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Library of Congress Subject Areas (642)
- B Philosophy. Psychology. Religion (152)
  - B Philosophy (General) (14)
  - BF Psychology (137)
  - BJ Ethics (2)
- D History General and Old World (4)
  - D History (General) (2)
    - D204 Modern History (1)
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- G Geography. Anthropology. Recreation (8)
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- H Social Sciences (61)
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    - HD28 Management. Industrial Management (2)
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- L Education (85)
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  - LC Special aspects of education (8)
- M Music and Books on Music (4)
  - ML Literature of music (3)
  - MT Musical instruction and study (1)
- N Fine Arts (7)
  - N Visual arts (General) For photography, see TR (2)
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- P Language and Literature (17)
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- Q Science (109)
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- R Medicine (36)
  - R Medicine (General) (15)
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    - RC1200 Sports Medicine (7)
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  - RS Pharmacy and materia medica (6)
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- S Agriculture (2)
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- T Technology (223)
  - T Technology (General) (119)
  - TA Engineering (General). Civil engineering (General) (35)
  - TD Environmental technology. Sanitary engineering (1)
  - TH Building construction (4)
  - TJ Mechanical engineering and machinery (4)
  - TK Electrical engineering. Electronics Nuclear engineering (11)
  - TL Motor vehicles. Aeronautics. Astronautics (1)
  - TP Chemical technology (16)
  - TR Photography (47)
  - TS Manufactures (17)
- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (21)
  - Z665 Library Science. Information Science (7)
  - Z719 Libraries (General) (7)
  - ZA Information resources (7)
    - ZA4050 Electronic information resources (5)