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Library of Congress Subject Areas (455)
- B Philosophy. Psychology. Religion (1)
  - BF Psychology (1)
- H Social Sciences (3)
  - HD Industries. Land use. Labor (3)
    - HD28 Management. Industrial Management (2)
    - HD61 Risk Management (1)
- Q Science (56)
  - Q Science (General) (11)
  - QD Chemistry (13)
  - QH Natural history (2)
    - QH301 Biology (2)
  - QK Botany (2)
  - QL Zoology (27)
  - QP Physiology (1)
  - QR Microbiology (2)
- R Medicine (176)
  - R Medicine (General) (4)
  - RA Public aspects of medicine (104)
    - RA0421 Public health. Hygiene. Preventive Medicine (88)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (4)
  - RB Pathology (1)
  - RC Internal medicine (38)
    - RC1200 Sports Medicine (1)
  - RG Gynecology and obstetrics (2)
  - RJ Pediatrics (9)
    - RJ101 Child Health. Child health services (4)
  - RM Therapeutics. Pharmacology (14)
  - RS Pharmacy and materia medica (3)
  - RZ Other systems of medicine (2)
- S Agriculture (161)
  - S Agriculture (General) (71)
  - SB Plant culture (22)
  - SD Forestry (9)
  - SF Animal culture (63)
  - SH Aquaculture. Fisheries. Angling (17)
- T Technology (81)
  - T Technology (General) (1)
  - TA Engineering (General). Civil engineering (General) (8)
  - TD Environmental technology. Sanitary engineering (11)
  - TH Building construction (6)
  - TJ Mechanical engineering and machinery (4)
  - TK Electrical engineering. Electronics Nuclear engineering (5)
  - TP Chemical technology (40)
  - TS Manufactures (7)
  - TX Home economics (3)