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Library of Congress Subject Areas (8077)
- A Accountant (3)
- A General Works (61)
  - AC Collections. Series. Collected works (52)
  - AM Museums (General). Collectors and collecting (General) (1)
  - AS Academies and learned societies (General) (4)
  - AZ History of Scholarship The Humanities (4)
- B Philosophy. Psychology. Religion (122)
  - B Philosophy (General) (6)
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  - BF Psychology (97)
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  - BP Islam. Bahaism. Theosophy, etc (8)
- C Auxiliary Sciences of History (4)
  - CB History of civilization (1)
  - CT Biography (3)
- D History General and Old World (163)
  - D History (General) (162)
  - DS Asia (2)
- G Geography (16)
- G Geography. Anthropology. Recreation (149)
  - G Geography (General) (44)
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  - GE Environmental Sciences (6)
  - GF Human ecology. Anthropogeography (1)
  - GN Anthropology (16)
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  - GV Recreation Leisure (42)
- H Social Sciences (629)
  - H Social Sciences (General) (262)
  - HA Statistics (47)
  - HB Economic Theory (36)
  - HC Economic History and Conditions (8)
  - HD Industries. Land use. Labor (57)
    - HD28 Management. Industrial Management (41)
    - HD61 Risk Management (4)
  - HE Transportation and Communications (16)
  - HF Commerce (75)
    - HF5601 Accounting (58)
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  - HN Social history and conditions. Social problems. Social reform (45)
  - HQ The family. Marriage. Woman (48)
  - HT Communities. Classes. Races (13)
  - HV Social pathology. Social and public welfare (20)
- J Political Science (58)
  - J General legislative and executive papers (5)
  - JA Political science (General) (26)
  - JC Political theory (3)
  - JF Political institutions (General) (18)
  - JQ Political institutions Asia (4)
  - JS Local government Municipal government (5)
- K Law (31)
  - K Law (General) (26)
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- L Education (3604)
  - L Education (General) (1992)
  - LA History of education (10)
  - LB Theory and practice of education (1062)
    - LB1501 Primary Education (169)
    - LB1603 Secondary Education. High schools (285)
    - LB2300 Higher Education (34)
    - LB2361 Curriculum (28)
  - LC Special aspects of education (890)
    - LC5201 Education extension. Adult education. Continuing education (47)
- M Music and Books on Music (9)
  - M Music (5)
  - ML Literature of music (5)
  - MT Musical instruction and study (1)
- N Fine Arts (197)
  - N Visual arts (General) For photography, see TR (25)
  - NB Sculpture (1)
  - NC Drawing Design Illustration (18)
  - ND Painting (2)
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  - NK Decorative arts Applied arts Decoration and ornament (73)
  - NX Arts in general (91)
- O Food (137)
- P Language and Literature (549)
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  - PN Literature (General) (106)
    - PN0441 Literary History (4)
    - PN2000 Dramatic representation. The Theater (1)
  - PQ Romance literatures (18)
  - PR English literature (117)
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- Q Science (550)
  - Q Science (General) (124)
  - QA Mathematics (241)
    - QA75 Electronic computers. Computer science (20)
    - QA76 Computer software (12)
  - QC Physics (69)
  - QD Chemistry (52)
  - QH Natural history (55)
    - QH301 Biology (53)
  - QK Botany (10)
  - QL Zoology (3)
  - QP Physiology (4)
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- R Medicine (149)
  - R Medicine (General) (20)
  - RA Public aspects of medicine (17)
    - RA0421 Public health. Hygiene. Preventive Medicine (7)
  - RC Internal medicine (109)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (1)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (1)
    - RC1200 Sports Medicine (105)
  - RJ Pediatrics (5)
    - RJ101 Child Health. Child health services (3)
  - RT Nursing (1)
- S Agriculture (14)
  - S Agriculture (General) (8)
  - SB Plant culture (2)
  - SD Forestry (1)
  - SH Aquaculture. Fisheries. Angling (4)
- S Sport (956)
- T Technology (2552)
  - T Technology (General) (268)
  - TA Engineering (General). Civil engineering (General) (366)
  - TC Hydraulic engineering. Ocean engineering (4)
  - TD Environmental technology. Sanitary engineering (3)
  - TE Highway engineering. Roads and pavements (6)
  - TG Bridge engineering (1)
  - TH Building construction (148)
  - TJ Mechanical engineering and machinery (319)
  - TK Electrical engineering. Electronics Nuclear engineering (638)
  - TL Motor vehicles. Aeronautics. Astronautics (23)
  - TN Mining engineering. Metallurgy (575)
  - TP Chemical technology (1)
  - TS Manufactures (3)
  - TT Handicrafts Arts and crafts (82)
  - TX Home economics (147)
- U Military Science (1)
  - U Military Science (General) (1)
- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (39)
  - Z004 Books. Writing. Paleography (2)
  - Z665 Library Science. Information Science (17)
  - Z719 Libraries (General) (10)
  - ZA Information resources (16)
    - ZA4050 Electronic information resources (5)
    - ZA4450 Databases (4)