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Library of Congress Subject Areas (334)
- A General Works (1)
- B Philosophy. Psychology. Religion (65)
  - B Philosophy (General) (47)
  - BF Psychology (16)
  - BH Aesthetics (1)
  - BL Religion (11)
  - BP Islam. Bahaism. Theosophy, etc (2)
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    - BV1460 Religious Education (1)
  - BX Christian Denominations (3)
- E History America (2)
- G Geography. Anthropology. Recreation (1)
  - G Geography (General) (1)
- H Social Sciences (54)
  - H Social Sciences (General) (43)
  - HB Economic Theory (1)
  - HC Economic History and Conditions (1)
  - HD Industries. Land use. Labor (2)
    - HD28 Management. Industrial Management (1)
    - HD61 Risk Management (1)
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  - HN Social history and conditions. Social problems. Social reform (27)
  - HQ The family. Marriage. Woman (3)
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  - HV Social pathology. Social and public welfare (29)
- J Political Science (1)
- K Law (2)
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- L Education (20)
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    - LC5201 Education extension. Adult education. Continuing education (1)
  - LF Individual institutions (Europe) (4)
- M Music and Books on Music (5)
  - M Music (5)
- N Fine Arts (26)
  - N Visual arts (General) For photography, see TR (23)
  - NB Sculpture (4)
  - NC Drawing Design Illustration (8)
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  - NK Decorative arts Applied arts Decoration and ornament (5)
  - NX Arts in general (21)
- P Language and Literature (1)
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- Q Science (98)
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  - QA Mathematics (56)
    - QA75 Electronic computers. Computer science (53)
    - QA76 Computer software (39)
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  - QD Chemistry (37)
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    - QH301 Biology (1)
  - QK Botany (2)
  - QM Human anatomy (1)
- R Medicine (23)
  - R Medicine (General) (16)
  - RA Public aspects of medicine (2)
    - RA0421 Public health. Hygiene. Preventive Medicine (1)
  - RB Pathology (1)
  - RC Internal medicine (2)
    - RC1200 Sports Medicine (2)
  - RK Dentistry (1)
  - RT Nursing (5)
  - RZ Other systems of medicine (5)
- S Agriculture (1)
  - S Agriculture (General) (1)
- T Technology (178)
  - T Technology (General) (157)
  - TA Engineering (General). Civil engineering (General) (129)
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  - TD Environmental technology. Sanitary engineering (3)
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  - TJ Mechanical engineering and machinery (36)
  - TK Electrical engineering. Electronics Nuclear engineering (115)
  - TL Motor vehicles. Aeronautics. Astronautics (11)
  - TN Mining engineering. Metallurgy (1)
  - TP Chemical technology (2)
  - TS Manufactures (9)
- U Military Science (1)
  - U Military Science (General) (1)