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Library of Congress Subject Areas (22263)
- A General Works (3)
  - AM Museums (General). Collectors and collecting (General) (1)
  - AS Academies and learned societies (General) (2)
- B Philosophy. Psychology. Religion (638)
  - B Philosophy (General) (8)
  - BF Psychology (263)
  - BH Aesthetics (2)
  - BJ Ethics (70)
  - BL Religion (53)
  - BP Islam. Bahaism. Theosophy, etc (230)
  - BQ Buddhism (11)
  - BR Christianity (10)
  - 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 (219)
  - 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 (200)
  - DU Oceania (South Seas) (1)
- E History America (2)
  - E11 America (General) (2)
- G Geography. Anthropology. Recreation (1384)
  - G Geography (General) (117)
  - GB Physical geography (21)
  - GC Oceanography (32)
  - GE Environmental Sciences (218)
  - GF Human ecology. Anthropogeography (22)
  - GN Anthropology (28)
  - GR Folklore (9)
  - GT Manners and customs (18)
  - GV Recreation Leisure (935)
    - GV557-1198.995 Sports (787)
- H Social Sciences (3835)
  - H Social Sciences (General) (432)
  - HA Statistics (15)
  - HB Economic Theory (248)
  - HC Economic History and Conditions (131)
  - HD Industries. Land use. Labor (1422)
    - HD28 Management. Industrial Management (195)
    - HD58.7-58.95 Organizational behavior, change and effectiveness. Corporate culture (382)
    - HD61 Risk Management (15)
    - HD66-66.2 Work groups. Team work in industry. Quality circles (641)
  - HE Transportation and Communications (42)
  - HF Commerce (435)
    - HF5601 Accounting (29)
  - HG Finance (205)
  - HJ Public Finance (25)
  - HM Sociology (76)
  - HN Social history and conditions. Social problems. Social reform (89)
  - HQ The family. Marriage. Woman (113)
  - HS Societies secret benevolent etc (3)
  - HT Communities. Classes. Races (564)
  - HV Social pathology. Social and public welfare (213)
  - HX Socialism. Communism. Anarchism (3)
- J Political Science (163)
  - 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 (76)
  - 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 (23)
  - K Law (General) (22)
  - KZ Law of Nations (1)
- L Education (8844)
  - L Education (General) (2626)
  - LA History of education (11)
  - LB Theory and practice of education (1322)
    - LB1501 Primary Education (57)
    - LB1603 Secondary Education. High schools (114)
    - LB2300 Higher Education (693)
    - LB2361 Curriculum (70)
    - 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) (5343)
  - LT Textbooks (1)
- M Music and Books on Music (106)
  - M Music (78)
  - ML Literature of music (8)
  - MT Musical instruction and study (20)
- N Fine Arts (259)
  - N Visual arts (General) For photography, see TR (65)
  - 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 (316)
  - P Philology. Linguistics (64)
  - PE English (30)
  - PI Oriental languages and literatures (3)
  - PJ Semitic (3)
  - PL Languages and literatures of Eastern Asia, Africa, Oceania (49)
  - PN Literature (General) (168)
    - 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 (3225)
  - Q Science (General) (422)
  - QA Mathematics (746)
    - QA75 Electronic computers. Computer science (184)
    - QA76 Computer software (206)
  - QB Astronomy (5)
  - QC Physics (161)
  - QD Chemistry (400)
  - QE Geology (259)
  - QH Natural history (475)
    - QH301 Biology (283)
    - QH426 Genetics (25)
  - QK Botany (421)
  - QL Zoology (279)
  - QM Human anatomy (9)
  - QP Physiology (55)
  - QR Microbiology (169)
    - QR171 Microorganisns in the animal body (7)
    - QR180 Immunology (6)
    - QR355 Virology (2)
    - QR75-99.5 Bacteria (44)
- R Medicine (950)
  - R Medicine (General) (378)
  - RA Public aspects of medicine (352)
    - RA0421 Public health. Hygiene. Preventive Medicine (161)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (2)
  - RB Pathology (17)
  - RC Internal medicine (185)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (47)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (21)
    - RC1200 Sports Medicine (6)
  - RD Surgery (25)
  - RE Ophthalmology (16)
  - RF Otorhinolaryngology (5)
  - RG Gynecology and obstetrics (20)
  - RJ Pediatrics (23)
    - RJ101 Child Health. Child health services (15)
  - RK Dentistry (7)
  - RL Dermatology (1)
  - RM Therapeutics. Pharmacology (21)
  - RS Pharmacy and materia medica (16)
  - RT Nursing (7)
  - RV Botanic, Thomsonian, and eclectic medicine (7)
  - RZ Other systems of medicine (17)
- S Agriculture (1634)
  - S Agriculture (General) (375)
  - SB Plant culture (435)
  - SD Forestry (214)
  - SF Animal culture (147)
  - SH Aquaculture. Fisheries. Angling (541)
    - SH393 Seagrasses (50)
  - SK Hunting sports (1)
- T Technology (2742)
  - T Technology (General) (234)
    - T201 Patents. Trademarks (13)
  - TA Engineering (General). Civil engineering (General) (251)
  - TC Hydraulic engineering. Ocean engineering (17)
  - TD Environmental technology. Sanitary engineering (343)
  - TE Highway engineering. Roads and pavements (16)
  - TF Railroad engineering and operation (1)
  - TG Bridge engineering (5)
  - TH Building construction (34)
  - TJ Mechanical engineering and machinery (130)
  - TK Electrical engineering. Electronics Nuclear engineering (265)
  - TL Motor vehicles. Aeronautics. Astronautics (11)
  - TN Mining engineering. Metallurgy (9)
  - TP Chemical technology (495)
    - TP368-456 Food processing and manufacture (146)
  - TR Photography (18)
  - TS Manufactures (30)
  - TT Handicrafts Arts and crafts (6)
  - TX Home economics (959)
    - Nutrition. Foods and food supply (929)
- 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 (16)
  - Z004 Books. Writing. Paleography (7)
  - Z665 Library Science. Information Science (2)
  - Z719 Libraries (General) (4)
  - ZA Information resources (3)
    - ZA4050 Electronic information resources (2)