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Library of Congress Subject Areas (265)
- A General Works (5)
  - AC Collections. Series. Collected works (4)
  - AM Museums (General). Collectors and collecting (General) (1)
- B Philosophy. Psychology. Religion (2)
  - BF Psychology (1)
  - BL Religion (1)
- D History General and Old World (2)
  - D History (General) (2)
- H Social Sciences (13)
  - H Social Sciences (General) (3)
  - HB Economic Theory (5)
  - HC Economic History and Conditions (1)
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    - HF5601 Accounting (1)
  - HM Sociology (1)
  - HN Social history and conditions. Social problems. Social reform (2)
  - HT Communities. Classes. Races (1)
- L Education (23)
  - L Education (General) (20)
  - LA History of education (1)
  - LB Theory and practice of education (2)
    - LB1501 Primary Education (1)
    - LB2300 Higher Education (1)
- M Music and Books on Music (1)
  - M Music (1)
- N Fine Arts (18)
  - N Visual arts (General) For photography, see TR (11)
  - NB Sculpture (1)
  - NC Drawing Design Illustration (6)
  - ND Painting (1)
  - NE Print media (5)
  - NK Decorative arts Applied arts Decoration and ornament (1)
  - NX Arts in general (1)
- P Language and Literature (3)
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  - PR English literature (1)
- Q Science (68)
  - Q Science (General) (1)
  - QA Mathematics (66)
    - QA75 Electronic computers. Computer science (66)
  - QC Physics (1)
- R Medicine (1)
  - RV Botanic, Thomsonian, and eclectic medicine (1)
- S Agriculture (2)
  - S Agriculture (General) (2)
  - SB Plant culture (1)
- T Technology (151)
  - T Technology (General) (127)
    - T201 Patents. Trademarks (11)
  - TA Engineering (General). Civil engineering (General) (15)
  - TC Hydraulic engineering. Ocean engineering (2)
  - TD Environmental technology. Sanitary engineering (2)
  - TF Railroad engineering and operation (3)
  - TG Bridge engineering (3)
  - TH Building construction (1)
  - TJ Mechanical engineering and machinery (3)
  - TK Electrical engineering. Electronics Nuclear engineering (2)
  - TL Motor vehicles. Aeronautics. Astronautics (1)
  - TN Mining engineering. Metallurgy (2)
  - TP Chemical technology (1)
  - TR Photography (10)
  - TS Manufactures (1)
  - TT Handicrafts Arts and crafts (2)
  - TX Home economics (3)
- Z Bibliography. Library Science. Information Resources (5)
  - Z665 Library Science. Information Science (3)
  - ZA Information resources (2)
    - ZA4050 Electronic information resources (1)