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Library of Congress Subject Areas (8949)
- A General Works (8)
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- B Philosophy. Psychology. Religion (145)
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    - BF0038-64 Philosophy. Relation to other topics (1)
    - BF0173-175.5 Psychoanalysis (2)
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    - BF0692-692.5 Psychology of sex. Sexual behavior (1)
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    - BP1-253 Islam (6)
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- C Auxiliary Sciences of History (17)
  - C Auxiliary sciences of history (General) (4)
  - CB History of civilization (6)
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      - CB450 Geography and civilization (2)
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- D History General and Old World (538)
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      - DR401-419 General (8)
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      - DR436-446 History General (22)
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      - DR481 Earliest to 1281/1453 (2)
      - DR485-555.7 1281/1453-1789. Fall of Constantinople, 1453 (9)
      - DR511-529 1566-1640. Period of decline (5)
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      - DR556-567 1789-1861. 19th century (16)
      - DR568-575 1861-1909. War with Russia, 1877-1878 (18)
      - DR576-605 20th century. Constitutional movement (23)
      - DR701 Provinces, regions, etc., A-Z (9)
      - DR701-741 Local history and description (European Turkey) (3)
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      - DR741 Other cities, towns, etc., A-Z (3)
    - DR1202-2285 Yugoslavia (1)
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    - DS701-799.9 China (2)
  - DT Africa (4)
- E History America (3)
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- G Geography. Anthropology. Recreation (40)
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- H Social Sciences (1577)
  - H Social Sciences (General) (297)
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    - HD0058.7-58.95 Organizational behavior, change and effectiveness. Corporate culture (33)
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  - HN Social history and conditions. Social problems. Social reform (44)
  - HQ The family. Marriage. Woman (69)
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  - HV Social pathology. Social and public welfare (17)
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    - HV4005-4013 Immigrants (2)
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- J Political Science (720)
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    - JQ 1800-1809 Turkey (10)
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    - JZ1400-1454 Diplomatic and consular service (1)
- K Law (20)
  - (1)
  - K Law in general. Comparative and uniform law. Jurisprudence (18)
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    - KKX Turkey (2)
- L Education (146)
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    - LB2300 Higher Education (29)
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    - LB2801-LB3095 Theory and practice of education--School administration and organization (5)
  - LC Special aspects of education (28)
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- M Music and Books on Music (47)
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- N Fine Arts (357)
  - N Visual arts (General) For photography, see TR (251)
    - N1-58 General (13)
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    - NK1-570 General (3)
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- P Language and Literature (180)
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- Q Science (2310)
  - Q Science (General) (506)
  - QA Mathematics (830)
    - QA075 Electronic computers. Computer science (281)
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    - QB460-466 Astrophysics (143)
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    - QC1 General (45)
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    - QD001-65 General (21)
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- R Medicine (213)
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- S Agriculture (183)
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    - S583-587.73 Agricultural chemistry. Agricultural chemicals (6)
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- T Technology (3570)
  - T Technology (General) (783)
    - T055.4-60.8 Industrial engineering. Management engineering (318)
      - T57.6-57.97 Operations research. Systems analysis (107)
      - T58.4 Managerial control systems (3)
      - T58.5 Information technology (16)
      - T58.6-58.62 Management information systems (17)
    - T174.7 Nanotechnology (87)
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  - TA Engineering (General). Civil engineering (General) (708)
    - TA164 Bioengineering (196)
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    - TA630-695 Structural engineering (General) (18)
  - TC Hydraulic engineering. Ocean engineering (4)
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  - TD Environmental technology. Sanitary engineering (18)
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  - TJ Mechanical engineering and machinery (858)
    - TJ163.12 Mechatronics (339)
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    - TJ210.2-211.47 Mechanical devices and figures. Automata. Ingenious mechanisms. Robots (General) (14)
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    - TJ241-254.7 Machine construction (General) (18)
    - TJ255-265 Heat engines (1)
  - TK Electrical engineering. Electronics Nuclear engineering (1104)
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    - TK7800-8360 Electronics (350)
      - TK7885-7895 Computer engineering. Computer hardware (256)
      - TK8300-8360 Photoelectronic devices (General) (8)
    - TK9001-9401 Nuclear engineering. Atomic power (1)
  - TL Motor vehicles. Aeronautics. Astronautics (42)
    - TL1-484 Motor vehicles. Cycles (6)
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    - TL787-4050 Astronautics. Space travel (2)
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    - TN799.5-948 Nonmetallic minerals (1)
  - TP Chemical technology (276)
    - TP0155-156 Chemical engineering (68)
    - TP0200-248 Chemicals: Manufacture, use, etc. (3)
    - TP0248.13 Biotechnology (46)
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    - TP0785-869 Clay industries. Ceramics. Glass (4)
    - TP1080 Polymers and polymer manufacture (62)
  - TR Photography (49)
    - TR624-835 Applied photography (Including artistic, commercial, medical photography, photocopying processes) (1)
  - TS Manufactures (144)
    - TS0155-194 Production management. Operations management (90)
    - TS0200 Metal manufactures. Metalworking (21)
    - TS1300 Textile industries (4)
  - TT Handicrafts Arts and crafts (2)
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- U Military Science (6)
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- V Naval Science (7)
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    - ZA4050 Electronic information resources (2)