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Library of Congress Subject Areas (1467)
- A General Works (18)
  - AC Collections. Series. Collected works (11)
  - AI Indexes (General) (1)
  - AM Museums (General). Collectors and collecting (General) (2)
  - AZ History of Scholarship The Humanities (4)
- B Philosophy. Psychology. Religion (109)
  - B Philosophy (General) (70)
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  - BP Islam. Bahaism. Theosophy, etc (14)
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  - BV Practical Theology (6)
  - BX Christian Denominations (1)
- C Auxiliary Sciences of History (3)
  - C Auxiliary sciences of history (General) (1)
  - CB History of civilization (1)
  - CT Biography (1)
- D History General and Old World (9)
  - D History (General) (9)
- E History America (3)
  - E11 America (General) (3)
- F History United States, Canada, Latin America (4)
  - F001 United States local history (4)
- G Geography. Anthropology. Recreation (61)
  - G Geography (General) (41)
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  - GF Human ecology. Anthropogeography (1)
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  - GT Manners and customs (1)
  - GV Recreation Leisure (6)
- H Social Sciences (383)
  - H Social Sciences (General) (221)
  - HA Statistics (7)
  - HB Economic Theory (24)
  - HC Economic History and Conditions (5)
  - HD Industries. Land use. Labor (61)
    - HD28 Management. Industrial Management (14)
    - HD61 Risk Management (2)
  - HE Transportation and Communications (7)
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    - HF5601 Accounting (6)
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  - HN Social history and conditions. Social problems. Social reform (7)
  - HT Communities. Classes. Races (5)
  - HV Social pathology. Social and public welfare (1)
- J Political Science (59)
  - J General legislative and executive papers (29)
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  - JC Political theory (3)
  - JF Political institutions (General) (6)
  - JN Political institutions (Europe) (2)
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  - JS Local government Municipal government (4)
  - JZ International relations (2)
- K Law (89)
  - K Law (General) (77)
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  - KF United States Federal Law (1)
  - KZ Law of Nations (4)
- L Education (289)
  - L Education (General) (201)
  - LA History of education (5)
  - LB Theory and practice of education (86)
    - LB1501 Primary Education (2)
    - LB2300 Higher Education (2)
    - LB2361 Curriculum (1)
  - LC Special aspects of education (28)
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- M Music and Books on Music (7)
  - M Music (7)
- N Fine Arts (10)
  - N Visual arts (General) For photography, see TR (4)
  - NA Architecture (4)
  - NX Arts in general (2)
- P Language and Literature (45)
  - P Philology. Linguistics (32)
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  - PL Languages and literatures of Eastern Asia, Africa, Oceania (4)
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- Q Science (78)
  - Q Science (General) (37)
  - QA Mathematics (27)
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  - QH Natural history (5)
  - QK Botany (4)
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  - QP Physiology (1)
  - QR Microbiology (1)
- R Medicine (80)
  - R Medicine (General) (59)
  - RA Public aspects of medicine (13)
    - RA0421 Public health. Hygiene. Preventive Medicine (1)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (1)
  - RB Pathology (1)
  - RC Internal medicine (2)
  - RG Gynecology and obstetrics (1)
  - RJ Pediatrics (4)
  - RS Pharmacy and materia medica (2)
  - RT Nursing (4)
- S Agriculture (69)
  - S Agriculture (General) (59)
  - SB Plant culture (5)
  - SD Forestry (1)
  - SF Animal culture (2)
  - SH Aquaculture. Fisheries. Angling (7)
- T Technology (160)
  - T Technology (General) (117)
  - TA Engineering (General). Civil engineering (General) (16)
  - TC Hydraulic engineering. Ocean engineering (1)
  - TD Environmental technology. Sanitary engineering (7)
  - TE Highway engineering. Roads and pavements (4)
  - TG Bridge engineering (2)
  - TH Building construction (7)
  - TJ Mechanical engineering and machinery (4)
  - TK Electrical engineering. Electronics Nuclear engineering (4)
  - TL Motor vehicles. Aeronautics. Astronautics (1)
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  - TP Chemical technology (1)
  - TS Manufactures (3)
- U Military Science (10)
  - U Military Science (General) (10)
- V Naval Science (4)
  - V Naval Science (General) (4)