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Library of Congress Subject Areas (3075)
- A General Works (4)
  - AC Collections. Series. Collected works (4)
  - AI Indexes (General) (1)
  - AS Academies and learned societies (General) (1)
- B Philosophy. Psychology. Religion (35)
  - B Philosophy (General) (8)
  - BF Psychology (27)
- C Auxiliary Sciences of History (2)
  - C Auxiliary sciences of history (General) (1)
  - CB History of civilization (1)
- D History General and Old World (19)
  - D History (General) (13)
  - DT Africa (6)
- G Geography. Anthropology. Recreation (166)
  - G Geography (General) (35)
  - GE Environmental Sciences (131)
  - GF Human ecology. Anthropogeography (1)
- H Social Sciences (1075)
  - H Social Sciences (General) (1021)
  - HA Statistics (4)
  - HC Economic History and Conditions (1)
  - HD Industries. Land use. Labor (25)
    - HD28 Management. Industrial Management (25)
  - HE Transportation and Communications (1)
  - HF Commerce (14)
    - HF5601 Accounting (12)
  - HG Finance (2)
  - HM Sociology (10)
  - HN Social history and conditions. Social problems. Social reform (2)
- J Political Science (31)
  - J General legislative and executive papers (7)
  - JA Political science (General) (20)
  - JQ Political institutions Asia (1)
  - JX International law (1)
  - JZ International relations (2)
- K Law (72)
  - K Law (General) (72)
  - KZ Law of Nations (1)
- L Education (594)
  - L Education (General) (570)
  - LB Theory and practice of education (25)
    - LB1501 Primary Education (2)
    - LB1603 Secondary Education. High schools (10)
    - LB2300 Higher Education (9)
    - LB2361 Curriculum (2)
  - LC Special aspects of education (5)
    - LC5201 Education extension. Adult education. Continuing education (4)
- M Music and Books on Music (2)
  - M Music (2)
- P Language and Literature (272)
  - P Philology. Linguistics (26)
  - PE English (137)
  - PI Oriental languages and literatures (1)
  - PL Languages and literatures of Eastern Asia, Africa, Oceania (70)
  - PN Literature (General) (3)
  - PR English literature (44)
- Q Science (199)
  - Q Science (General) (94)
  - QA Mathematics (78)
    - QA75 Electronic computers. Computer science (5)
  - QC Physics (5)
  - QD Chemistry (12)
  - QE Geology (5)
  - QH Natural history (2)
  - QK Botany (1)
  - QP Physiology (1)
  - QR Microbiology (1)
- R Medicine (213)
  - R Medicine (General) (189)
  - RA Public aspects of medicine (17)
  - RK Dentistry (1)
  - RS Pharmacy and materia medica (1)
  - RT Nursing (9)
- S Agriculture (111)
  - S Agriculture (General) (95)
  - SB Plant culture (2)
  - SD Forestry (1)
  - SF Animal culture (7)
  - SH Aquaculture. Fisheries. Angling (8)
- T Technology (268)
  - T Technology (General) (153)
    - T201 Patents. Trademarks (2)
  - TA Engineering (General). Civil engineering (General) (88)
  - TD Environmental technology. Sanitary engineering (11)
  - TE Highway engineering. Roads and pavements (1)
  - TH Building construction (3)
  - TJ Mechanical engineering and machinery (4)
  - TK Electrical engineering. Electronics Nuclear engineering (6)
  - TL Motor vehicles. Aeronautics. Astronautics (1)
  - TN Mining engineering. Metallurgy (4)
  - TP Chemical technology (3)
  - TX Home economics (4)
- Z Bibliography. Library Science. Information Resources (53)
  - Z665 Library Science. Information Science (30)
  - Z719 Libraries (General) (20)
  - ZA Information resources (3)
    - ZA4450 Databases (2)