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Library of Congress Subject Areas (2657)
- A General Works (1)
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- B Philosophy. Psychology. Religion (36)
  - B Philosophy (General) (7)
  - BF Psychology (12)
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- C Auxiliary Sciences of History (7)
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- D History General and Old World (227)
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- E History America (2)
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- N Fine Arts (73)
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- Q Science (647)
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      - QB799-903 Stars (1)
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- R Medicine (17)
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    - R855-855.5 Medical technology (1)
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    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (2)
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- S Agriculture (29)
  - S Agriculture (General) (16)
    - S583-587.73 Agricultural chemistry. Agricultural chemicals (3)
  - SB Plant culture (15)
    - SB183-317 Field crops (7)
- T Technology (988)
  - T Technology (General) (161)
    - T055.4-60.8 Industrial engineering. Management engineering (16)
      - T57.6-57.97 Operations research. Systems analysis (10)
      - T58.5 Information technology (1)
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  - TA Engineering (General). Civil engineering (General) (153)
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  - TF Railroad engineering and operation (3)
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  - TH Building construction (1)
  - TJ Mechanical engineering and machinery (210)
    - TJ163.12 Mechatronics (5)
    - TJ210.2-211.47 Mechanical devices and figures. Automata. Ingenious mechanisms. Robots (General) (3)
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      - TK8300-8360 Photoelectronic devices (General) (4)
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  - TL Motor vehicles. Aeronautics. Astronautics (7)
    - TL500-777 Aeronautics. Aeronautical engineering (1)
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  - TP Chemical technology (56)
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  - TR Photography (12)
  - TS Manufactures (33)
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- U Military Science (2)
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- Z Bibliography. Library Science. Information Resources (9)
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  - ZA Information resources (1)
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