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Library of Congress Subject Areas (1017)
- A General Works (3)
  - AC Collections. Series. Collected works (3)
- L Education (1012)
  - L Education (General) (1012)
  - LA History of education (1)
  - LG Individual institutions (Asia. Africa) (1)
  - LT Textbooks (1)
- Q Science (234)
  - Q Science (General) (233)
  - QA Mathematics (23)
  - QC Physics (15)
- R Medicine (554)
  - R Medicine (General) (553)
  - RC Internal medicine (1)
  - RS Pharmacy and materia medica (234)
  - RV Botanic, Thomsonian, and eclectic medicine (1)
  - RZ Other systems of medicine (2)
- S Agriculture (1)
  - S Agriculture (General) (1)
- T Technology (421)
  - T Technology (General) (415)
  - TA Engineering (General). Civil engineering (General) (25)
  - TC Hydraulic engineering. Ocean engineering (1)
  - TE Highway engineering. Roads and pavements (1)
  - TG Bridge engineering (1)
  - TH Building construction (79)
  - TJ Mechanical engineering and machinery (1)
  - TK Electrical engineering. Electronics Nuclear engineering (66)
  - TS Manufactures (2)