T1-995--Technology (General)
T10.5-11.9--Communication of technical information
T11.95-12.5--Industrial directories
T55-55.3--Industrial safety. Industrial accident prevention
T55.4-60.8--Industrial engineering. Management engineering
T57-57.97--Applied mathematics. Quantitative methods
T57.6-57.97--Operations research. Systems analysis
T58.4--Managerial control systems
T58.5-58.64--Information technology
T58.6-58.62--Management information systems
T58.7-58.8--Production capacity. Manufacturing capacity
T59-59.2--Standardization
T59.5--Automation
T59.7-59.77--Human engineering in industry. Man-machine systems
T60-60.8--Work measurement. Methods engineering
T61-173--Technical education. Technical schools
T173.2-174.5--Technological change
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
TA1-2040--Engineering (General). Civil engineering (General)
TA164--Bioengineering
TA165--Engineering instruments, meters, etc. Industrial instrumentation
TA166-167--Human engineering
TA168--Systems engineering
TA170-171--Environmental engineering
TA174--Engineering design
TA177.4-185--Engineering economy
TA190-194--Management of engineering works
TA197-198--Engineering meteorology
TA213-215--Engineering machinery, tools, and implements
TA329-348--Engineering mathematics. Engineering analysis
TA349-359--Mechanics of engineering. Applied mechanics
TA365-367--Acoustics in engineering. Acoustical engineering
TA401-492--Materials of engineering and construction. Mechanics of materials
TA495--Disasters and engineering
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. Tunnels
TA1001-1280--Transportation engineering
TA1501-1820--Applied optics. Photonics
TA2001-2040--Plasma engineering. Applied plasma dynamics
TC1-978--Hydraulic engineering
TC160-181--Technical hydraulics
TC183-201--General preliminary operations. Dredging. Submarine building
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
TD1-1066--Environmental technology. Sanitary engineering
TD159-168--Municipal engineering
TD169-171.8--Environmental protection
TD172-193.5--Environmental pollution
TD194-195--Environmental effects of industries and plants
TD201-500--Water supply for domestic and industrial purposes
TD419-428--Water pollution
TD429.5-480.7-- --Water purification. Water treatment and conditioning. Saline water conversion
TD481-493--Water distribution systems
TD511-780--Sewage collection and disposal systems. Sewerage
TD783-812.5--Municipal refuse. Solid wastes
TD813-870--Street cleaning. Litter and its removal
TD878-894--Special types of environment
Including soil pollution, air pollution, noise pollution
TD895-899--Industrial and factory sanitation
TD896-899--Industrial and factory wastes
TD920-934--Rural and farm sanitary engineering
TD940-949--Low temperature sanitary engineering
TD1020-1066--Hazardous substances and their disposal
TE1-450--Highway engineering. Roads and pavements
TE175-176.5--Highway design. Interchanges and intersections
TE177-178.8--Roadside development. Landscaping
TE200-205--Materials for roadmaking
TE206-209.5--Location engineering
TE210-228.3--Construction details
Including foundations, maintenance, equipment
TE250-278.8--Pavements and paved roads
TE279--Streets
TE279.5-298--Pedestrian facilities
TE280-295--Sidewalks. Footpaths. Flagging
TE298--Curbs. Curbstones
TF1-1620--Railroad engineering and operation
TF200-320--Railway construction
TF340-499--Railway equipment and supplies
TF501-668--Railway operation and management
TF670-851--Local and light railways
TF840-851--Elevated railways and subways
TF855-1127--Electric railways
TF1300-1620--High speed ground transporation
TG1-470--Bridge engineering
TH1-9745--Building construction
TH845-895--Architectural engineering. Structural engineering of buildings
TH900-915--Construction equipment in building
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
TH4021-4977--Buildings: Construction with reference to use
Including public buildings, dwellings
TH5011-5701--Construction by phase of the work (Building trades)
TH6014-6081--Environmental engineering of buildings. Sanitary engineering of buildings
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
Including protection from dampness, fire, burglary
TJ1-1570--Mechanical engineering and machinery
TJ163.13-163.25--Power resources
TJ163.26-163.5--Energy conservation
TJ170-179--Mechanics applied to machinery. Dynamics
TJ181-210--Mechanical movements
TJ210.2-211.47--Mechanical devices and figures. Automata. Ingenious mechanisms. Robots (General)
TJ212-225--Control engineering systems. Automatic machinery (General)
TJ227-240--Machine design and drawing
TJ241-254.7--Machine construction (General)
TJ255-265--Heat engines
TJ266-267.5--Turbines. Turbomachines (General)
TJ268-740--Steam engineering
TJ603-695--Locomotives
TJ751-805--Miscellaneous motors and engines
Including gas, gasoline, diesel engines
TJ807-830--Renewable energy sources
TJ836-927--Hydraulic machinery
TJ940-940.5--Vacuum technology
TJ950-1030--Pneumatic machinery
TJ1040-1119--Machinery exclusive of prime movers
TJ1125-1345--Machine shops and machine shop practice
TJ1350-1418--Hoisting and conveying machinery
TJ1425-1475--Lifting and pressing machinery
TJ1480-1496--Agricultural machinery. Farm machinery
TJ1501-1519--Sewing machines
TK1-9971--Electrical engineering. Electronics. Nuclear engineering
TK301-399--Electric meters
TK452-454.4--Electric apparatus and materials. Electric circuits. Electric networks
TK1001-1841--Production of electric energy or power. Powerplants. Central stations
TK2000-2891--Dynamoelectric machinery and auxiliaries
Including generators, motors, transformers
TK2896-2985--Production of electricity by direct energy conversion
TK3001-3521--Distribution or transmission of electric power
TK4001-4102--Applications of electric power
TK4125-4399--Electric lighting
TK4601-4661--Electric heating
TK5101-6720--Telecommunication
Including telegraphy, telephone, radio, radar, television
TK7800-8360--Electronics
TK7885-7895--Computer engineering. Computer hardware
TK8300-8360--Photoelectronic devices (General)
TK9001-9401--Nuclear engineering. Atomic power
TK9900-9971--Electricity for amateurs. Amateur constructors' manuals
TL1-4050--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
TN1-997--Mining engineering. Metallurgy
TN263-271--Mineral deposits. Metallic ore deposits. Prospecting
TN275-325--Practical mining operations. Safety measures
TN331-347--Mine transportation, haulage and hoisting. Mining machinery
TN400-580--Ore deposits and mining of particular metals
TN600-799--Metallurgy
TN799.5-948--Nonmetallic minerals
TN950-997--Building and ornamental stones
TP1-1185--Chemical technology
TP155-156--Chemical engineering
TP200-248--Chemicals: Manufacture, use, etc.
TP248.13-248.65--Biotechnology
TP250-261--Industrial electrochemistry
TP267.5-301--Explosives and pyrotechnics
TP315-360--Fuel
TP368-456--Food processing and manufacture
TP480-498--Low temperature engineering. Cryogenic engineering. Refrigeration
TP500-660--Fermentation industries. Beverages. Alcohol
TP670-699--Oils, fats, and waxes
TP690-692.5--Petroleum refining. Petroleum products
TP700-746--Illuminating industries (Nonelectric)
TP751-762--Gas industry
TP785-869--Clay industries. Ceramics. Glass
TP875-888--Cement industries
TP890-933--Textile bleaching, dyeing, printing, etc.
TP934-945--Paints, pigments, varnishes, etc.
TP1080-1185--Polymers and polymer manufacture
TR1-1050--Photography
TR250-265--Cameras
TR287-500--Photographic processing. Darkroom technique
TR504-508--Transparencies. Diapositives
TR510-545--Color photography
TR550-581--Studio and laboratory
TR590-620--Lighting
TR624-835--Applied photography
Including artistic, commercial, medical photography, photocopying processes
TR845-899--Cinematography. Motion pictures
TR925-1050--Photomechanical processes
TS1-2301--Manufactures
TS155-194--Production management. Operations management
TS195-198.8--Packaging
TS200-770--Metal manufactures. Metalworking
TS780-788--Stonework
TS800-937--Wood technology. Lumber
TS840-915--Wood products. Furniture
TS920-937--Chemical processing of wood
TS940-1047--Leather industries. Tanning
TS1060-1070--Furs
TS1080-1268--Paper manufacture and trade
TS1300-1865--Textile industries
TS1870-1935--Rubber industry
TS1950-1982--Animal products
TS2120-2159--Cereals and grain. Milling industry
TS2220-2283--Tobacco industry
TS2284-2288--Animal feeds and feed mills. Pet food industry
TT1-999--Handicrafts. Arts and crafts
TT161-170.7--Manual training. School shops
TT174-176--Articles for children
TT180-200--Woodworking. Furniture making. Upholstering
TT201-203--Lathework. Turning
TT205-267--Metalworking
TT300-382.8--Painting. Wood finishing
TT387-410--Soft home furnishings
TT490-695--Clothing manufacture. Dressmaking. Tailoring
TT697-927--Home arts. Homecrafts
Including sewing, embroidery, decorative crafts
TT950-979--Hairdressing. Beauty culture. Barbers' work
TT980-999--Laundry work
TX1-1110--Home economics
TX301-339--The house
Including arrangement, care, servants
TX341-641--Nutrition. Foods and food supply
TX642-840--Cooking
TX851-885--Dining-room service
TX901-946.5--Hospitality industry. Hotels, clubs, restaurants, etc. Food service
TX950-953--Taverns, barrooms, saloons
TX955-985--Building operation and housekeeping
TX1100-1105--Mobile home living
TX1110--Recreational vehicle living