Class T: Technology is a classification used by the Library of Congress Classification system. This page outlines the subclasses of Class T. ^{[1] [2]}

10.5-11.9...................................Communication of technical information

11.95-12.5.................................Industrial directories

55-55.3............................................Industrial safety. Industrial accident prevention

55.4-60.8...................................Industrial engineering. Management engineering

57-57.97..........................................Applied mathematics. Quantitative methods

57.6-57.97.............................................Operations research. Systems analysis

58.4................................................Managerial control systems

58.5-58.64.......................................Information technology

58.6-58.62.......................................Management information systems

58.7-58.8.........................................Production capacity. Manufacturing capacity

59-59.2............................................Standardization

59.5................................................Automation

59.7-59.77.......................................Human engineering in industry. Man-machine systems

60-60.8............................................Work measurement. Methods engineering

61-173.......................................Technical Education. Technical schools

173.2-174.5...............................Technological change

175-178.....................................Industrial research. Research and development

201-342.....................................Patents. Trademarks

351-385.....................................Mechanical drawing. Engineering graphics

391-995.....................................Exhibitions. Trade shows. World Fairs.

164..........................................Bioengineering

165..........................................Engineering instruments, meters, etc. Industrial instrumentation

166-167...................................Human engineering

168..........................................Systems engineering

170-171...................................Environmental engineering

174..........................................Engineering design

177.4-185................................Engineering economy

190-194...................................Management of engineering works

197-198...................................Engineering meteorology

213-215...................................Engineering machinery, tools, and implements

329-348...................................Engineering mathematics. Engineering analysis

349-359...................................Mechanics of engineering. Applied mechanics

365-367...................................Acoustics in engineering. Acoustical engineering

401-492...................................Materials of engineering and construction. Mechanics of materials

495..........................................Disasters and engineering

501-625...................................Surveying

630-695...................................Structural engineering (General)

703-712...................................Engineering geology. Rock mechanics. Soil mechanics. Underground construction

715-787...................................Earthwork. Foundations

800-820...................................Tunneling. Tunnels

1001-1280...............................Transportation engineering

1501-1820...............................Applied optics. Photonics

2001-2040...............................Plasma engineering. Applied plasma dynamics

1-978.................................Hydraulic engineering

160-181...................................Technical hydraulics

183-201...................................General preliminary operations. Dredging. Submarine building

203-380...................................Harbors and coast protective works. Coastal engineering. Lighthouses

401-506...................................River, lake, and water-supply engineering (General)

530-537...................................River protective works. Regulation. Flood control

540-558...................................Dams. Barrages

601-791...................................Canals and inland navigation. Waterways

801-978...................................Irrigation engineering. Reclamation of wasteland. Drainage

1501-1800.........................Ocean engineering

159-168...................................Municipal engineering

169-171.8................................Environmental protection

172-193.5................................Environmental pollution

194-195...................................Environmental effects of industries and plants

201-500...................................Water supply for domestic and industrial purposes

419-428.........................................Water pollution

429.5-480.7..................................Water purification. Water treatment and conditioning. Saline water conversion

481-493.........................................Water distribution systems

511-780...................................Sewage collection and disposal systems. Sewerage

783-812.5................................Municipal refuse. Solid wastes

813-870...................................Street cleaning. Litter and its removal

878-894...................................Special types of environment. Including soil pollution, air pollution, noise pollution

895-899...................................Industrial and factory sanitation

896-899.........................................Industrial and factory wastes

920-934...................................Rural and farm sanitary engineering

940-949...................................Low temperature sanitary engineering

1020-1066...............................Hazardous substances and their disposal

175-176.5................................Highway design. Interchanges and intersections

177-178.8................................Roadside development. Landscaping

200-205...................................Materials for roadmaking

206-209.5................................Location engineering

210-228.3................................Construction details. Including foundations, maintenance, equipment

250-278.8................................Pavements and paved roads

279..........................................Streets

279.5-298................................Pedestrian facilities

280-295.........................................Sidewalks. Footpaths. Flagging

298................................................Curbs. Curbstones

200-320...................................Railway construction

340-499...................................Railway equipment and supplies

501-668...................................Railway operation and management

670-851...................................Local and light railways

840-851.........................................Elevated railways and subways

855-1127.................................Electric railways

1300-1620................................High speed ground transportation

1-470................................Bridge engineering

845-895...................................Architectural engineering. Structural engineering of buildings

900-915...................................Construction equipment in building

1000-1725...............................Systems of building construction. Including fireproof construction, concrete construction

2025-3000...............................Details in building design and construction. Including walls, roofs

3301-3411...............................Maintenance and repair

4021-4977...............................Buildings: Construction with reference to use. Including public buildings, dwellings

5011-5701...............................Construction by phase of the work (Building trades)

6014-6081...............................Environmental engineering of buildings. Sanitary engineering of buildings

6101-6887...............................Plumbing and pipefitting

7005-7699...............................Heating and ventilation. Air conditioning

7700-7975...............................Illumination. Lighting

8001-8581...............................Decoration and decorative furnishings

9025-9745...............................Protection of buildings. Including protection from dampness, fire, burglary

163.13-163.25..........................Power resources

163.26-163.5............................Energy conservation

170-179...................................Mechanics applied to machinery. Dynamics

181-210...................................Mechanical movements

210.2-211.47............................Mechanical devices and figures. Automata. Ingenious mechanisms. Robots (General)

212-225...................................Control engineering systems. Automatic machinery (General)

227-240...................................Machine design and drawing

241-254.7................................Machine construction (General)

255-265...................................Heat engines

266-267.5................................Turbines. Turbomachines (General)

268-740...................................Steam engineering

603-695.........................................Locomotives

751-805...................................Miscellaneous motors and engines. Including gas, gasoline, diesel engines

807-830...................................Renewable energy sources

836-927...................................Hydraulic machinery

940-940.5................................Vacuum technology

950-1030..................................Pneumatic machinery

1040-1119................................Machinery exclusive of prime movers

1125-1345................................Machine shops and machine shop practice

1350-1418................................Hoisting and conveying machinery

1425-1475................................Lifting and pressing machinery

1480-1496................................Agricultural machinery. Farm machinery

1501-1519................................Sewing machines

301-399...................................Electric meters

452-454.4................................Electric apparatus and materials. Electric circuits. Electric networks

1001-1841...............................Production of electric energy or power. Powerplants. Central stations

2000-2891...............................Dynamoelectric machinery and auxiliaries. Including generators, motors, transformers

2896-2985...............................Production of electricity by direct energy conversion

3001-3521...............................Distribution or transmission of electric power

4001-4102...............................Applications of electric power

4125-4399...............................Electric lighting

4601-4661...............................Electric heating

5101-6720...............................Telecommunication. Including telegraphy, telephone, radio, radar, television

7800-8360...............................Electronics

7885-7895.....................................Computer engineering. Computer hardware

8300-8360.....................................Photoelectronic devices (General)

9001-9401...............................Nuclear engineering. Atomic power

9900-9971...............................Electricity for amateurs. Amateur constructors' manuals

1-484.......................................Motor vehicles. Cycles

500-777...................................Aeronautics. Aeronautical engineering

780-785.8................................Rocket propulsion. Rockets

787-4050.................................Astronautics. Space travel

263-271...................................Mineral deposits. Metallic ore deposits. Prospecting

275-325...................................Practical mining operations. Safety measures

331-347...................................Mine transportation, haulage and hoisting. Mining machinery

400-580...................................Ore deposits and mining of particular metals

600-799...................................Metallurgy

799.5-948................................Nonmetallic minerals

950-997...................................Building and ornamental stones

155-156...................................Chemical engineering

200-248...................................Chemicals: Manufacture, use, etc.

248.13-248.65.........................Biotechnology

250-261...................................Industrial electrochemistry

267.5-301................................Explosives and pyrotechnics

315-360...................................Fuel

368-456...................................Food processing and manufacture

480-498...................................Low temperature engineering. Cryogenic engineering. Refrigeration

500-660...................................Fermentation industries. Beverages. Alcohol

670-699...................................Oils, fats, and waxes

690-692.5......................................Petroleum refining. Petroleum products

700-746...................................Illuminating industries (Nonelectric)

751-762...................................Gas industry

785-869...................................Clay industries. Ceramics. Glass

875-888...................................Cement industries

890-933...................................Textile bleaching, dyeing, printing, etc.

934-945...................................Paints, pigments, varnishes, etc.

1080-1185...............................Polymers and polymer manufacture

250-265...................................Cameras

287-500...................................Photographic processing. Darkroom technique

504-508...................................Transparencies. Diapositives

510-545...................................Color photography

550-581...................................Studio and laboratory

590-620...................................Lighting

624-835...................................Applied photography. Including artistic, commercial, medical photography, photocopying processes

845-899...................................Cinematography. Motion pictures

925-1050.................................Photomechanical processes

155-194...................................Production management. Operations management

195-198.8................................Packaging

200-770...................................Metal manufactures. Metalworking

780-788...................................Stonework

800-937...................................Wood technology. Lumber

840-915.........................................Wood products. Furniture

920-937.........................................Chemical processing of wood

940-1047..................................Leather industries. Tanning

1060-1070................................Furs

1080-1268................................Paper manufacture and trade

1300-1865................................Textile industries

1870-1935................................Rubber industry

1950-1982................................Animal products

2120-2159................................Cereals and grain. Milling industry

2220-2283................................Tobacco industry

2284-2288................................Animal feeds and feed mills. Pet food industry

161-170.7................................Manual training. School shops

174-176...................................Articles for children

180-200...................................Woodworking. Furniture making. Upholstering

201-203...................................Lathework. Turning

205-267...................................Metalworking

300-382.8................................Painting. Wood finishing

387-410...................................Soft home furnishings

490-695...................................Clothing manufacture. Dressmaking. Tailoring

697-927...................................Home arts. Homecrafts. Including sewing, embroidery, decorative crafts

950-979...................................Hairdressing. Beauty culture. Barbers' work

980-999...................................Laundry work

301-339...................................The house. Including arrangement, care, servants

341-641...................................Nutrition. Foods and food supply

642-840...................................Cooking

851-885...................................Dining-room service

901-946.5................................Hospitality industry. Hotels, clubs, restaurants, etc. Food service

950-953...................................Taverns, barrooms, saloons

955-985...................................Building operation and housekeeping

1100-1105...............................Mobile home living

1110........................................Recreational vehicle living