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Library of Congress Subject Areas (340)
- G Geography. Anthropology. Recreation (2)
  - G Geography (General) (2)
- H Social Sciences (1)
  - HF Commerce (1)
    - HF5601 Accounting (1)
- L Education (1)
  - LC Special aspects of education (1)
    - LC5201 Education extension. Adult education. Continuing education (1)
- N Fine Arts (2)
  - NA Architecture (2)
- P Language and Literature (15)
  - P Philology. Linguistics (12)
  - PE English (3)
  - PI Oriental languages and literatures (1)
  - PN Literature (General) (1)
  - PR English literature (1)
- Q Science (236)
  - Q Science (General) (19)
  - QA Mathematics (73)
    - QA75 Electronic computers. Computer science (47)
    - QA76 Computer software (36)
  - QC Physics (71)
  - QD Chemistry (35)
  - QE Geology (10)
  - QH Natural history (23)
    - QH301 Biology (23)
  - QK Botany (1)
  - QM Human anatomy (1)
  - QR Microbiology (17)
- R Medicine (6)
  - R Medicine (General) (3)
  - RA Public aspects of medicine (1)
    - RA0421 Public health. Hygiene. Preventive Medicine (1)
  - RS Pharmacy and materia medica (3)
- S Agriculture (11)
  - S Agriculture (General) (11)
- T Technology (82)
  - T Technology (General) (15)
  - TA Engineering (General). Civil engineering (General) (33)
  - TC Hydraulic engineering. Ocean engineering (2)
  - TD Environmental technology. Sanitary engineering (3)
  - TE Highway engineering. Roads and pavements (1)
  - TG Bridge engineering (1)
  - TH Building construction (2)
  - TJ Mechanical engineering and machinery (5)
  - TK Electrical engineering. Electronics Nuclear engineering (12)
  - TP Chemical technology (7)
  - TR Photography (1)
  - TS Manufactures (5)