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Library of Congress subjects (95048)
- A General Works (76)
  - AC Collections. Series. Collected works (30)
  - AM Museums (General). Collectors and collecting (General) (29)
  - AS Academies and learned societies (General) (3)
  - AZ History of Scholarship The Humanities (12)
- B Philosophy. Psychology. Religion (5609)
  - B Philosophy (General) (1763)
  - BC Logic (171)
  - BD Speculative Philosophy (57)
  - BF Psychology (2588)
  - BH Aesthetics (10)
  - BJ Ethics (347)
  - BL Religion (667)
  - BM Judaism (13)
  - BP Islam. Bahaism. Theosophy, etc (276)
  - BQ Buddhism (2)
  - BR Christianity (83)
  - BS The Bible (6)
  - BT Doctrinal Theology (7)
  - BV Practical Theology (7)
    - BV1460 Religious Education (2)
  - BX Christian Denominations (33)
- C Auxiliary Sciences of History (190)
  - C Auxiliary sciences of history (General) (14)
  - CB History of civilization (14)
  - CC Archaeology (13)
  - CD Diplomatics. Archives. Seals (16)
    - CD921 Archives (8)
  - CS Genealogy (1)
  - CT Biography (135)
- D History General and Old World (5421)
  - D History (General) (1789)
    - D051 Ancient History (11)
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    - D204 Modern History (319)
    - D501 World War I (120)
    - D731 World War II (93)
    - D839 Post-war History, 1945 on (266)
    - D880 Developing Countries (24)
    - D890 Eastern Hemisphere (16)
    - D901 Europe (General) (528)
  - DA Great Britain (750)
    - DAW Central Europe (28)
  - DB Austria (19)
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  - DD Germany (239)
  - DE The Mediterranean Region. The Greco-Roman World (114)
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    - DJK Eastern Europe (41)
  - DK Russia. Soviet Union. Former Soviet Republics (311)
  - DL Northern Europe. Scandinavia (26)
  - DP Spain (233)
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  - DS Asia (1284)
  - DT Africa (722)
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- E History America (512)
  - E11 America (General) (187)
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- F History United States, Canada, Latin America (405)
  - F001 United States local history (52)
  - F1001 Canada (General) (25)
  - F1201 Latin America (General) (321)
- G Geography. Anthropology. Recreation (5485)
  - G Geography (General) (719)
  - GA Mathematical geography. Cartography (26)
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- H Social Sciences (57377)
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    - HD100 Land Use (471)
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  - HQ The family. Marriage. Woman (4542)
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  - HT Communities. Classes. Races (3807)
  - HV Social pathology. Social and public welfare. Criminology (8532)
  - HX Socialism. Communism. Anarchism (263)
- J Political Science (32835)
  - J General legislative and executive papers (61)
  - JA Political science (General) (6216)
  - JC Political theory (5895)
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    - JN101 Great Britain (6979)
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  - JS Local government Municipal government (977)
  - JV Colonies and colonization. Emigration and immigration. International migration (1597)
  - JX International law (622)
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- K Law (5694)
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    - KDC Scotland (97)
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- L Education (3239)
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  - LD Individual institutions (United States) (10)
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  - LT Textbooks (15)
- M Music and Books on Music (99)
  - M Music (83)
  - ML Literature of music (8)
  - MT Musical instruction and study (8)
- N Fine Arts (458)
  - N Visual arts (General) For photography, see TR (109)
  - NA Architecture (118)
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  - NX Arts in general (120)
- P Language and Literature (4023)
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  - PL Languages and literatures of Eastern Asia, Africa, Oceania (11)
  - PM Hyperborean, Indian, and Artificial languages (4)
  - PN Literature (General) (3651)
    - PN0080 Criticism (101)
    - PN0441 Literary History (21)
    - PN1990 Broadcasting (2669)
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    - PN2000 Dramatic representation. The Theater (28)
  - PQ Romance literatures (1)
  - PR English literature (23)
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  - PT Germanic literature (2)
  - PZ Childrens literature (2)
- Q Science (4402)
  - Q Science (General) (763)
  - QA Mathematics (3142)
    - QA75 Electronic computers. Computer science (906)
    - QA76 Computer software (274)
  - QB Astronomy (9)
  - QC Physics (214)
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  - QH Natural history (205)
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  - QR Microbiology (42)
    - QR180 Immunology (14)
    - QR355 Virology (14)
- R Medicine (9052)
  - R Medicine (General) (726)
  - RA Public aspects of medicine (7594)
    - RA0421 Public health. Hygiene. Preventive Medicine (4451)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (30)
  - RB Pathology (24)
  - RC Internal medicine (515)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (41)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (267)
    - RC1200 Sports Medicine (6)
  - RD Surgery (58)
  - RE Ophthalmology (12)
  - RF Otorhinolaryngology (3)
  - RG Gynecology and obstetrics (205)
  - RJ Pediatrics (216)
    - RJ101 Child Health. Child health services (191)
  - RK Dentistry (3)
  - RM Therapeutics. Pharmacology (211)
  - RS Pharmacy and materia medica (227)
  - RT Nursing (43)
  - RV Botanic, Thomsonian, and eclectic medicine (1)
  - RX Homeopathy (7)
  - RZ Other systems of medicine (126)
- S Agriculture (341)
  - S Agriculture (General) (237)
  - SB Plant culture (11)
  - SD Forestry (31)
  - SF Animal culture (40)
  - SH Aquaculture. Fisheries. Angling (19)
  - SK Hunting sports (1)
- T Technology (3125)
  - T Technology (General) (2530)
    - T201 Patents. Trademarks (74)
  - TA Engineering (General). Civil engineering (General) (39)
  - TC Hydraulic engineering. Ocean engineering (16)
  - TD Environmental technology. Sanitary engineering (75)
  - TE Highway engineering. Roads and pavements (21)
  - TF Railroad engineering and operation (37)
  - TG Bridge engineering (1)
  - TH Building construction (46)
  - TJ Mechanical engineering and machinery (20)
  - TK Electrical engineering. Electronics Nuclear engineering (70)
  - TL Motor vehicles. Aeronautics. Astronautics (30)
  - TN Mining engineering. Metallurgy (33)
  - TP Chemical technology (22)
  - TR Photography (76)
  - TS Manufactures (17)
  - TT Handicrafts Arts and crafts (4)
  - TX Home economics (16)
- U Military Science (449)
  - U Military Science (General) (439)
- V Naval Science (11)
  - V Naval Science (General) (8)
  - VM Naval architecture. Shipbuilding. Marine engineering (1)
- Z Bibliography. Library Science. Information Resources (706)
  - Z004 Books. Writing. Paleography (145)
  - Z665 Library Science. Information Science (170)
  - Z719 Libraries (General) (86)
  - ZA Information resources (331)
    - ZA4050 Electronic information resources (186)
    - ZA4450 Databases (29)