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Library of Congress Subject Areas (9547)
- A General Works (5)
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- B Philosophy. Psychology. Religion (132)
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- C Auxiliary Sciences of History (2)
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- H Social Sciences (965)
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- L Education (1239)
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- Q Science (1169)
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      - QA75.5 Electronic computers. Computer science (50)
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- R Medicine (141)
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- S Agriculture (35)
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- T Technology (5771)
  - T Technology (General) (384)
    - T201 Patents. Trademarks (1)
  - T55-55.3 Industrial safety. Industrial accident prevention (40)
  - T55.4-60.8 Industrial engineering. Management engineering (13)
  - T58.5-58.64 Information technology (43)
  - T58.6-58.62 Management information systems (34)
  - T59.5 Automation (5)
  - T59.7-59.77 Human engineering in industry. Man-machine systems (2)
  - T61-173 Technical education. Technical schools (51)
  - TA Engineering (General). Civil engineering (General) (1273)
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    - TA1001-1280 Transportation engineering (8)
    - TA1501-1820 Applied optics. Photonics (72)
    - TA164 Bioengineering (5)
    - TA165 Engineering instruments, meters, etc. Industrial instrumentation (3)
    - TA166-167 Human engineering (7)
    - TA169 Systems reliability, failure, Fault location, safety (1)
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    - TA213-215.1 Engineering machinery, tools, and implements (4)
    - TA329-348 Engineering mathematics. Engineering analysis (20)
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    - TA365-367 Acoustics in engineering. Acoustical engineering (25)
    - TA401-492 Materials of engineering and construction. Mechanics of materials (598)
    - TA495 Disasters and engineering (2)
    - TA501-625 Surveying (14)
    - TA630-695 Structural engineering (General) (149)
    - TA703-711 Engineering geology. Rock mechanics. Soil mechanics. (143)
    - TA715-787 Earthwork. Foundations (12)
    - TA800-820 Tunneling. Tunnels (2)
  - TC Hydraulic engineering. Ocean engineering (65)
  - TD Environmental technology. Sanitary engineering (490)
    - TD1-157 Environmental technology. Sanitary engineering (13)
    - TD1020-1066 Hazardous substances and their disposal (3)
    - TD1067-9999 Hazardous substances and their disposal (2)
    - TD169-171 Environmental protection. Environmental geotechnology (20)
    - TD172-193 Environmental pollution (22)
    - TD194-196 Environmental effects of industries and plants. Special environmental pollutants (14)
    - TD201-500 Water supply for domestic and industrial purposes (161)
    - TD511-780 Sewage collection and disposal systems. Sewerage (50)
    - TD785-812 Municipal refuse. Solid wastes (67)
    - TD878-880 Soil pollution. Soil remediation (18)
    - TD881-890 Air pollution and its control (45)
    - TD891-894 Noise and its control (36)
    - TD895-899 Industrial and factory sanitation (15)
    - TD920-931 Rural and farm sanitary engineering (4)
  - TE Highway engineering. Roads and pavements (70)
  - TF Railroad engineering and operation (29)
  - TG Bridge engineering (3)
  - TH Building construction (362)
    - TH1-844 Building construction (130)
    - TH1000-1727 Systems of building construction (36)
    - TH2025 Details in building design and construction (15)
    - TH3301-3411 Maintenance and repair (33)
    - TH5011-5701 Construction by phase of the work (Building trades) (1)
    - TH6010-6013 Building fittings and their installation (1)
    - TH6014-6085 Environmental engineering of buildings. Sanitary engineering of buildings (5)
    - TH7005-7699 Heating and ventilation. Air conditioning (60)
    - TH7700-7975 Illumination. Lighting (4)
    - TH845-895 Architectural engineering. Structural engineering of buildings (34)
    - TH9025-9092 Protection of buildings (5)
    - TH9111-9599 Protection from fire. Fire prevention and extinction (1)
    - TH9701-9745 Protection from burglary, sabotage, etc. Security in buildings (5)
  - TJ Mechanical engineering and machinery (719)
    - TJ1-162 Mechanical engineering and machinery (63)
    - TJ1040-1119 Machinery exclusive of prime movers (27)
    - TJ1125-1345 Machine shops and machine shop practice (83)
    - TJ1350-1418 Hoisting and conveying machinery (1)
    - TJ1530-1570 Other special machinery (2)
    - TJ163-163.12 Mechanical and electrical engineering combined (13)
    - TJ164 Power plants (General) (1)
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    - TJ166 Safety measures and devices (3)
    - TJ170-179 Mechanics applied to machinery. Dynamics (18)
    - TJ181-210.1 Mechanical movements (13)
    - TJ210.2-211 Mechanical devices and figures. Automata. Ingenious mechanisms. (92)
    - TJ212-225 Control engineering systems. Automatic machinery (General) (81)
    - TJ227-240 Machine design and drawing (3)
    - TJ241-254.4 Machine construction (General) (10)
    - TJ255-265 Heat engines (58)
    - TJ266-267 Turbines. Turbomachines (General) (8)
    - TJ268-740 Steam engineering (2)
    - TJ751-805 Miscellaneous motors and engines (56)
    - TJ807-830 Renewable energy sources (40)
    - TJ836-935 Hydraulic machinery (29)
    - TJ950-1030 Pneumatic machinery (3)
  - TK Electrical engineering. Electronics Nuclear engineering (1382)
    - TK1-300 Electrical engineering. Electronics. Nuclear engineering (32)
    - TK1001-1841 Production of electric energy or power. Powerplants. Central stations (168)
    - TK2000-2891 Dynamoelectric machinery and auxiliaries (143)
    - TK2896-2986 Production of electricity by direct energy conversion (30)
    - TK3001-3521 Distribution or transmission of electric power (113)
    - TK301-399 Electric meters. Telemeter systems (1)
    - TK4001-4102 Applications of electric power (9)
    - TK411-415 Electrical engineering and testing laboratories (4)
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    - TK435 Estimates (1)
    - TK441-448 Management and superintendence of electrical enterprises (1)
    - TK452-454 Electric apparatus and materials. Electric circuits. Electric networks (10)
    - TK4601-4661 Electric heating (7)
    - TK5101-5865 Telecommunication. Telegraph. (240)
    - TK6540-6571 Radio (57)
    - TK6573-6595 Radar (19)
    - TK6600 Phototelegraphy. Picture telegraphy (4)
    - TK6630-6687 Television. Digital video (7)
    - TK7018-7725 Installation of household appliances (2)
    - TK7800-8360 Electronics (439)
    - TK9001-9401 Nuclear engineering. Atomic power (1)
  - TL Motor vehicles. Aeronautics. Astronautics (136)
    - TL1-484 Motor vehicles. Cycles (75)
    - TL500-778 Aeronautics. Aeronautical engineering (33)
    - TL787-4050 Astronautics. Space travel (1)
  - TN Mining engineering. Metallurgy (35)
  - TP Chemical technology (385)
    - TP1-154 Chemical technology (9)
    - TP1080-1185 Polymers and polymer manufacture (84)
    - TP155-156 Chemical engineering (30)
    - TP157-159 Apparatus and supplies (20)
    - TP250-261 Industrial electrochemistry (27)
    - TP265-267.4 Chemistry of fire and fire prevention (1)
    - TP315-360 Fuel (84)
    - TP363 Heating, drying, cooling, evaporating (8)
    - TP368-456 Food processing and manufacture (17)
    - TP489-498 Low temperature engineering. Cryogenic engineering. Refrigeration. Ice cutting and storage (4)
    - TP670-699 Oils, fats, and waxes (5)
    - TP751-762 Gas industry (5)
    - TP785-869 Clay industries. Ceramics. Glass (27)
    - TP875-888 Cement industries (1)
    - TP890-933 Textile bleaching, dyeing, printing, etc. (2)
    - TP934-945 Paints, pigments, varnishes, etc. (3)
    - TP950-994 Miscellaneous organic chemical industries (3)
    - TP995-996 Utilization of wastes (17)
  - TR Photography (5)
  - TS Manufactures (329)
    - TS1-154 Manufactures (21)
    - TS1080-1268 Paper manufacture and trade (17)
    - TS1300-1865 Textile industries (9)
    - TS155-194 Production management. Operations management (167)
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    - TS200-770 Metal manufactures. Metalworking (83)
    - TS800-937 Wood technology. Lumber (4)
  - TT Handicrafts Arts and crafts (3)
  - TX Home economics (11)
- U Military Science (2)
  - U Military Science (General) (2)
- V Naval Science (3)
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- Z Bibliography. Library Science. Information Resources (34)
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  - ZA Information resources (10)
    - ZA4050 Electronic information resources (6)
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