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Library of Congress Subject Areas (535)
- A General Works (1)
- B Philosophy. Psychology. Religion (84)
  - B Philosophy (General) (64)
  - BF Psychology (21)
  - BH Aesthetics (1)
  - BJ Ethics (1)
  - BL Religion (12)
  - BP Islam. Bahaism. Theosophy, etc (2)
  - BR Christianity (3)
  - BV Practical Theology (11)
    - BV1460 Religious Education (1)
  - BX Christian Denominations (3)
- D History General and Old World (2)
  - DA Great Britain (2)
- E History America (2)
- G Geography. Anthropology. Recreation (2)
  - G Geography (General) (1)
  - GN Anthropology (1)
- H Social Sciences (103)
  - H Social Sciences (General) (87)
  - HB Economic Theory (4)
  - HC Economic History and Conditions (3)
  - HD Industries. Land use. Labor (3)
    - HD28 Management. Industrial Management (1)
    - HD61 Risk Management (1)
  - HF Commerce (8)
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  - HM Sociology (21)
  - HN Social history and conditions. Social problems. Social reform (48)
  - HQ The family. Marriage. Woman (3)
  - HT Communities. Classes. Races (2)
  - HV Social pathology. Social and public welfare (54)
- J Political Science (1)
- K Law (4)
  - K Law (General) (3)
  - KD England and Wales (1)
- L Education (39)
  - L Education (General) (38)
  - LB Theory and practice of education (11)
    - LB1501 Primary Education (1)
    - LB1603 Secondary Education. High schools (2)
    - LB2300 Higher Education (6)
  - LC Special aspects of education (5)
    - LC5201 Education extension. Adult education. Continuing education (1)
  - LF Individual institutions (Europe) (4)
- M Music and Books on Music (5)
  - M Music (5)
- N Fine Arts (37)
  - N Visual arts (General) For photography, see TR (33)
  - NB Sculpture (4)
  - NC Drawing Design Illustration (8)
  - ND Painting (12)
  - NE Print media (5)
  - NK Decorative arts Applied arts Decoration and ornament (5)
  - NX Arts in general (29)
- P Language and Literature (1)
  - PE English (1)
- Q Science (141)
  - Q Science (General) (66)
  - QA Mathematics (63)
    - QA75 Electronic computers. Computer science (60)
    - QA76 Computer software (45)
  - QC Physics (4)
  - QD Chemistry (51)
  - QH Natural history (1)
    - QH301 Biology (1)
  - QK Botany (2)
  - QM Human anatomy (3)
  - QP Physiology (3)
- R Medicine (47)
  - R Medicine (General) (37)
  - RA Public aspects of medicine (5)
    - RA0421 Public health. Hygiene. Preventive Medicine (4)
  - RB Pathology (2)
  - RC Internal medicine (4)
    - RC1200 Sports Medicine (3)
  - RD Surgery (1)
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  - RM Therapeutics. Pharmacology (1)
  - RS Pharmacy and materia medica (1)
  - RT Nursing (6)
  - RZ Other systems of medicine (6)
- S Agriculture (2)
  - S Agriculture (General) (2)
- T Technology (252)
  - T Technology (General) (229)
  - TA Engineering (General). Civil engineering (General) (190)
  - TC Hydraulic engineering. Ocean engineering (2)
  - TD Environmental technology. Sanitary engineering (3)
  - TG Bridge engineering (5)
  - TH Building construction (4)
  - TJ Mechanical engineering and machinery (37)
  - TK Electrical engineering. Electronics Nuclear engineering (170)
  - TL Motor vehicles. Aeronautics. Astronautics (11)
  - TN Mining engineering. Metallurgy (1)
  - TP Chemical technology (3)
  - TS Manufactures (9)
- U Military Science (1)
  - U Military Science (General) (1)