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Library of Congress Subject Areas (6211)
- A General Works (14)
  - AC Collections. Series. Collected works (4)
  - AI Indexes (General) (3)
  - AM Museums (General). Collectors and collecting (General) (2)
  - AS Academies and learned societies (General) (5)
  - AZ History of Scholarship The Humanities (1)
- B Philosophy. Psychology. Religion (10)
  - BF Psychology (3)
  - BP Islam. Bahaism. Theosophy, etc (7)
- C Auxiliary Sciences of History (2)
  - C Auxiliary sciences of history (General) (1)
  - CC Archaeology (1)
- D History General and Old World (1)
  - D History (General) (1)
    - D051 Ancient History (1)
- G Geography. Anthropology. Recreation (7)
  - G Geography (General) (2)
  - GA Mathematical geography. Cartography (1)
  - GB Physical geography (1)
  - GE Environmental Sciences (1)
  - GR Folklore (2)
  - GV Recreation Leisure (1)
- H Social Sciences (2343)
  - H Social Sciences (General) (464)
  - HA Statistics (3)
  - HB Economic Theory (177)
  - HC Economics (430)
  - HD Industries. Land use. Labor (311)
    - HD1401 Agriculture-Economic aspects (24)
    - HD28 Management. Industrial Management (141)
    - HD30.213 Decision Support Systems (6)
    - HD30.27 Business Forecasting (5)
    - HD30.28 Strategic Planning (15)
    - HD30.3 Communication in Organizations (10)
    - HD38.5 Supply Chain Management (19)
    - HD59-59.6 Public relations. Industrial publicity (5)
    - HD61 Risk Management (4)
    - HD62.15 Total Quality Management (10)
    - HD9000 Agricultural Industries (56)
    - HD9980 Service Industries (8)
  - HE Transportation and Communications (11)
  - HF Commerce (792)
    - HF5001 Business. Business Administration (144)
    - HF5410 Marketing. Distribution of Products (217)
    - HF5415.5 Customer services (18)
    - HF5549 Personnel Management. Employment Management (128)
    - HF5601 Accounting (287)
    - HF5681.T3 Tax Accounting (24)
    - HF5686.C8 Cost Accounting (4)
  - HG Finance (236)
    - HG1501-3550 Banking (11)
    - HG1706-1708 Accounting. Bookkeeping (56)
    - HG1709 Data processing (4)
    - HG4001-4285 Finance management. Business finance. Corporation finance (98)
    - HG4501-6051 Investment, capital formation, speculation (52)
  - HJ Public Finance (37)
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  - HM Sociology (2)
  - HN Social history and conditions. Social problems. Social reform (41)
  - HQ The family. Marriage. Woman (10)
  - HT Communities. Classes. Races (7)
  - HV Social pathology. Social and public welfare (15)
- J Political Science (256)
  - J General legislative and executive papers (1)
  - JA Political science (General) (27)
    - JA51 Public management (16)
  - JC Political theory (7)
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    - JF1501-1521 Civil service (25)
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  - JQ Political institutions Asia (14)
    - JQ224 Public policy and administration (14)
  - JS Local government Municipal government (2)
  - JV Colonies and colonization. Emigration and immigration. International migration (1)
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  - JZ International relations (112)
- K Law (379)
  - K Law (General) (371)
  - KD England and Wales (2)
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- L Education (295)
  - L Education (General) (285)
  - LB Theory and practice of education (10)
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    - LB1603 Secondary Education. High schools (3)
    - LB2300 Higher Education (3)
  - LC Special aspects of education (1)
- M Music and Books on Music (3)
  - M Music (2)
  - MT Musical instruction and study (1)
- N Fine Arts (290)
  - N Visual arts (73)
    - N400-3990 Art museums, galleries, etc. (5)
    - N61-72 Theory. Philosophy. Aesthetics of the visual arts (8)
    - N81-390 Study and teaching. Research (6)
    - N8600-8675 Economics of art (2)
  - NA Architecture (129)
    - NA2695-2793 Architectural drawing and design (53)
    - NA2400-2460 Museums. Exhibitions (7)
  - NB Sculpture (1)
  - NC Drawing Design Illustration (64)
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  - NE Print media (18)
  - NK Decorative arts Applied arts Decoration and ornament (11)
  - NX Arts in general (8)
- P Language and Literature (260)
  - P Philology. Linguistics (250)
    - P87 Communication. Mass Media (212)
    - P94.7 Interpersonal communication (14)
    - P95-95.6 Oral communication. Speech (1)
    - P99 Semiotics. Signs and Symbols (23)
    - P99.5 Non Verbal communication (4)
  - PE English (4)
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    - PN1990 Broadcasting (2)
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  - PR English literature (1)
- Q Science (424)
  - Q Science (General) (50)
  - QA Mathematics (317)
    - QA76.87 Neural computers (4)
    - QA75 Electronic computers. Computer science (102)
    - QA76 Computer software (29)
    - QA76.6 Computer Programming (84)
    - QA76.625 Internet Programming (111)
    - QA76.76.E95 Expert Systems (13)
    - QA76.9 .A25 Computer Security (11)
  - QC Physics (5)
  - QD Chemistry (51)
  - QE Geology (1)
  - QK Botany (9)
  - QR Microbiology (5)
- R Medicine (8)
  - R Medicine (General) (3)
  - RA Public aspects of medicine (3)
    - RA0421 Public health. Hygiene. Preventive Medicine (3)
  - RG Gynecology and obstetrics (1)
  - RZ Other systems of medicine (1)
- S Agriculture (411)
  - S Agriculture (General) (356)
    - S590-599.9 Soils. Soil science (18)
    - S631-667 Fertilizers and Improvement of the soil (35)
  - SB Plant culture (46)
    - SB599-990.5 Pests and Diseases (6)
    - SB950-989 Pest Control and Treatment of Diseases, Plant Protection (23)
  - SD Forestry (4)
  - SF Animal culture (8)
  - SH Aquaculture. Fisheries. Angling (12)
- T Technology (1735)
  - T Technology (General) (354)
    - T55.4-60.8 Industrial engineering. Management engineering (109)
    - T201 Patents. Trademarks (3)
    - T385 Computer Graphics (16)
    - T58.6-58.62 Management Information Systems (140)
  - TA Engineering (General). Civil engineering (General) (253)
  - TC Hydraulic engineering. Ocean engineering (2)
  - TD Environmental technology. Sanitary engineering (381)
  - TE Highway engineering. Roads and pavements (5)
  - TF Railroad engineering and operation (1)
  - TH Building construction (16)
  - TJ Mechanical engineering and machinery (7)
  - TK Electrical engineering. Electronics Nuclear engineering (43)
    - TK5105 Computer Network (29)
    - TK5105.882 Internet (9)
    - TK5105.888 World Wild Web (10)
  - TN Mining engineering. Metallurgy (2)
  - TP Chemical technology (637)
    - TP155 Chemical engineering (424)
    - TP368 Food processing and manufacture (124)
    - TP500 Fermentation industries. Beverages. Alcohol (4)
  - TR Photography (5)
  - TS Manufactures (68)
    - TS 155-194 Production Management, Operations Management (51)
    - TS 180-TS180.8 Material Handling (4)
  - TT Handicrafts Arts and crafts (3)
  - TX Home economics (5)
- U Military Science (2)
  - U Military Science (General) (2)
- V Naval Science (2)
  - VM Naval architecture. Shipbuilding. Marine engineering (2)
- Z Bibliography. Library Science. Information Resources (9)
  - Z004 Books. Writing. Paleography (2)
  - Z665 Library Science. Information Science (1)
  - Z719 Libraries (General) (4)
  - ZA Information resources (2)
    - ZA4050 Electronic information resources (2)