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Library of Congress Subject Areas (7211)
- A General Works (54)
  - AC Collections. Series. Collected works (44)
    - AC1-195 Collections of Monographs, Essays, etc. (10)
  - AN Newspapers (General) (9)
  - AS Academies and learned societies (General) (2)
- B Philosophy. Psychology. Religion (39)
  - B Philosophy (General) (3)
  - BD Speculative Philosophy (2)
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  - BP Islam. Bahaism. Theosophy, etc (1)
  - BV Practical Theology (1)
  - BF Psychology (General) (30)
    - BF1-990 Psychology (2)
- C Auxiliary Sciences of History (1)
  - CJ Numismatics (1)
- G Geography. Anthropology. Recreation (44)
  - GA Mathematical geography. Cartography (2)
    - GA1-1776 Mathematical geography. Cartography (1)
      - GA101-1776 Cartography (1)
  - G Geography (21)
    - G1-922 Geography (General) (8)
  - GB Physical geography (General) (1)
  - GE Environmental Sciences (General) (11)
    - GE1-350 Environmental sciences (5)
      - GE170-190 Environmental policy (1)
      - GE195-199 Environmentalism. Green movement (1)
      - GE300-350 Environmental management (2)
  - GF Human ecology. Anthropogeography (General) (1)
    - GF1-900 Human ecology. Anthropogeography (1)
      - GF75 Human influences on the environment (1)
  - GN Anthropology (General) (2)
  - GR Folklore (General) (1)
  - GT Manners and customs (General) (2)
  - GV Recreation Leisure (General) (3)
    - GV1-1860 Recreation. Leisure (1)
      - GV1199-1570 Games and amusements (1)
- H Social Sciences (1621)
  - HA Statistics (4)
    - HA1-4737 Statistics (General) (2)
      - HA29-32 Theory and method of social science statistics (1)
      - HA38-39 Registration of vital events. Vital records (1)
  - HB Economic theory. Demography (96)
    - HB71-74 Economics as a science. Relation to other subjects (1)
    - HB172.5 Macroeconomics (2)
    - HB221-236 Price (1)
    - HB3711-3840 Business cycles. Economic fluctuations (1)
    - HB522-715 Income. Factor shares (14)
      - HB615-715 Entrepreneurship. Risk and uncertainty. Property (13)
    - HB848-3697 Demography. Population. Vital events (1)
  - HC Economic History and Conditions (68)
    - HC79 Special Topics. Including air pollution, automation, consumer demand, famines, flow of funds, etc. (45)
  - HD Industries. Land use. Labor (592)
    - HD28-70 Management. Industrial Management (335)
      - HD30.23 Decision making (12)
      - HD38.5 Business logistics (4)
      - HD47-47.4 Costs (1)
      - HD49-49.5 Crisis management. Emergency management. Inflation (2)
      - HD53 Intellectual work. Intellectual capital (6)
      - HD57.7 Leadership (5)
      - HD58.7-58.95 Organizational behavior, change and effectiveness. Corporate culture (14)
      - HD60-60.5 Social responsibility of business (5)
      - HD61 Risk in industry. Risk management (43)
      - HD62 Standardization. Simplification. Waste (4)
      - HD69 Other Including business consultants, capacity, size of industries, etc. (3)
    - HD2321-4730.9 Industry (118)
      - HD2340.8-2346.5 Small and medium-sized businesses, artisans, handicrafts, trades (117)
    - HD2350.8-2356 Large industry. Factory system. Big business (20)
      - HD2365-2385 Contracting. Letting of contracts (1)
      - HD2709-2930.7 Corporations. Including international business enterprises, diversification, industrial concentration, public utilities (19)
        HD2741 Holding companies. Corporate governance (14)
        HD2744 Corporations—Investor relations (2)
    - HD4801-8943 Labor. Work. Working class (13)
      - HD4909-5100.9 Wages (2)
      - HD6050-6305 Classes of labor Including women, children, students, middle-aged and older persons, minorities (1)
      - HD6350-6940.7 Trade unions. Labor unions. Workers' associations (1)
      - HD7088-7252 Social insurance. Social security. Pension (1)
      - HD7255-7256 Vocational rehabilitation. Employment of people with disabilities (1)
    - HD72-88 Economic growth, development, planning (5)
    - HD9000-9999 Special industries and trades (12)
  - HE Transportation and Communications (51)
    - HE1-9990 Transportation and communications (General) (2)
      - HE331-380 Traffic engineering. Roads and highways. Streets (2)
  - HF Commerce (415)
    - HF1701-2701 Tariff. Free trade. Protectionism (1)
    - HF5001-6182 Business (354)
      - HF5381-5386 Vocational guidance. Career devlopment (3)
      - HF5410-5417.5 Marketing. Distribution of products (183)
      - HF5428-5429.6 Retail trade (3)
      - HF5437-5444 Purchasing. Selling. Sales personnel. Sales executives (1)
      - HF5460-5469.5 Department stores. Mail order business. Supermarkets. Convenience stores (1)
      - HF5469.7-5481 Markets. Fairs (1)
      - HF5546-5548.6 Office management (57)
        HF5548.32-.34 Electronic commerce (11)
      - HF5548.7-5548.85 Industrial psychology (37)
      - HF5549-5549.5 Personnel management. Employment management (30)
      - HF5601-5689 Accounting. Bookkeeping (20)
      - HF5801-6182 Advertising (5)
  - HG Finance (272)
    - HG1710 Electronic Funds Transfers (82)
    - HG1501-3550 Banking (8)
      - HG1656 Bank reserves. Bank liquidity. Loan loss reserves (1)
      - HG1706-1708 Accounting. Bookkeeping (1)
      - HG1710-1710.5 Electronic funds transfers (1)
    - HG178 Liquidity (3)
    - HG201-1496 Money (3)
    - HG3691-3769 Credit. Debt. Loans. Including credit institutions, credit instruments, consumer credit, bankruptcy (5)
    - HG3810-4000 Foreign exchange. International finance. International monetary system (3)
    - HG4001-4285 Finance management. Business finance. (17)
    - HG4501-6051 Investment, capital formation, speculation (30)
      - HG4538 Foreign investments (3)
      - HG4551-4598 Stock exchanges (12)
      - HG4621 Stockbrokers. Security dealers. Investment advisers (1)
      - HG6001-6051 Speculation (2)
    - HG8011-9999 Insurance (2)
      - HG9371-9399 Health insurance (1)
  - HJ Public Finance (5)
  - HN Social history and conditions. Social problems. Social reform (4)
  - HQ The family. Marriage. Woman (5)
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      - HQ1060-1064 Aged. Gerontology (Social aspects). Retirement (1)
      - HQ793-799.2 Youth. Adolescents. Teenagers (2)
  - HT Communities. Classes. Races (1)
  - HX Socialism. Communism. Anarchism (1)
  - H1-99 Social Sciences (General) (94)
  - HM Sociology (33)
    - HM1176-1281 Social influence. Social pressure (4)
    - HM621-656 Culture (3)
    - HM701 Social systems (2)
    - HM711-806 Groups and organizations (1)
  - HV Social pathology. Social and public welfare. Criminology (19)
    - HV551.2-639 Emergency management (2)
    - HV6001-7220.5 Criminology (9)
      - HV6035-6197 Criminal anthropology Including criminal types, criminal psychology, prison psychology, causes of crime (8)
      - HV6251-6773.55 Crimes and offenses (1)
    - HV675-677 Accidents. Prevention of accidents (1)
    - HV697-4959 Protection, assistance and relief (1)
      - HV3176-3199 Special classes. By race or ethnic group (1)
- J Political Science (12)
  - JF Political institutions (General) (7)
    - JF20-2112 Political institutions and public administration (2)
      - JF1338-2112 Public administration (2)
  - JA1-92 Political science (General) (2)
  - JQ21-6651 Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.) (2)
  - JV1-9480 Colonies and colonization. Emigration and immigration. International migration (1)
- K Law (33)
  - K Law (General) (31)
    - K(176)-(177) Collected works (nonserial) (1)
    - K201-487 Jurisprudence. Philosophy and theory of law (1)
    - K85-89 Legal research (1)
  - KZ Law of Nations (2)
- L Education (634)
  - L Education (General) (102)
  - LB Theory and practice of education (522)
    - LB1501 Primary Education (2)
    - LB1603 Secondary Education. High schools (7)
    - LB2300 Higher Education (74)
    - LB2361 Curriculum (281)
    - LB1025-1050.75 Teaching (Principles and practice) (27)
      - LB1032 Group work in education (1)
    - LB2300-2430 Higher education (1)
  - LC Special aspects of education (13)
    - LC5201 Education extension. Adult education. Continuing education (4)
- M Music and Books on Music (1)
  - MT Musical instruction and study (1)
- N Fine Arts (82)
  - NA Architecture (3)
  - NC Drawing Design Illustration (2)
  - ND Painting (1)
  - NE Print media (1)
  - NK Decorative arts Applied arts Decoration and ornament (6)
  - NX Arts in general (3)
  - N Visual arts (69)
- P Language and Literature (35)
  - P Philology. Linguistics (20)
  - PE English (6)
  - PL Languages and literatures of Eastern Asia, Africa, Oceania (2)
  - PN Literature (General) (7)
    - PN1990 Broadcasting (2)
    - PN1993 Motion Pictures (2)
    - PN2000 Dramatic representation. The Theater (2)
- Q Science (2070)
  - Q Science (General) (263)
    - Q300-390 Cybernetics (31)
  - QA Mathematics (1448)
    - QA1-43 General (8)
    - QA150-272.5 Algebra (6)
    - QA273-280 Probabilities. Mathematical statistics (21)
    - QA299.6-433 Analysis (40)
    - QA440-699 Geometry. Trigonometry. Topology (2)
    - QA71-90 Instruments and machines (1297)
      - QA75-76.95 Calculating machines (5)
      - QA75.5-76.95 Electronic computers. Computer science (1289)
        QA76.75-76.765 Computer software (203)
    - QA801-939 Analytic mechanics (2)
  - QB Astronomy (2)
  - QD Chemistry (72)
    - QD1-65 General Including alchemy (1)
    - QD146-197 Inorganic chemistry (3)
    - QD241-441 Organic chemistry (5)
    - QD450-801 Physical and theoretical chemistry (5)
    - QD71-142 Analytical chemistry (1)
    - QD901-999 Crystallography (1)
  - QE Geology (5)
  - QH Natural history (21)
    - QH301 Biology (11)
    - QH426 Genetics (1)
  - QM Human anatomy (1)
  - QP Physiology (17)
    - QP351 Neurophysiology and Neuropsychology (4)
  - QR Microbiology (10)
  - QC Physics (266)
    - QC 1-75 General (4)
    - QC170-197 Atomic physics. Constitution and properties of matter Including molecular physics, relativity, quantum theory, and solid state physics (7)
    - QC251-338.5 Heat (4)
      - QC310.15-319 Thermodynamics (1)
    - QC350-467 Optics. Light (7)
    - QC474-496.9 Radiation physics (General) (3)
    - QC501-766 Electricity and magnetism (17)
      - QC501-(721) Electricity (12)
        QC676-678.6 Radio waves (Theory) (1)
        QC701-715.4 Electric discharge (1)
        QC717.6-718.8 Plasma physics. Ionized gases (3)
      - QC750-766 Magnetism (3)
    - QC770-798 Nuclear and particle physics. Atomic energy. Radioactivity (8)
      - QC793-793.5 Elementary particle physics (4)
      - QC794.95-798 Radioactivity and radioactive substances (3)
- R Medicine (77)
  - R Medicine (General) (27)
    - R855-855.5 Medical technology (1)
    - R856-857 Biomedical engineering. Electronics. Instrumentation (3)
    - R858-859.7 Computer applications to medicine. Medical informatics (2)
  - RA Public aspects of medicine (19)
    - RA0421 Public health. Hygiene. Preventive Medicine (14)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (2)
  - RB Pathology (1)
  - RC Internal medicine (17)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (2)
    - RC1200 Sports Medicine (1)
    - RC71-78.7 Examination. Diagnosis (7)
  - RD Surgery (1)
  - RE Ophthalmology (1)
  - RG Gynecology and obstetrics (4)
    - RG491 Diseases of the Breast (4)
  - RM Therapeutics. Pharmacology (3)
  - RS Pharmacy and materia medica (3)
  - RT Nursing (1)
- S Agriculture (5)
  - S Agriculture (General) (1)
  - SB Plant culture (1)
  - SF Animal culture (3)
    - SF951 Diseases of Special Classes of Animals (2)
- T Technology (3146)
  - T Technology (General) (1275)
    - T201 Patents. Trademarks (1)
    - T351 Mechanical drawing. Engineering graphics (14)
  - TA Engineering (General). Civil engineering (General) (844)
    - TA1001-1280 Transportation engineering (2)
    - TA1501-1820 Applied optics. Photonics (82)
    - TA164 Bioengineering (1)
    - TA165 Engineering instruments, meters, etc. Industrial instrumentation (2)
    - TA166-167 Human engineering (2)
    - TA168 Systems engineering (2)
    - TA177.4-185 Engineering economy (1)
    - TA2001-2040 Plasma engineering (1)
    - TA329-348 Engineering mathematics. Engineering analysis (5)
    - TA349-359 Mechanics of engineering. Applied mechanics (4)
    - TA365-367 Acoustics in engineering. Acoustical engineering (1)
    - TA401-492 Materials of engineering and construction. Mechanics of materials (29)
    - TA630-695 Structural engineering (General) (3)
    - TA703-712 Engineering geology. Rock mechanics. Soil mechanics. Underground construction (1)
  - TC Hydraulic engineering. Ocean engineering (5)
  - TD Environmental technology. Sanitary engineering (14)
    - TD169-171.8 Environmental protection (2)
    - TD172-193.5 Environmental pollution (1)
    - TD201-500 Water supply for domestic and industrial purposes (1)
      - TD419-428 Water pollution (1)
    - TD783-812.5 Municipal refuse. Solid wastes (1)
    - TD878-894 Special types of environment Including soil pollution, air pollution, noise pollution (1)
  - TE Highway engineering. Roads and pavements (3)
    - TE177-178.8 Roadside development. Landscaping (1)
  - TH Building construction (6)
    - TH2025-3000 Details in building design and construction Including walls, roofs (1)
    - TH7005-7699 Heating and ventilation. Air conditioning (1)
    - TH845-895 Architectural engineering. Structural engineering of buildings (1)
  - TJ Mechanical Engineering and Machinery (99)
    - TJ1040-1119 Machinery exclusive of prime movers (3)
    - TJ1125-1345 Machine shops and machine shop practice (1)
    - TJ163.13-163.25 Power resources (2)
    - TJ163.26-163.5 Energy conservation (4)
    - TJ181-210 Mechanical movements (3)
    - TJ210.2-211.47 Mechanical devices and figures. Automata. Ingenious mechanisms. Robots (General) (14)
    - TJ212-225 Control engineering systems. Automatic machinery (General) (10)
    - TJ255-265 Heat engines (4)
    - TJ266-267.5 Turbines. Turbomachines (General) (1)
    - TJ807-830 Renewable energy sources (8)
    - TJ836-927 Hydraulic machinery (2)
  - TK Electrical engineering. Electronics Nuclear engineering (865)
    - TK1001-1841 Production of electric energy or power. Powerplants. Central stations (9)
    - TK2000-2891 Dynamoelectric machinery and auxiliaries (4)
    - TK2896-2985 Production of electricity by direct energy conversion (5)
    - TK3001-3521 Distribution or transmission of electric power (14)
    - TK301-399 Electric meters (1)
    - TK4125-4399 Electric lighting (1)
    - TK452-454.4 Electric apparatus and materials. Electric circuits. Electric networks (5)
    - TK4601-4661 Electric heating (1)
    - TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television (369)
    - TK7800-8360 Electronics (272)
      - TK7871 Electronics--Materials (44)
      - TK7885-7895 Computer engineering. Computer hardware (16)
        TK7895.M4 Memory systems (5)
      - TK8300-8360 Photoelectronic devices (General) (12)
    - TK9001-9401 Nuclear engineering. Atomic power (1)
    - TK9900-9971 Electricity for amateurs. Amateur constructors' manuals (1)
  - TL Motor vehicles. Aeronautics. Astronautics (19)
    - TL1-484 Motor vehicles. Cycles (9)
    - TL500-777 Aeronautics. Aeronautical engineering (4)
  - TN Mining engineering. Metallurgy (5)
    - TN600-799 Metallurgy (5)
  - TP Chemical technology (37)
    - TP1080-1185 Polymers and polymer manufacture (7)
    - TP155-156 Chemical engineering (3)
    - TP200-248 Chemicals: Manufacture, use, etc. (3)
    - TP315-360 Fuel (1)
    - TP670-699 Oils, fats, and waxes (2)
      - TP690-692.5 Petroleum refining. Petroleum products (1)
    - TP934-945 Paints, pigments, varnishes, etc. (1)
  - TR Photography (13)
    - TR624-835 Applied photography Including artistic, commercial, medical photography, photocopying processes (2)
    - TR845-899 Cinematography. Motion pictures (5)
  - TS Manufactures (36)
    - TS1300-1865 Textile industries (4)
    - TS155-194 Production management. Operations management (5)
    - TS200-770 Metal manufactures. Metalworking (4)
      - TS695 Chemical vapor deposition (1)
  - TT Handicrafts Arts and crafts (3)
    - TT205-267 Metalworking (1)
    - TT300-382.8 Painting. Wood finishing (1)
  - TX Home economics (21)
    - TX301-339 The house Including arrangement, care, servants (1)
    - TX341-641 Nutrition. Foods and food supply (1)
- U Military Science (1)
  - U Military Science (General) (1)
- Z Bibliography. Library Science. Information Resources (27)
  - Z004 Books. Writing. Paleography (6)
  - Z665 Library Science. Information Science (7)
  - Z719 Libraries (General) (2)
  - Z242 Book industries and trade (1)
  - ZA3038-5190 Information resources (General) (11)
    - ZA4050-4775 Information in specific formats or media (6)
      - ZA4050-4480 Electronic information resources (2)
      - ZA4450-4460 Databases (1)
      - ZA4550-4575 Motion pictures. Video recordings (3)