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Library of Congress Subject Areas (9970)
- A General Works (23)
  - AC Collections. Series. Collected works (8)
  - AI Indexes (General) (7)
  - AM Museums (General). Collectors and collecting (General) (2)
  - AS Academies and learned societies (General) (6)
  - AZ History of Scholarship The Humanities (3)
- B Philosophy. Psychology. Religion (17)
  - B Philosophy (General) (1)
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  - BP Islam. Bahaism. Theosophy, etc (10)
- C Auxiliary Sciences of History (4)
  - C Auxiliary sciences of history (General) (1)
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- D History General and Old World (2)
  - D History (General) (1)
    - D051 Ancient History (1)
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- G Geography. Anthropology. Recreation (13)
  - G Geography (General) (4)
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- H Social Sciences (3409)
  - H Social Sciences (General) (670)
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  - HB Economic Theory (255)
  - HC Economics (775)
  - HD Industries. Land use. Labor (502)
    - HD1401 Agriculture-Economic aspects (68)
    - HD28 Management. Industrial Management (188)
    - HD30.213 Decision Support Systems (9)
    - HD30.27 Business Forecasting (15)
    - HD30.28 Strategic Planning (34)
    - HD30.3 Communication in Organizations (18)
    - HD38.5 Supply Chain Management (35)
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    - HD62.15 Total Quality Management (24)
    - HD9000 Agricultural Industries (94)
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  - HE Transportation and Communications (27)
  - HF Commerce (1059)
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  - HG Finance (344)
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    - HG4001-4285 Finance management. Business finance. Corporation finance (154)
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- J Political Science (390)
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- K Law (581)
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- L Education (671)
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    - LC5201 Education extension. Adult education. Continuing education (1)
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- M Music and Books on Music (5)
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- N Fine Arts (519)
  - N Visual arts (161)
    - N400-3990 Art museums, galleries, etc. (7)
    - N61-72 Theory. Philosophy. Aesthetics of the visual arts (19)
    - N81-390 Study and teaching. Research (23)
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  - NA Architecture (212)
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  - NX Arts in general (67)
- P Language and Literature (312)
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    - P302-302.87 Discourse analysis (1)
    - P87 Communication. Mass Media (240)
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    - P99 Semiotics. Signs and Symbols (31)
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    - PN0441 Literary History (1)
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- Q Science (683)
  - Q Science (General) (130)
  - QA Mathematics (420)
    - QA76.87 Neural computers (7)
    - QA75 Electronic computers. Computer science (143)
    - QA76 Computer software (63)
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  - QC Physics (17)
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- R Medicine (11)
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    - RA0421 Public health. Hygiene. Preventive Medicine (3)
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  - RS Pharmacy and materia medica (1)
  - RZ Other systems of medicine (1)
- S Agriculture (838)
  - S Agriculture (General) (712)
    - S590-599.9 Soils. Soil science (86)
    - S631-667 Fertilizers and Improvement of the soil (85)
  - SB Plant culture (142)
    - SB599-990.5 Pests and Diseases (30)
    - SB950-989 Pest Control and Treatment of Diseases, Plant Protection (73)
  - SD Forestry (9)
  - SF Animal culture (14)
  - SH Aquaculture. Fisheries. Angling (19)
- T Technology (2962)
  - T Technology (General) (752)
    - T55.4-60.8 Industrial engineering. Management engineering (195)
    - T201 Patents. Trademarks (6)
    - T385 Computer Graphics (35)
    - T58.6-58.62 Management Information Systems (255)
  - TA Engineering (General). Civil engineering (General) (374)
  - TC Hydraulic engineering. Ocean engineering (4)
  - TD Environmental technology. Sanitary engineering (566)
  - TE Highway engineering. Roads and pavements (14)
  - TF Railroad engineering and operation (5)
  - TG Bridge engineering (1)
  - TH Building construction (31)
  - TJ Mechanical engineering and machinery (16)
  - TK Electrical engineering. Electronics Nuclear engineering (77)
    - TK5105 Computer Network (37)
    - TK5105.882 Internet (26)
    - TK5105.888 World Wild Web (30)
  - TL Motor vehicles. Aeronautics. Astronautics (1)
  - TN Mining engineering. Metallurgy (3)
  - TP Chemical technology (1087)
    - TP155 Chemical engineering (778)
    - TP368 Food processing and manufacture (206)
    - TP500 Fermentation industries. Beverages. Alcohol (5)
  - TR Photography (6)
  - TS Manufactures (148)
    - TS 155-194 Production Management, Operations Management (111)
    - TS 180-TS180.8 Material Handling (7)
  - TT Handicrafts Arts and crafts (3)
  - TX Home economics (6)
- U Military Science (6)
  - U Military Science (General) (6)
- V Naval Science (3)
  - VM Naval architecture. Shipbuilding. Marine engineering (3)
- Z Bibliography. Library Science. Information Resources (25)
  - Z004 Books. Writing. Paleography (1)
  - Z665 Library Science. Information Science (13)
  - Z719 Libraries (General) (5)
  - ZA Information resources (9)
    - ZA4050 Electronic information resources (2)
    - ZA4450 Databases (6)