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Library of Congress Subject Areas (833)
- B Philosophy. Psychology. Religion (5)
  - BF Psychology (2)
  - BL Religion (3)
- C Auxiliary Sciences of History (1)
  - CB History of civilization (1)
- D History General and Old World (1)
  - DS Asia (1)
- G Geography. Anthropology. Recreation (8)
  - G Geography (General) (4)
  - GB Physical geography (1)
  - GE Environmental Sciences (8)
- H Social Sciences (122)
  - H Social Sciences (General) (83)
  - HB Economic Theory (27)
  - HC Economic History and Conditions (1)
  - HD Industries. Land use. Labor (30)
    - HD28 Management. Industrial Management (27)
    - HD61 Risk Management (9)
  - HE Transportation and Communications (3)
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    - HF5601 Accounting (6)
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- J Political Science (17)
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- K Law (21)
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- L Education (164)
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    - LB1501 Primary Education (5)
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    - LB2361 Curriculum (1)
- N Fine Arts (24)
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- P Language and Literature (78)
  - P Philology. Linguistics (52)
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- Q Science (279)
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    - QA75 Electronic computers. Computer science (65)
    - QA76 Computer software (61)
  - QC Physics (56)
  - QD Chemistry (61)
  - QE Geology (17)
  - QH Natural history (45)
    - QH301 Biology (43)
    - QH426 Genetics (5)
  - QK Botany (16)
  - QL Zoology (5)
  - QM Human anatomy (26)
  - QR Microbiology (40)
    - QR355 Virology (1)
- R Medicine (111)
  - R Medicine (General) (39)
  - RA Public aspects of medicine (2)
    - RA0421 Public health. Hygiene. Preventive Medicine (1)
  - RC Internal medicine (1)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (1)
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  - RK Dentistry (25)
  - RM Therapeutics. Pharmacology (14)
  - RS Pharmacy and materia medica (43)
  - RT Nursing (4)
- S Agriculture (13)
  - S Agriculture (General) (11)
  - SB Plant culture (3)
- T Technology (187)
  - T Technology (General) (22)
  - TA Engineering (General). Civil engineering (General) (100)
  - TE Highway engineering. Roads and pavements (10)
  - TF Railroad engineering and operation (1)
  - TJ Mechanical engineering and machinery (44)
  - TK Electrical engineering. Electronics Nuclear engineering (38)
  - TN Mining engineering. Metallurgy (11)
  - TP Chemical technology (7)
- U Military Science (2)
  - U Military Science (General) (2)