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Library of Congress Subject Areas (6831)
- A General Works (210)
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  - AM Museums (General). Collectors and collecting (General) (4)
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- B Philosophy. Psychology. Religion (169)
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- D History General and Old World (8)
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- G Geography. Anthropology. Recreation (17)
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- K Law (17)
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- L Education (1268)
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- M Music and Books on Music (8)
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- R Medicine (5516)
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  - RA Public aspects of medicine (849)
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- Z Bibliography. Library Science. Information Resources (221)
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  - Z665 Library Science. Information Science (60)
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  - ZA Information resources (74)
    - ZA4050 Electronic information resources (5)
    - ZA4450 Databases (39)