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LC Classification: T

A breakdown of the Library of Congress Classification system

T - Overview

T - Technology (General)

TA - Engineering (General). Civil engineering

TC - Hydraulic engineering. Ocean engineering

TD - Environmental technology. Sanitary engineering

TE - Highway engineering. Roads and pavements

TF - Railroad engineering and operation

TG - Bridge engineering

TH - Building construction

TJ - Mechanical engineering and machinery

TK - Electrical engineering. Electronics. Nuclear engineering

TL - Motor vehicles. Aeronautics. Astronautics

TN - Mining engineering. Metallurgy

TP - Chemical technology

TR - Photography

TS - Manufactures

TT - Handicrafts. Arts and crafts

TX - Home economics

For Further Details

For more detailed information, visit the Library of Congress Classification Outline.

T - Technology

T - Technology (General)

  • T55.4-60.8 Industrial engineering. Management engineering
  • T61-173 Technical education. Technical schools
  • T175-178 Industrial research. Research and development
  • T201-342 Patents. Trademarks
  • T351-385 Mechanical drawing. Engineering graphics
  • T391-995 Exhibitions. Trade shows. World's fairs

TA - Engineering (General). Civil engineering

  • TA164 Bioengineering
  • TA168 Systems engineering
  • TA349-359 Mechanics of engineering. Applied mechanics
  • TA401-492 Materials of engineering and construction. Mechanics of materials
  • TA501-625 Surveying
  • TA630-695 Structural engineering (General)
  • TA703-712 Engineering geology. Rock mechanics. Soil mechanics. Underground construction
  • TA715-787 Earthwork. Foundations
  • TA800-820 Tunneling. Tunnel
  • TA1001-1280 Transportation engineering
  • TA1501-1820 Applied optics. Photonics
  • TA2001-2040 Plasma engineering. Applied plasma dynamics

TC - Hydraulic engineering. Ocean engineering

  • TC1-978 Hydraulic engineering
    • TC203-380 Harbors and coast protective works. Coastal engineering. Lighthouses
    • TC401-506 River, lake, and water-supply engineering (General)
    • TC530-537 River protective works. Regulation. Flood control
    • TC540-558 Dams. Barrages
    • TC601-791 Canals and inland navigation. Waterways
    • TC801-978 Irrigation engineering. Reclamation of wasteland. Drainage
  • TC1501-1800 Ocean engineering

TD - Environmental technology. Sanitary engineering

  • TD159-186 Municipal engineering
  • TD172-193.5 Environmental pollution
  • TD201-500 Water supply for domestic and industrial purposes
  • TD511-780 Sewage collection and disposal systems. Sewerage
  • TD813-870 Street cleaning. Litter and its removal
  • TD895-899 Industrial and factory sanitation
  • TD1020-1066 Hazardous substances and their disposal

TE - Highway engineering. Roads and pavements

  • TE175-176.5 Highway design. Interchanges and intersections
  • TE200-205 Materials for roadmaking
  • TE210-228.3 Construction details
  • TE250-278.8 Pavements and paved roads
  • TE279.5-298 Pedestrian facilities

TF - Railroad engineering and operation

  • TF200-320 Railway construction
  • TF501-668 Railway operation and management
  • TF670-851 Local and light railways
  • TF855-1127 Electric railways
  • TF1300-1620 High speed ground transportation

TG - Bridge engineering

TH - Building construction

  • TH845-895 Architectural engineering. Structural engineering of buildings
  • TH1000-1725 Systems of building construction (Including fireproof construction, concrete construction)
  • TH2025-3000 Details in building design and construction (Including walls, roofs)
  • TH3301-3411 Maintenance and repair
  • TH5011-5701 Construction by phase of the work (Building trades)
  • TH6101-6887 Plumbing and pipefitting
  • TH7005-7699 Heating and ventilation. Air conditioning
  • TH7700-7975 Illumination. Lighting
  • TH8001-8581 Decoration and decorative furnishings
  • TH9025-9745 Protection of buildings

TJ - Mechanical engineering and machinery

  • TJ170-179 Mechanics applied to machinery. Dynamics
  • TJ181-210 Mechanical movements
  • TJ227-240 Machine design and drawing
  • TJ255-265 Heat engines
  • TJ268-740 Steam engineering
  • TJ751-805 Miscellaneous motors and engines (Including gas, gasoline, diesel engines)
  • TJ807-830 Renewable energy sources
  • TJ836-927 Hydraulic machinery
  • TJ950-1030 Pneumatic machinery
  • TJ1350-1418 Hoisting and conveying machinery
  • TJ1425-1575 Lifting and pressing machinery
  • TJ1501-1519 Sewing machines

TK - Electrical engineering. Electronics. Nuclear engineering

  • TK301-399 Electric meters
  • TK1001-1841 Production of electric energy or power. Powerplants. Central stations
  • TK2000-2891 Dynamoelectric machinery and auxiliaries (Including generators, motors, transformers)
  • TK3001-3521 Distribution or transmission of electric power
  • TK4125-4399 Electric lighting
  • TK5101-6720 Telecommunication (Including telegraphy, telephone, radio, radar, television)
  • TK7800-8360 Electronics
  • TK9001-9401 Nuclear engineering. Atomic power

TL - Motor vehicles. Aeronautics. Astronautics

  • TL1-484 Motor vehicles. Cycles
  • TL500-777 Aeronautics. Aeronautical engineering
  • TL780-785.8 Rocket propulsion. Rockets
  • TL787-4050 Astronautics. Space travel

TN - Mining engineering. Metallurgy

  • TN263-271 Mineral deposits. Metallic ore deposits. Prospecting
  • TN275-325 Practical mining operations. Safety measures
  • TN400-580 Ore deposits and mining of particular metals
  • TNN600-799 Metallurgy

TP - Chemical technology

  • TP155-156 Chemical engineering
  • TP200-248 Chemicals: Manufacture, use, etc.
  • TP267.5-301 Explosives and pyrotechnics
  • TP315-360 Fuel
  • TP368-456 Food processing and manufacture
  • TP500-660 Fermentation industries. Beverages. Alcohol
  • TP751-762 Gas industry
  • TP890-933 Textile bleaching, dyeing, printing, etc.

TR - Photography

  • TR250-265 Cameras
  • TR287-500 Photographic processing. Darkroom technique
  • TR510-545 Color photography
  • TR550-581 Studio and laboratory
  • TR624-835 Applied photography (Including artistic, commercial, medical photography, photocopying processes)
    TR845-899 Cinematography. Motion pictures

TS - Manufactures

  • TS155-194 Production management. Operations management
  • TS200-770 Metal manufactures. Metalworking
  • TS780-788 Stonework
  • TS800-937 Wood technology. Lumber
  • TS940-1047 Leather industries. Tanning
  • TS1080-1268 Paper manufacture and trade
  • TS1300-1865 Textile industries
  • TS2120-2159 Cereals and grain. Milling industry
  • TS2220-2283 Tobacco industry

TT - Handicrafts. Arts and crafts

  • TT174-176 Articles for children
  • TT180-200 Woodworking. Furniture making. Upholstery
  • TT205-267 Metalworking
  • TT300-382.8 Painting. Wood finishing
  • TT490-695 Clothing manufacture. Dressmaking. Tailoring
  • TT697-927 Home arts. Homecrafts (Including sewing, embroidery, decorative crafts)
  • TT950-979 Hairdressing. Beauty culture. Barber's work
  • TT980-999 Laundry work

TX - Home economics

  • TX301-339 The house (Including arrangement, care, servants)
  • TX341-641 Nutrition. Foods and food supply
  • TX642-840 Cooking
  • TX901-946.5 Hospitality industry. Hotels, clubs, restaurants, etc. Food service
  • TX950-953 Taverns, barrooms, saloons
  • TX955-985 Building operation and housekeeping