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Library of Congress Subject Areas (22578)
- A General Works (3)
  - AM Museums (General). Collectors and collecting (General) (1)
  - AS Academies and learned societies (General) (2)
- B Philosophy. Psychology. Religion (668)
  - B Philosophy (General) (9)
  - BF Psychology (273)
  - BH Aesthetics (2)
  - BJ Ethics (77)
  - BL Religion (54)
  - BP Islam. Bahaism. Theosophy, etc (241)
  - BQ Buddhism (11)
  - BR Christianity (11)
  - BV Practical Theology (3)
    - BV1460 Religious Education (3)
- C Auxiliary Sciences of History (24)
  - C Auxiliary sciences of history (General) (1)
  - CB History of civilization (1)
  - CC Archaeology (2)
  - CR Heraldry (1)
  - CT Biography (19)
- D History General and Old World (247)
  - D History (General) (18)
    - D731 World War II (2)
    - D839 Post-war History, 1945 on (1)
    - D880 Developing Countries (1)
  - DD Germany (2)
  - DL Northern Europe. Scandinavia (1)
  - DR Balkan Peninsula (1)
  - DS Asia (228)
  - DU Oceania (South Seas) (1)
- E History America (2)
  - E11 America (General) (2)
- G Geography. Anthropology. Recreation (1396)
  - G Geography (General) (123)
  - GB Physical geography (22)
  - GC Oceanography (33)
  - GE Environmental Sciences (220)
  - GF Human ecology. Anthropogeography (22)
  - GN Anthropology (28)
  - GR Folklore (10)
  - GT Manners and customs (18)
  - GV Recreation Leisure (937)
    - GV557-1198.995 Sports (788)
- H Social Sciences (3921)
  - H Social Sciences (General) (448)
  - HA Statistics (16)
  - HB Economic Theory (254)
  - HC Economic History and Conditions (137)
  - HD Industries. Land use. Labor (1442)
    - HD28 Management. Industrial Management (196)
    - HD58.7-58.95 Organizational behavior, change and effectiveness. Corporate culture (382)
    - HD61 Risk Management (17)
    - HD66-66.2 Work groups. Team work in industry. Quality circles (645)
  - HE Transportation and Communications (43)
  - HF Commerce (467)
    - HF5601 Accounting (29)
  - HG Finance (211)
  - HJ Public Finance (25)
  - HM Sociology (78)
  - HN Social history and conditions. Social problems. Social reform (90)
  - HQ The family. Marriage. Woman (117)
  - HS Societies secret benevolent etc (3)
  - HT Communities. Classes. Races (572)
  - HV Social pathology. Social and public welfare (216)
  - HX Socialism. Communism. Anarchism (5)
- J Political Science (165)
  - J General legislative and executive papers (2)
  - JA Political science (General) (43)
  - JC Political theory (13)
  - JF Political institutions (General) (15)
  - JQ Political institutions Asia (78)
  - JS Local government Municipal government (6)
  - JV Colonies and colonization. Emigration and immigration. International migration (8)
  - JX International law (3)
  - JZ International relations (13)
- K Law (25)
  - K Law (General) (24)
  - KZ Law of Nations (1)
- L Education (8922)
  - L Education (General) (2654)
  - LA History of education (12)
  - LB Theory and practice of education (1378)
    - LB1501 Primary Education (58)
    - LB1603 Secondary Education. High schools (120)
    - LB2300 Higher Education (738)
    - LB2361 Curriculum (73)
    - LB3525-3575 Special days (112)
  - LC Special aspects of education (378)
    - LC237-238.4 College-university and the community (234)
    - LC5201 Education extension. Adult education. Continuing education (60)
  - LF Individual institutions (Europe) (3)
  - LG Individual institutions (Asia. Africa) (5346)
  - LT Textbooks (2)
- M Music and Books on Music (108)
  - M Music (80)
  - ML Literature of music (8)
  - MT Musical instruction and study (20)
- N Fine Arts (261)
  - N Visual arts (General) For photography, see TR (67)
  - NA Architecture (7)
  - NB Sculpture (5)
  - NC Drawing Design Illustration (20)
  - ND Painting (37)
  - NE Print media (4)
  - NK Decorative arts Applied arts Decoration and ornament (18)
  - NX Arts in general (116)
- P Language and Literature (319)
  - P Philology. Linguistics (64)
  - PE English (31)
  - PI Oriental languages and literatures (3)
  - PJ Semitic (3)
  - PL Languages and literatures of Eastern Asia, Africa, Oceania (50)
  - PN Literature (General) (169)
    - PN0441 Literary History (1)
    - PN1990 Broadcasting (16)
    - PN1993 Motion Pictures (29)
    - PN2000 Dramatic representation. The Theater (47)
  - PQ Romance literatures (1)
  - PZ Childrens literature (1)
- Q Science (3322)
  - Q Science (General) (473)
  - QA Mathematics (760)
    - QA75 Electronic computers. Computer science (187)
    - QA76 Computer software (207)
  - QB Astronomy (5)
  - QC Physics (164)
  - QD Chemistry (422)
  - QE Geology (269)
  - QH Natural history (485)
    - QH301 Biology (285)
    - QH426 Genetics (25)
  - QK Botany (440)
  - QL Zoology (282)
  - QM Human anatomy (12)
  - QP Physiology (55)
  - QR Microbiology (173)
    - QR171 Microorganisns in the animal body (8)
    - QR180 Immunology (6)
    - QR355 Virology (2)
    - QR75-99.5 Bacteria (45)
- R Medicine (1027)
  - R Medicine (General) (414)
  - RA Public aspects of medicine (371)
    - RA0421 Public health. Hygiene. Preventive Medicine (165)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (2)
  - RB Pathology (17)
  - RC Internal medicine (190)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (50)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (21)
    - RC1200 Sports Medicine (6)
  - RD Surgery (27)
  - RE Ophthalmology (16)
  - RF Otorhinolaryngology (5)
  - RG Gynecology and obstetrics (20)
  - RJ Pediatrics (25)
    - RJ101 Child Health. Child health services (16)
  - RK Dentistry (7)
  - RL Dermatology (1)
  - RM Therapeutics. Pharmacology (22)
  - RS Pharmacy and materia medica (16)
  - RT Nursing (36)
  - RV Botanic, Thomsonian, and eclectic medicine (7)
  - RZ Other systems of medicine (17)
- S Agriculture (1666)
  - S Agriculture (General) (383)
  - SB Plant culture (449)
  - SD Forestry (215)
  - SF Animal culture (156)
  - SH Aquaculture. Fisheries. Angling (547)
    - SH393 Seagrasses (50)
  - SK Hunting sports (1)
- T Technology (2796)
  - T Technology (General) (252)
    - T201 Patents. Trademarks (13)
  - TA Engineering (General). Civil engineering (General) (254)
  - TC Hydraulic engineering. Ocean engineering (18)
  - TD Environmental technology. Sanitary engineering (348)
  - TE Highway engineering. Roads and pavements (16)
  - TF Railroad engineering and operation (1)
  - TG Bridge engineering (6)
  - TH Building construction (36)
  - TJ Mechanical engineering and machinery (130)
  - TK Electrical engineering. Electronics Nuclear engineering (271)
  - TL Motor vehicles. Aeronautics. Astronautics (11)
  - TN Mining engineering. Metallurgy (12)
  - TP Chemical technology (506)
    - TP368-456 Food processing and manufacture (150)
  - TR Photography (19)
  - TS Manufactures (30)
  - TT Handicrafts Arts and crafts (6)
  - TX Home economics (970)
    - Nutrition. Foods and food supply (939)
- U Military Science (7)
  - U Military Science (General) (7)
- V Naval Science (2)
  - VM Naval architecture. Shipbuilding. Marine engineering (2)
- Z Bibliography. Library Science. Information Resources (17)
  - Z004 Books. Writing. Paleography (7)
  - Z665 Library Science. Information Science (2)
  - Z719 Libraries (General) (4)
  - ZA Information resources (4)
    - ZA4050 Electronic information resources (3)