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Library of Congress Subject Areas (58536)
- A General Works (59)
  - AC Collections. Series. Collected works (10)
  - AI Indexes (General) (15)
  - AM Museums (General). Collectors and collecting (General) (13)
  - AS Academies and learned societies (General) (16)
  - AZ History of Scholarship The Humanities (5)
- B Philosophy. Psychology. Religion (22969)
  - B Philosophy (General) (17)
  - BC Logic (12)
  - BD Speculative Philosophy (11)
  - BF Psychology (6)
  - BH Aesthetics (9)
  - BJ Ethics (14)
  - BL Religion (8)
  - BM Judaism (11)
  - BP Islam. Bahaism. Theosophy, etc (17)
  - BQ Buddhism (11)
  - BR Christianity (9)
  - BS The Bible (8)
  - BT Doctrinal Theology (11418)
  - BV Practical Theology (11420)
    - BV1460 Religious Education (11415)
  - BX Christian Denominations (8)
- C Auxiliary Sciences of History (106)
  - C Auxiliary sciences of history (General) (10)
  - CB History of civilization (11)
  - CC Archaeology (7)
  - CD Diplomatics. Archives. Seals (21)
    - CD921 Archives (11)
  - CE Technical chronology. Calendar (5)
  - CJ Numismatics (10)
  - CN Inscriptions. Epigraphy. (12)
  - CR Heraldry (17)
  - CS Genealogy (10)
  - CT Biography (7)
- D History General and Old World (266)
  - D History (General) (93)
    - D051 Ancient History (2)
    - D111 Medieval History (12)
    - D204 Modern History (10)
    - D501 World War I (9)
    - D731 World War II (4)
    - D839 Post-war History, 1945 on (20)
    - D880 Developing Countries (9)
    - D890 Eastern Hemisphere (11)
    - D901 Europe (General) (12)
  - DA Great Britain (21)
    - DAW Central Europe (9)
  - DB Austria (8)
  - DC France (11)
  - DD Germany (10)
  - DE The Mediterranean Region. The Greco-Roman World (9)
  - DF Greece (10)
  - DG Italy (11)
  - DH Netherlands (The Low Countries) (14)
  - DJ Netherlands (Holland) (24)
    - DJK Eastern Europe (14)
  - DK Russia. Soviet Union. Former Soviet Republics (17)
  - DL Northern Europe. Scandinavia (13)
  - DP Spain (11)
  - DR Balkan Peninsula (12)
  - DS Asia (15)
  - DT Africa (2)
  - DU Oceania (South Seas) (14)
- E History America (22)
  - E11 America (General) (11)
  - E151 United States (General) (11)
- F History United States, Canada, Latin America (33)
  - F001 United States local history (13)
  - F1001 Canada (General) (7)
  - F1201 Latin America (General) (13)
- G Geography. Anthropology. Recreation (98)
  - G Geography (General) (12)
  - GA Mathematical geography. Cartography (8)
  - GB Physical geography (12)
  - GC Oceanography (9)
  - GE Environmental Sciences (13)
  - GF Human ecology. Anthropogeography (11)
  - GN Anthropology (11)
  - GR Folklore (10)
  - GT Manners and customs (11)
  - GV Recreation Leisure (11)
- H Social Sciences (23509)
  - H Social Sciences (General) (11)
  - HA Statistics (11416)
  - HB Economic Theory (11911)
  - HC Economic History and Conditions (12)
  - HD Industries. Land use. Labor (44)
    - HD28 Management. Industrial Management (14)
    - HD61 Risk Management (18)
  - HE Transportation and Communications (5)
  - HF Commerce (16)
    - HF5601 Accounting (9)
  - HG Finance (9)
  - HJ Public Finance (15)
  - HM Sociology (10)
  - HN Social history and conditions. Social problems. Social reform (10)
  - HQ The family. Marriage. Woman (16)
  - HS Societies secret benevolent etc (8)
  - HT Communities. Classes. Races (12)
  - HV Social pathology. Social and public welfare (10)
  - HX Socialism. Communism. Anarchism (15)
- J Political Science (136)
  - J General legislative and executive papers (7)
  - JA Political science (General) (5)
  - JC Political theory (16)
  - JF Political institutions (General) (7)
  - JK Political institutions (United States) (18)
  - JL Political institutions (America except United States) (10)
  - JN Political institutions (Europe) (32)
    - JN101 Great Britain (19)
    - JN1187 Scotland (9)
  - JQ Political institutions Asia (11)
  - JS Local government Municipal government (13)
  - JV Colonies and colonization. Emigration and immigration. International migration (5)
  - JX International law (9)
  - JZ International relations (12)
- K Law (58)
  - K Law (General) (15)
  - KD England and Wales (18)
    - KDC Scotland (11)
  - KF United States Federal Law (12)
  - KZ Law of Nations (14)
- L Education (128)
  - L Education (General) (9)
  - LA History of education (11)
  - LB Theory and practice of education (44)
    - LB1501 Primary Education (9)
    - LB1603 Secondary Education. High schools (11)
    - LB2300 Higher Education (8)
    - LB2361 Curriculum (10)
  - LC Special aspects of education (17)
    - LC5201 Education extension. Adult education. Continuing education (8)
  - LD Individual institutions (United States) (12)
  - LE Individual institutions (America except United States) (9)
  - LF Individual institutions (Europe) (8)
  - LG Individual institutions (Asia. Africa) (11)
  - LT Textbooks (11)
- M Music and Books on Music (11440)
  - M Music (11417)
  - ML Literature of music (14)
  - MT Musical instruction and study (10)
- N Fine Arts (22896)
  - N Visual arts (General) For photography, see TR (9)
  - NA Architecture (6)
  - NB Sculpture (13)
  - NC Drawing Design Illustration (11413)
  - ND Painting (7)
  - NE Print media (11425)
  - NK Decorative arts Applied arts Decoration and ornament (18)
  - NX Arts in general (6)
- P Language and Literature (12166)
  - P Philology. Linguistics (12)
  - PA Classical philology (16)
  - PB Modern European Languages (18)
    - PB1501 Gaelic (Scottish Gaelic, Erse) (13)
  - PC Romance languages (11)
  - PD Germanic languages (11)
  - PE English (10)
  - PF West Germanic (17)
  - PG Slavic, Baltic, Albanian languages and literature (11)
  - PH Finno-Ugrian, Basque languages and literatures (9)
  - PI Oriental languages and literatures (11909)
  - PJ Semitic (18)
  - PK Indo-Iranian (9)
  - PL Languages and literatures of Eastern Asia, Africa, Oceania (15)
  - PM Hyperborean, Indian, and Artificial languages (14)
  - PN Literature (General) (61)
    - PN0080 Criticism (8)
    - PN0441 Literary History (19)
    - PN1990 Broadcasting (9)
    - PN1993 Motion Pictures (5)
    - PN2000 Dramatic representation. The Theater (8)
  - PQ Romance literatures (13)
  - PR English literature (7)
  - PS American literature (13)
  - PT Germanic literature (8)
  - PZ Childrens literature (9)
- Q Science (172)
  - Q Science (General) (10)
  - QA Mathematics (27)
    - QA75 Electronic computers. Computer science (4)
    - QA76 Computer software (9)
  - QB Astronomy (12)
  - QC Physics (9)
  - QD Chemistry (6)
  - QE Geology (12)
  - QH Natural history (28)
    - QH301 Biology (5)
    - QH426 Genetics (7)
  - QK Botany (10)
  - QL Zoology (12)
  - QM Human anatomy (11)
  - QP Physiology (14)
  - QR Microbiology (29)
    - QR180 Immunology (10)
    - QR355 Virology (10)
- R Medicine (238)
  - R Medicine (General) (13)
  - RA Public aspects of medicine (31)
    - RA0421 Public health. Hygiene. Preventive Medicine (9)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (12)
  - RB Pathology (12)
  - RC Internal medicine (54)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (13)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (18)
    - RC1200 Sports Medicine (14)
  - RD Surgery (13)
  - RE Ophthalmology (12)
  - RF Otorhinolaryngology (16)
  - RG Gynecology and obstetrics (17)
  - RJ Pediatrics (18)
    - RJ101 Child Health. Child health services (4)
  - RK Dentistry (9)
  - RL Dermatology (10)
  - RM Therapeutics. Pharmacology (9)
  - RS Pharmacy and materia medica (9)
  - RT Nursing (9)
  - RV Botanic, Thomsonian, and eclectic medicine (10)
  - RX Homeopathy (9)
  - RZ Other systems of medicine (6)
- S Agriculture (59)
  - S Agriculture (General) (6)
  - SB Plant culture (9)
  - SD Forestry (10)
  - SF Animal culture (10)
  - SH Aquaculture. Fisheries. Angling (12)
  - SK Hunting sports (15)
- T Technology (173)
  - T Technology (General) (20)
    - T201 Patents. Trademarks (8)
  - TA Engineering (General). Civil engineering (General) (11)
  - TC Hydraulic engineering. Ocean engineering (16)
  - TD Environmental technology. Sanitary engineering (12)
  - TE Highway engineering. Roads and pavements (9)
  - TF Railroad engineering and operation (8)
  - TG Bridge engineering (7)
  - TH Building construction (9)
  - TJ Mechanical engineering and machinery (5)
  - TK Electrical engineering. Electronics Nuclear engineering (10)
  - TL Motor vehicles. Aeronautics. Astronautics (7)
  - TN Mining engineering. Metallurgy (11)
  - TP Chemical technology (10)
  - TR Photography (8)
  - TS Manufactures (14)
  - TT Handicrafts Arts and crafts (12)
  - TX Home economics (15)
- U Military Science (10)
  - U Military Science (General) (10)
- V Naval Science (11427)
  - V Naval Science (General) (10)
  - VM Naval architecture. Shipbuilding. Marine engineering (11418)
- Z Bibliography. Library Science. Information Resources (55)
  - Z004 Books. Writing. Paleography (12)
  - Z665 Library Science. Information Science (8)
  - Z719 Libraries (General) (2)
  - ZA Information resources (33)
    - ZA4050 Electronic information resources (8)
    - ZA4450 Databases (9)