1050.75 Teaching (Principles and practice) (41)
      - LB1032 Group work in education (1)
    - LB1050.9-1091 Educational psychology (1)
    - LB1060 Learning (4)
    - LB2300-2430 Higher education (3)
  - LC Special aspects of education (16)
    - LC5201 Education extension. Adult education. Continuing education (4)
- M Music and Books on Music (1)
  - MT Musical instruction and study (1)
- N Fine Arts (92)
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- P Language and Literature (46)
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- Q Science (2208)
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    - Q300-390 Cybernetics (54)
  - QA Mathematics (1528)
    - QA1-43 General (16)
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    - QA71-90 Instruments and machines (1350)
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      - QA75.5-76.95 Electronic computers. Computer science (1337)
        QA76.75-76.765 Computer software (212)
    - QA801-939 Analytic mechanics (4)
  - QB Astronomy (2)
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      - QC310.15-319 Thermodynamics (1)
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      - QC501-(721) Electricity (13)
        QC676-678.6 Radio waves (Theory) (1)
        QC701-715.4 Electric discharge (1)
        QC717.6-718.8 Plasma physics. Ionized gases (3)
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- R Medicine (96)
  - R Medicine (General) (32)
    - R855-855.5 Medical technology (2)
    - R856-857 Biomedical engineering. Electronics. Instrumentation (3)
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  - RA Public aspects of medicine (24)
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- S Agriculture (8)
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- T Technology (3362)
  - T Technology (General) (1267)
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  - TA Engineering (General). Civil engineering (General) (881)
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  - TC Hydraulic engineering. Ocean engineering (5)
  - TD Environmental technology. Sanitary engineering (19)
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      - TD419-428 Water pollution (1)
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    - TD878-894 Special types of environment Including soil pollution, air pollution, noise pollution (3)
    - TD895-899 Industrial and factory sanitation (1)
  - TE Highway engineering. Roads and pavements (3)
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  - TH Building construction (6)
    - TH2025-3000 Details in building design and construction Including walls, roofs (1)
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    - TH845-895 Architectural engineering. Structural engineering of buildings (1)
  - TJ Mechanical Engineering and Machinery (106)
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    - TJ163.13-163.25 Power resources (2)
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    - TJ181-210 Mechanical movements (3)
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    - TJ212-225 Control engineering systems. Automatic machinery (General) (11)
    - TJ255-265 Heat engines (4)
    - TJ266-267.5 Turbines. Turbomachines (General) (1)
    - TJ807-830 Renewable energy sources (11)
    - TJ836-927 Hydraulic machinery (2)
  - TK Electrical engineering. Electronics Nuclear engineering (1025)
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    - TK3001-3521 Distribution or transmission of electric power (21)
    - TK301-399 Electric meters (1)
    - TK4125-4399 Electric lighting (2)
    - TK452-454.4 Electric apparatus and materials. Electric circuits. Electric networks (7)
    - TK4601-4661 Electric heating (1)
    - TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television (436)
    - TK7800-8360 Electronics (345)
      - TK7871 Electronics--Materials (69)
      - TK7885-7895 Computer engineering. Computer hardware (23)
        TK7895.M4 Memory systems (7)
      - TK8300-8360 Photoelectronic devices (General) (20)
    - TK9001-9401 Nuclear engineering. Atomic power (2)
    - TK9900-9971 Electricity for amateurs. Amateur constructors' manuals (1)
  - TL Motor vehicles. Aeronautics. Astronautics (23)
    - TL1-484 Motor vehicles. Cycles (12)
    - TL500-777 Aeronautics. Aeronautical engineering (5)
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  - TP Chemical technology (37)
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      - TP690-692.5 Petroleum refining. Petroleum products (1)
    - TP934-945 Paints, pigments, varnishes, etc. (1)
  - TR Photography (17)
    - TR250-265 Cameras (1)
    - TR624-835 Applied photography Including artistic, commercial, medical photography, photocopying processes (2)
    - TR845-899 Cinematography. Motion pictures (8)
  - TS Manufactures (42)
    - TS1300-1865 Textile industries (5)
    - TS155-194 Production management. Operations management (8)
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      - TS695 Chemical vapor deposition (1)
  - TT Handicrafts Arts and crafts (3)
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    - TT300-382.8 Painting. Wood finishing (1)
  - TX Home economics (22)
    - TX301-339 The house Including arrangement, care, servants (1)
    - TX341-641 Nutrition. Foods and food supply (1)
    - TX901-946.5 Hospitality industry. Hotels, clubs, restaurants, etc. Food service (1)
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- Z Bibliography. Library Science. Information Resources (28)
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      - ZA4050-4480 Electronic information resources (2)
      - ZA4450-4460 Databases (1)
      - ZA4550-4575 Motion pictures. Video recordings (3)