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Library of Congress Subject Areas (9100)
- A General Works (54)
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- B Philosophy. Psychology. Religion (60)
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- C Auxiliary Sciences of History (1)
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- G Geography. Anthropology. Recreation (67)
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- H Social Sciences (2141)
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    - HD2321-4730.9 Industry (126)
      - HD2340.8-2346.5 Small and medium-sized businesses, artisans, handicrafts, trades (122)
    - HD2350.8-2356 Large industry. Factory system. Big business (35)
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        HD2741 Holding companies. Corporate governance (22)
        HD2744 Corporations—Investor relations (3)
      - HD3611-4730.9 Industrial policy. The state and industrial organization (2)
    - HD4801-8943 Labor. Work. Working class (38)
      - HD4909-5100.9 Wages (6)
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      - HD6050-6305 Classes of labor Including women, children, students, middle-aged and older persons, minorities (6)
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      - HD7260-7780.8 Industrial hygiene. Industrial welfare (3)
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    - HD72-88 Economic growth, development, planning (18)
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  - HE Transportation and Communications (58)
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      - HE1001-5600 Railroads. Rapid transit systems (1)
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      - HE5601-5725 Automotive transportation Including trucking, bus lines, and taxicab service (1)
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  - HF Commerce (577)
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    - HF5001-6182 Business (507)
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      - HF5410-5417.5 Marketing. Distribution of products (243)
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      - HF5460-5469.5 Department stores. Mail order business. Supermarkets. Convenience stores (2)
      - HF5469.7-5481 Markets. Fairs (2)
      - HF5546-5548.6 Office management (76)
        HF5548.32-.34 Electronic commerce (26)
      - HF5548.7-5548.85 Industrial psychology (37)
      - HF5549-5549.5 Personnel management. Employment management (58)
      - HF5601-5689 Accounting. Bookkeeping (30)
      - HF5717-5734.7 Business communication Including business report writing, business correspondence (1)
      - HF5735-5746 Business records management (1)
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  - HG Finance (348)
    - HG1710 Electronic Funds Transfers (83)
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      - HG2397-3550 By region or country (1)
    - HG178 Liquidity (7)
    - HG179 Personal finance (6)
    - HG201-1496 Money (4)
    - HG3691-3769 Credit. Debt. Loans. Including credit institutions, credit instruments, consumer credit, bankruptcy (12)
    - HG3810-4000 Foreign exchange. International finance. International monetary system (8)
    - HG4001-4285 Finance management. Business finance. (24)
    - HG4301-4480.9 Trust services. Trust companies (2)
    - HG4501-6051 Investment, capital formation, speculation (49)
      - HG4530 Investment companies. Investment trusts. Mutual funds (2)
      - HG4538 Foreign investments (4)
      - HG4551-4598 Stock exchanges (20)
      - HG4621 Stockbrokers. Security dealers. Investment advisers (1)
      - HG6001-6051 Speculation (2)
    - HG8011-9999 Insurance (5)
      - HG8751-9295 Life insurance (2)
      - HG9371-9399 Health insurance (1)
      - HG9969.5-9999 Other insurance Including automobile, burglary, credit, disaster, title insurance (1)
  - HJ Public Finance (7)
    - HJ2240-5908 Revenue. Taxation. Internal revenue (1)
    - HJ9701-9940 Public accounting. Auditing (1)
  - HN Social history and conditions. Social problems. Social reform (5)
  - HQ The family. Marriage. Woman (10)
    - HQ1101-2030.7 Women. Feminism (1)
    - HQ503-1064 The family. Marriage. Home (7)
      - HQ1060-1064 Aged. Gerontology (Social aspects). Retirement (4)
      - HQ767.8-792.2 Children. Child development Including child rearing, child life, play, socialization, children's rights (1)
      - HQ793-799.2 Youth. Adolescents. Teenagers (2)
  - HT Communities. Classes. Races (2)
    - HT1501-1595 Races Including race as a social group and race relations in general (1)
  - HX Socialism. Communism. Anarchism (1)
  - H1-99 Social Sciences (General) (102)
  - HM Sociology (66)
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    - HM621-656 Culture (3)
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    - HM701 Social systems (2)
    - HM711-806 Groups and organizations (17)
  - HV Social pathology. Social and public welfare. Criminology (38)
    - HV5001-5720.5 Alcoholism. Intemperance. Temperance reform (1)
    - HV551.2-639 Emergency management (5)
      - HV599-639 Special types of disasters (1)
    - HV5725-5770 Tobacco habit (1)
    - HV5800-5840 Drug habits. Drug abuse (1)
    - HV6001-7220.5 Criminology (13)
      - HV6035-6197 Criminal anthropology Including criminal types, criminal psychology, prison psychology, causes of crime (8)
      - HV6251-6773.55 Crimes and offenses (5)
    - HV675-677 Accidents. Prevention of accidents (1)
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      - HV4480-4630 Mendicancy. Vagabondism. Tramps. Homelessness (2)
      - HV4701-4890.9 Protection of animals. Animal rights. Animal welfare (1)
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        HV1551-3024 People with disabilities Including blind, deaf, people with physical and mental disabilities (2)
    - HV7231-9960 Criminal justice administration (4)
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      - HV7551-8280.7 Police. Detectves. Constabulary (1)
- J Political Science (23)
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  - JV1-9480 Colonies and colonization. Emigration and immigration. International migration (1)
- K Law (69)
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    - KB400-4855 Interdisciplinary discussion of subjects (1)
      - KB3098-3121.7 Medical legislation (1)
- L Education (733)
  - L Education (General) (103)
  - LB Theory and practice of education (602)
    - LB1501 Primary Education (2)
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    - LB2300 Higher Education (93)
    - LB2361 Curriculum (281)
    - LB1025-1050.75 Teaching (Principles and practice) (51)
      - LB1032 Group work in education (1)
    - LB1050.9-1091 Educational psychology (1)
    - LB1060 Learning (11)
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- M Music and Books on Music (2)
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- N Fine Arts (103)
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        QA76.75-76.765 Computer software (217)
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- R Medicine (129)
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  - RA Public aspects of medicine (37)
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- T Technology (3794)
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      - TD419-428 Water pollution (1)
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    - TD895-899 Industrial and factory sanitation (2)
  - TE Highway engineering. Roads and pavements (7)
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  - TJ Mechanical Engineering and Machinery (128)
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      - TJ603-695 Locomotives (1)
    - TJ807-830 Renewable energy sources (13)
    - TJ836-927 Hydraulic machinery (2)
    - TJ940-940.5 Vacuum technology (1)
  - TK Electrical engineering. Electronics Nuclear engineering (1252)
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    - TK3001-3521 Distribution or transmission of electric power (27)
    - TK301-399 Electric meters (2)
    - TK4001-4102 Applications of electric power (2)
    - TK4125-4399 Electric lighting (4)
    - TK452-454.4 Electric apparatus and materials. Electric circuits. Electric networks (8)
    - TK4601-4661 Electric heating (1)
    - TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television (560)
    - TK7800-8360 Electronics (418)
      - TK7871 Electronics--Materials (100)
      - TK7885-7895 Computer engineering. Computer hardware (28)
        TK7895.M4 Memory systems (8)
      - TK8300-8360 Photoelectronic devices (General) (30)
    - TK9001-9401 Nuclear engineering. Atomic power (5)
    - TK9900-9971 Electricity for amateurs. Amateur constructors' manuals (2)
  - TL Motor vehicles. Aeronautics. Astronautics (40)
    - TL1-484 Motor vehicles. Cycles (21)
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    - TL787-4050 Astronautics. Space travel (2)
  - TN Mining engineering. Metallurgy (15)
    - TN263-271 Mineral deposits. Metallic ore deposits. Prospecting (2)
    - TN275-325 Practical mining operations. Safety measures (1)
    - TN600-799 Metallurgy (10)
    - TN799.5-948 Nonmetallic minerals (2)
  - TP Chemical technology (57)
    - TP1080-1185 Polymers and polymer manufacture (10)
    - TP155-156 Chemical engineering (7)
    - TP200-248 Chemicals: Manufacture, use, etc. (7)
    - TP250-261 Industrial electrochemistry (1)
    - TP315-360 Fuel (2)
    - TP500-660 Fermentation industries. Beverages. Alcohol (1)
    - TP670-699 Oils, fats, and waxes (3)
      - TP690-692.5 Petroleum refining. Petroleum products (1)
    - TP785-869 Clay industries. Ceramics. Glass (1)
    - TP934-945 Paints, pigments, varnishes, etc. (4)
  - TR Photography (18)
    - TR250-265 Cameras (1)
    - TR624-835 Applied photography Including artistic, commercial, medical photography, photocopying processes (2)
    - TR845-899 Cinematography. Motion pictures (9)
  - TS Manufactures (50)
    - TS1300-1865 Textile industries (7)
    - TS155-194 Production management. Operations management (12)
    - TS1870-1935 Rubber industry (2)
    - TS200-770 Metal manufactures. Metalworking (6)
      - TS695 Chemical vapor deposition (1)
  - TT Handicrafts Arts and crafts (3)
    - TT205-267 Metalworking (1)
    - TT300-382.8 Painting. Wood finishing (1)
  - TX Home economics (27)
    - TX301-339 The house Including arrangement, care, servants (4)
    - TX341-641 Nutrition. Foods and food supply (1)
    - TX642-840 Cooking (1)
    - TX901-946.5 Hospitality industry. Hotels, clubs, restaurants, etc. Food service (2)
- U Military Science (1)
  - U Military Science (General) (1)
- Z Bibliography. Library Science. Information Resources (44)
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