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Library of Congress Subject Areas (4463)
- A General Works (6)
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- B Philosophy. Psychology. Religion (57)
  - B Philosophy (General) (22)
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    - BF0038-64 Philosophy. Relation to other topics (1)
    - BF0176-176.5 Psychological tests and testing (2)
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    - BF0692-692.5 Psychology of sex. Sexual behavior (1)
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    - BP1-253 Islam (4)
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- C Auxiliary Sciences of History (14)
  - C Auxiliary sciences of history (General) (4)
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      - CB450 Geography and civilization (1)
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- D History General and Old World (339)
  - D History (General) (139)
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    - DF501-649 Medieval Greece. Byzantine Empire, 323-1453 (2)
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      - DR701 Provinces, regions, etc., A-Z (4)
      - DR716-739 Istanbul (Constantinople) (10)
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  - DT Africa (3)
- E History America (3)
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- F History United States, Canada, Latin America (1)
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- G Geography. Anthropology. Recreation (29)
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- H Social Sciences (837)
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- J Political Science (344)
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- L Education (87)
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- M Music and Books on Music (4)
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- N Fine Arts (135)
  - N Visual arts (General) For photography, see TR (95)
    - N1-58 General (4)
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- P Language and Literature (107)
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  - PT Germanic - Dutch - Flemish - Afrikaans - Scandinavian - Old Norse - Modern Icelandic - Norwegian - Danish - Swedish literature (1)
    - PT1-4897 German literature (1)
- Q Science (1202)
  - Q Science (General) (188)
  - QA Mathematics (470)
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      - QB799-903 Stars (3)
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    - QC1 General (39)
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- R Medicine (73)
  - R Medicine (General) (55)
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    - R856-857 Biomedical engineering. Electronics. Instrumentation (19)
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- S Agriculture (77)
  - S Agriculture (General) (62)
    - S583-587.73 Agricultural chemistry. Agricultural chemicals (2)
    - S589.7 Agricultural ecology (General) (3)
    - S602.5-604.37 Methods and systems of culture. Cropping systems (1)
    - S605.5 Organic farming. Organiculture (6)
  - SB Plant culture (17)
    - SB183-317 Field crops (7)
  - SD Forestry (2)
  - SF Animal culture (1)
- T Technology (1725)
  - T Technology (General) (333)
    - T055.4-60.8 Industrial engineering. Management engineering (119)
      - T57.6-57.97 Operations research. Systems analysis (53)
      - T58.4 Managerial control systems (3)
      - T58.5 Information technology (10)
      - T58.6-58.62 Management information systems (11)
    - T174.7 Nanotechnology (15)
    - T175 Industrial research. Research and development (4)
  - TA Engineering (General). Civil engineering (General) (241)
    - TA164 Bioengineering (32)
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    - TA401-492 Materials of engineering and construction. Mechanics of materials (46)
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  - TD Environmental technology. Sanitary engineering (7)
    - TD169-171.8 Environmental protection (2)
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  - TK Electrical engineering. Electronics Nuclear engineering (692)
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      - TK7885-7895 Computer engineering. Computer hardware (90)
      - TK8300-8360 Photoelectronic devices (General) (5)
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  - TL Motor vehicles. Aeronautics. Astronautics (23)
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  - TP Chemical technology (148)
    - TP0155-156 Chemical engineering (35)
    - TP0200-248 Chemicals: Manufacture, use, etc. (3)
    - TP0248.13 Biotechnology (25)
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  - TR Photography (24)
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  - TT Handicrafts Arts and crafts (2)
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- U Military Science (5)
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- Z Bibliography. Library Science. Information Resources (11)
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    - ZA4050 Electronic information resources (1)