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Library of Congress Subject Areas (1109)
- A General Works (2)
  - AI Indexes (General) (1)
  - AS Academies and learned societies (General) (1)
- G Geography. Anthropology. Recreation (1)
  - GV Recreation Leisure (1)
- H Social Sciences (710)
  - H Social Sciences (General) (138)
  - HA Statistics (1)
  - HB Economic Theory (96)
  - HC Economic History and Conditions (80)
  - HD Industries. Land use. Labor (183)
    - HD28 Management. Industrial Management (151)
    - HD61 Risk Management (32)
  - HE Transportation and Communications (6)
  - HF Commerce (206)
    - HF5601 Accounting (203)
  - HG Finance (3)
  - HJ Public Finance (3)
  - HT Communities. Classes. Races (3)
  - HV Social pathology. Social and public welfare (1)
  - HX Socialism. Communism. Anarchism (1)
- J Political Science (5)
  - JA Political science (General) (2)
  - JC Political theory (3)
- K Law (23)
  - K Law (General) (23)
- L Education (1)
  - LB Theory and practice of education (1)
    - LB1501 Primary Education (1)
- P Language and Literature (29)
  - PE English (26)
  - PR English literature (3)
- Q Science (49)
  - Q Science (General) (9)
  - QA Mathematics (40)
    - QA75 Electronic computers. Computer science (20)
    - QA76 Computer software (1)
  - QK Botany (1)
- R Medicine (135)
  - R Medicine (General) (7)
  - RA Public aspects of medicine (1)
  - RL Dermatology (1)
  - RM Therapeutics. Pharmacology (1)
  - RS Pharmacy and materia medica (128)
  - RV Botanic, Thomsonian, and eclectic medicine (1)
  - RZ Other systems of medicine (1)
- S Agriculture (29)
  - S Agriculture (General) (29)
- T Technology (128)
  - T Technology (General) (4)
  - TA Engineering (General). Civil engineering (General) (86)
  - TD Environmental technology. Sanitary engineering (1)
  - TE Highway engineering. Roads and pavements (1)
  - TJ Mechanical engineering and machinery (38)
  - TK Electrical engineering. Electronics Nuclear engineering (1)