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Library of Congress Subject Areas (42898)
- A General Works (242)
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- B Philosophy. Psychology. Religion (4419)
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- E History America (105)
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- G Geography. Anthropology. Recreation (1574)
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- M Music and Books on Music (203)
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- N Fine Arts (2205)
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- P Language and Literature (3753)
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- Q Science (12491)
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      - QA76.17 History of computing (2)
      - QA76.575 Multimedia systems (23)
      - QA76.76 Computer software (128)
        QA76.76.I59 Interactive media, hypermedia (21)
      - QA76.76.E95 Expert Systems (Intelligent Knowledge Based Systems) (42)
      - QA76.87 Neural computers, neural networks (53)
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        QA612 Algebraic topology (16)
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  - QB Astronomy (519)
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  - QC Physics (1620)
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      - QC174.26.W28 Topological solitons (5)
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    - QC807 Geophysics (for Applied Geophysics see TN269) (7)
  - QD Chemistry (1180)
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  - QE Geology (29)
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- R Medicine (2565)
  - R Medicine (General) (575)
    - R119.9 Telecommunication in medicine, Telemedicine (8)
    - R723 Medical ethics (11)
    - R729 Types of medical practice (46)
      - R729.5.G4 General practice (42)
    - R857.O6 Optical coherence tomography (248)
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  - RA Public aspects of medicine (668)
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    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (201)
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    - RC667 Diseases of the circulatory (cardiovascular) system (16)
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    - RC1235 Physiology of sports (50)
    - RC78.7.T6 Tomography (1)
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  - RM Therapeutics. Pharmacology (264)
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- S Agriculture (190)
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- T Technology (3289)
  - T Technology (General) (49)
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    - TA 403 Materials Science (37)
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    - TA1637 Image Analysis, Image Processing (118)
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    - TK7800 Electronics (see also: telecommunications) (670)
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        TK7876.5 Millimetre waves (4)
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        TK7882.B56 Biometrics (102)
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  - TL Motor vehicles. Aeronautics. Astronautics (7)
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- U Military Science (12)
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