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Library of Congress Subject Areas (332)
- A General Works (1)
  - AS Academies and learned societies (General) (1)
- B Philosophy. Psychology. Religion (1)
  - BP Islam. Bahaism. Theosophy, etc (1)
- H Social Sciences (9)
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  - HV Social pathology. Social and public welfare (1)
- L Education (20)
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- N Fine Arts (1)
  - NK Decorative arts Applied arts Decoration and ornament (1)
- P Language and Literature (10)
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- Q Science (295)
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  - QA Mathematics (292)
    - QA75 Electronic computers. Computer science (289)
    - QA76 Computer software (7)
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- R Medicine (5)
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    - RA0421 Public health. Hygiene. Preventive Medicine (1)
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- T Technology (200)
  - T Technology (General) (191)
  - TJ Mechanical engineering and machinery (1)
  - TK Electrical engineering. Electronics Nuclear engineering (15)