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Library of Congress Subject Areas (4195)
- B Philosophy. Psychology. Religion (280)
  - B Philosophy (General) (17)
  - BF Psychology (2)
  - BP Islam. Bahaism. Theosophy, etc (6)
  - BV Practical Theology (5)
    - BV1460 Religious Education (3)
  - Islamic Studies (252)
  - BC Logic (1)
- H Social Sciences (973)
  - H Social Sciences (General) (44)
  - HA Statistics (3)
  - HB Economic Theory (340)
  - HC Economic History and Conditions (37)
  - HD Industries. Land use. Labor (399)
    - HD28 Management. Industrial Management (224)
    - HD61 Risk Management (7)
  - HE Transportation and Communications (117)
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    - HF5601 Accounting (67)
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  - HM Sociology (7)
  - HN Social history and conditions. Social problems. Social reform (5)
  - HQ The family. Marriage. Woman (1)
  - HS Societies secret benevolent etc (1)
  - HT Communities. Classes. Races (5)
- J Political Science (187)
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- K Law (118)
  - K Law (General) (118)
- L Education (113)
  - L Education (General) (96)
  - LA History of education (1)
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    - LB1501 Primary Education (14)
    - LB1603 Secondary Education. High schools (1)
- N Fine Arts (3)
  - NX Arts in general (3)
- P Language and Literature (210)
  - P Philology. Linguistics (4)
  - PE English (198)
  - PL Languages and literatures of Eastern Asia, Africa, Oceania (3)
  - PN Literature (General) (1)
  - PR English literature (7)
- Q Science (386)
  - Q Science (General) (7)
  - QA Mathematics (371)
    - QA75 Electronic computers. Computer science (3)
    - QA76 Computer software (3)
  - QC Physics (7)
  - QM Human anatomy (2)
  - QR Microbiology (1)
- R Medicine (993)
  - R Medicine (General) (44)
  - RA Public aspects of medicine (4)
    - RA0421 Public health. Hygiene. Preventive Medicine (2)
  - RC Internal medicine (2)
  - RE Ophthalmology (1)
  - RG Midwifery (308)
  - RJ Pediatrics (2)
    - RJ101 Child Health. Child health services (2)
  - RM Therapeutics. Pharmacology (1)
  - RT Nursing (642)
  - RZ Other systems of medicine (1)
- S Agriculture (1)
  - S Agriculture (General) (1)
  - SB Plant culture (1)
- T Technology (941)
  - T Technology (General) (617)
    - T201 Patents. Trademarks (11)
  - TA Engineering (General). Civil engineering (General) (182)
  - TC Hydraulic engineering. Ocean engineering (3)
  - TJ Mechanical engineering and machinery (91)
  - TK Electrical engineering. Electronics Nuclear engineering (58)
  - TL Motor vehicles. Aeronautics. Astronautics (2)
  - TN Mining engineering. Metallurgy (2)
  - TP Chemical technology (1)
  - TS Manufactures (6)
- Z Bibliography. Library Science. Information Resources (4)
  - Z665 Library Science. Information Science (1)
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- A General Works (2)
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