Wikipedia:Vital articles/Level 5/Technology

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Technology: General Agriculture, biotechnology and medical technology Computing, electronics and communication technology Optical, navigation, timekeeping, astronomical and space technology Transportation Weapons and other military technology

Random level 5 vital article in Technology

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Quota 1,000 articles.

Total 1,026 articles.

Class	#Articles
FA	5
GA	17
B	176
C	544
FFA	7
DGA	14
Start	277
Stub	7

Technology

This section contains 1026 articles.

Technology: General

This section contains 86 articles.

1. Technology (Level 1)
2. Applied science
3. Appropriate technology
4. Emerging technologies
5. Innovation
6. Invention (Level 4)
7. Maintenance
8. Miniaturization
9. Problem solving
   1. Heuristic
10. Research and development
11. Scientific instrument
12. Simulation
13. Technological convergence
14. Technological determinism
15. Technology adoption life cycle
16. Technology and society
17. Technology assessment
18. Technology life cycle
19. Technology transfer

Creativity, Vocational education, Intellectual property and Patent are listed in the Society and Social Sciences section; Industrial design in the Arts section.
For history of technology, see History#History of science and technology section.

Engineering

This section contains 66 articles.

1. Engineering (Level 2)
2. Nanotechnology (Level 4)
   1. Molecular machine
3. Nuclear technology (Level 4)
4. Technical drawing (Level 4)
5. Engineering ethics
6. Risk management
7. Engineering management
8. Engineering design process
   1. Requirements analysis
   2. Feasibility study
9. Computer-aided design
10. Engineering economics
11. Reverse engineering

Disciplines

This section contains 52 articles.

1. Agricultural engineering
2. Applied mechanics
3. Biological engineering
   1. Biochemical engineering
   2. Biomedical engineering (Level 4)
   3. Pharmaceutical engineering
4. Ceramic engineering
5. Chemical engineering (Level 4)
   1. Chemical reaction engineering
   2. Nuclear engineering
   3. Molecular engineering
   4. Petroleum engineering
   5. Process engineering
   6. Polymer engineering
   7. Green chemistry
6. Civil engineering (Level 3)
   1. Architectural engineering (Level 4)
   2. Construction engineering
      1. Demolition
   3. Earthquake engineering
   4. Environmental engineering
   5. Geotechnical engineering
      1. Directional drilling
   6. Hydraulic engineering
   7. Mining engineering
   8. Structural engineering
   9. Transportation engineering
   10. Highway engineering
7. Electrical engineering (Level 4)
   1. Computer engineering
8. Energy engineering
   1. Power engineering
   2. Telecommunications engineering
   3. Electronics engineering
   4. Control engineering
   5. Radio-frequency engineering
9. Engineering physics
10. Industrial engineering (Level 4)
    1. Computer-aided engineering
    2. Manufacturing engineering
11. Mechanical engineering (Level 3)
    1. Aerospace engineering (Level 4)
    2. Mechatronics
    3. Railway engineering
    4. Marine engineering
    5. Automotive engineering
12. Military engineering (Level 4)
13. Sanitary engineering
14. Security engineering
15. Software engineering (Level 4)
16. Structural analysis
17. Systems engineering

Energy

This section contains 189 articles.

Energy: General

This section contains 6 articles.

1. Energy development
   1. Electrification
2. Geothermal energy
3. Propellant
4. Renewable energy (Level 3)
5. Sustainable energy

Fuel

This section contains 27 articles.

1. Fuel (Level 4)
2. Biofuel (Level 4)
   1. Biomass (energy)
   2. Charcoal (Level 4)
   3. Firewood
3. Fossil fuel (Level 3)
   1. Coal (Level 3)
   2. Coke (fuel)
   3. Fracking
   4. Natural gas (Level 3)
      1. Liquefied natural gas
      2. Liquefied petroleum gas
   5. Oil well (Level 4)
      1. Oil platform
   6. Petroleum (Level 3)
      1. Petroleum reservoir
4. Hydrogen economy
5. Nuclear fuel
   1. Nuclear fuel cycle
6. Oil refinery (Level 4)
   1. Aviation fuel
      1. Jet fuel
   2. Diesel fuel
   3. Fuel oil
   4. Gasoline (Level 4)
   5. Kerosene (Level 4)
   6. Liquid fuel

Heating and cooling

This section contains 18 articles.

1. Heating, ventilation, and air conditioning (Level 4)
   1. Chimney (Level 4)
   2. Fireplace (Level 4)
   3. Heat pump
   4. Thermostat
2. Air conditioning (Level 4)
   1. Evaporative cooler
   2. Passive cooling
   3. Windcatcher
3. Boiler
4. Central heating (Level 4)
5. Fan (machine)
   1. Ceiling fan
6. Heat exchanger
   1. Radiator
7. Refrigeration (Level 3)
   1. Refrigerant
   2. Yakhchāl

Lighting

This section contains 12 articles.

1. Electric light (Level 3)
   1. Flashlight
   2. Fluorescent lamp
   3. Incandescent light bulb (Level 4)
   4. Neon lighting
2. Gas lighting
   1. Gas mantle
3. Lantern
   1. Jack-o'-lantern
4. Oil lamp
5. Prism lighting
   1. Light tube

Fire

This section contains 7 articles.

1. Blowtorch
2. Bonfire
3. Candle (Level 4)
4. Campfire
5. Lighter
6. Match
7. Torch

Power generation

This section contains 43 articles.

1. Power station (Level 4)
   1. Electric generator (Level 4)
      1. Induction generator
   2. Electricity generation (Level 4)
2. Hydropower (Level 3)
   1. Hydroelectricity (Level 4)
   2. Tidal power
   3. Watermill (Level 4)
3. Microgeneration
   1. Micro-CHP
4. Solar energy (Level 3)
   1. Solar power (Level 4)
   2. Solar cell (Level 4)
      1. Solar panel
5. Thermal power station
   1. Boiler (power generation)
   2. Cogeneration
   3. Combined-cycle power plant
   4. Concentrated solar power
   5. Cooling tower (Level 4)
   6. Fossil fuel power station
      1. Coal-fired power station
      2. Gas-fired power plant
   7. Geothermal power (Level 4)
6. Turbine (Level 4)
   1. Gas-turbine engine (Level 4)
   2. Steam turbine (Level 4)
   3. Wind turbine (Level 4)
7. Water wheel
8. Wind power (Level 3)
   1. Windmill (Level 4)

Nuclear power

This section contains 12 articles.

1. Nuclear power (Level 3)
2. Fusion power
   1. Inertial confinement fusion
   2. Tokamak
3. Nuclear power plant
4. Nuclear reactor
   1. Breeder reactor
   2. Molten-salt reactor
   3. Heavy water reactor
   4. Small modular reactor
   5. Nuclear marine propulsion
   6. Nuclear meltdown

Energy storage

This section contains 15 articles.

1. Energy storage
   1. Compressed-air energy storage
   2. Grid energy storage
   3. Home energy storage
   4. Thermal energy storage
2. Electric battery (Level 3)
   1. Alkaline battery
   2. Atomic battery
   3. Lead–acid battery
   4. Lithium-ion battery
   5. Lithium polymer battery
   6. Rechargeable battery
3. Fuel cell
4. Power-to-X
5. Pumped-storage hydroelectricity

Power transmission

This section contains 60 articles. See also: Electromagnetism and Electromagnetism

1. AC power plugs and sockets
2. Electric power transmission (Level 4)
3. Electric power distribution (Level 4)
4. Electrical grid (Level 4)
   1. Three-phase electric power
   2. Virtual power plant
5. Electrical wiring (Level 4)
   1. Electrical cable (Level 4)
      1. Power cable
6. Mains electricity

Concepts

This section contains 21 articles.

1. Availability factor
2. Automatic generation control
3. Backfeeding
4. Base load
5. Capacity factor
6. Demand factor
7. Droop speed control
8. Energy demand management
9. Energy return on investment
10. Electrical fault
11. Grid code
12. Load factor (electrical)
13. Load-following power plant
14. Merit order
15. Nameplate capacity
16. Peak demand
17. Electric power quality
18. Power-flow study
19. Repowering
20. Utility frequency
21. Variable renewable energy

Electricity transmission and distribution

This section contains 19 articles.

1. Demand response
2. Distributed generation
3. Distribution board
4. Dynamic demand (electric power)
5. Electric power system
6. Interconnector
7. High-voltage direct current
8. Load management
   1. Electricity market
9. Overhead power line
10. Smart grid
11. Substation
12. Super grid
13. Transmission system operator
14. Transmission tower
15. Underground power line
16. Utility pole
    1. Overhead cable
17. Wide area synchronous grid

Electrical protective devices

This section contains 10 articles.

1. Arc-fault circuit interrupter
2. Circuit breaker (Level 4)
3. Earth-leakage circuit breaker
4. Fuse (electrical) (Level 4)
5. Lightning rod
6. Residual-current device
7. Power system protection
8. Protective relay
9. Numerical relay
10. Sulfur hexafluoride circuit breaker

Specific energy structure

This section contains 1 article. See "Dams" section in "Specific infrastructure" for hydroelectric power plants

1. Continental Europe Synchronous Area

Industry

This section contains 227 articles. See also: "Industry" in Business and economics (Level 4)

Industry: General

This section contains 18 articles.

1. Factory (Level 4)
   1. Assembly line (Level 4)
   2. Automation (Level 4)
   3. Conveyor system
      1. Conveyor belt
   4. Industrial robot (Level 4)
   5. Interchangeable parts (Level 4)
   6. Mass production (Level 4)
   7. Mechanization (Level 4)
2. Pelletizing
3. Standardization (Level 4)
4. Waste (Level 3)
   1. Disposable product
   2. Incineration
   3. Landfill (Level 4)
   4. Recycling (Level 4)
   5. Waste management (Level 4)
5. 3D printing

Food, water and health

This section contains 37 articles.

1. Air purifier
   1. Air filter
      1. HEPA
   2. Catalytic converter
   3. Respirator
      1. Gas mask
   4. Scrubber
2. Bleach (Level 4)
3. Desalination (Level 4)
4. Detergent (Level 4)
5. Laundry (Level 4)
6. Food additive
   1. Food coloring
   2. High-fructose corn syrup
   3. Sugar substitute
7. Food processing
   1. Fermentation in food processing
   2. Pasteurization (Level 4)
8. Food storage
9. Oxygen mask
10. Soap (Level 4)
11. Sterilization (microbiology)

Sanitation

This section contains 8 articles.

1. Sanitation (Level 3)
2. Sewage
3. Sewerage
   1. Sanitary sewer (Level 4)
   2. Street gutter
4. Sewage treatment (Level 4)
   1. Septic tank
5. Water purification (Level 4)

Water supply

This section contains 7 articles.

1. water supply
2. Water supply network (Level 4)
3. Aqueduct (water supply) (Level 4)
4. Pumping station (Level 4)
5. Qanat (Level 4)
6. Water tower (Level 4)
7. Well (Level 4)

Materials

This section contains 45 articles.

1. Abrasive (Level 4)
2. Ceramic (Level 4)
   1. Pottery (Level 3)
      1. Earthenware
      2. Ironstone china
      3. Porcelain (Level 4)
      4. Stoneware
      5. Terracotta
   2. Kiln
3. Chemical vapor deposition
4. Cork (material)
5. Glass (Level 3)
   1. Borosilicate glass
   2. Float glass
   3. Fused quartz
   4. Glassblowing
   5. Glass fiber
      1. Glass wool
   6. Safety glass
   7. Soda–lime glass
6. Gutta-percha
7. Knapping
8. Leather (Level 4)
   1. Artificial leather
   2. Hide (skin)
   3. Parchment (Level 4)
      1. Vellum
   4. Suede
   5. Tanning (leather)
9. Mineral wool
10. Natural rubber (Level 3)
    1. Vulcanization
11. Paper (Level 3)
    1. Cardboard
    2. Papermaking
       1. Pulp (paper)
       2. Sizing
    3. Papyrus (Level 4)
    4. Tissue paper
12. Plastic (Level 3)
    1. Carbon fiber reinforced polymer
    2. Fiberglass
    3. Injection moulding
    4. Microplastics
13. Casting

Chemicals

This section contains 8 articles.

1. Adhesive (Level 4)
2. Chemical plant (Level 4)
3. Composite material (Level 4)
4. Explosive (Level 3)
   1. Dynamite (Level 4)
   2. Fireworks (Level 4)
5. Lubricant
6. Petrochemical (Level 4)

Metallurgy

This section contains 55 articles.

1. Metallurgy (Level 3)

Extractive metallurgy

This section contains 8 articles.

1. Extractive metallurgy
2. Gold dredge
3. Mineral processing
   1. Crusher
   2. Mechanical screening
   3. Spiral separator
   4. Stamp mill
   5. Trommel screen

Smelting and steelmaking

This section contains 10 articles.

1. Smelting (Level 4)
2. Blast furnace
3. Bloomery
4. Crucible
5. Electric arc furnace
6. Induction furnace
7. Steelmaking (Level 4)
   1. Basic oxygen steelmaking
   2. Bessemer process
   3. Crucible steel

Metalworking

This section contains 36 articles.

1. Metalworking (Level 4)
2. Anvil
3. Bellows
4. Bending (metalworking)
5. gold leaf
6. Metal casting
   1. Die casting (Level 4)
   2. Lost-wax casting
   3. Sand casting
7. Drawing (manufacturing)
   1. Wire (Level 4)
      1. Barbed wire
8. Electrical discharge machining
9. Extrusion (Level 4)
10. Forge
11. Forging (Level 4)
    1. Power hammer
12. Grinding (abrasive cutting)
    1. Grindstone
13. Heat treating (Level 4)
14. Laser cutting (Level 4)
15. Machining
16. Metal fabrication
17. Plating
    1. Anodizing
    2. Electroplating
    3. Powder coating
18. Precipitation hardening
19. Quenching
20. Rolling (metalworking) (Level 4)
21. Sheet metal
22. Sintering
23. Soldering (Level 4)
24. Welding (Level 4)
25. Work hardening
26. Blacksmith

Textiles

This section contains 64 articles.

1. Textile (Level 3)
   1. Carding

Fabrics and fibers

This section contains 21 articles.

1. Canvas (Level 4)
2. Carbon fibers
3. Cotton (Level 3)
   1. Chino cloth
   2. Denim
   3. Muslin
4. Felt (Level 4)
5. Flannel
6. Fiber (Level 4)
7. Jute
8. Kevlar
9. Linen (Level 4)
10. Polyester (Level 4)
11. Rayon
12. Silk (Level 4)
13. Spandex
14. Thread (textiles) (Level 4)
15. Wool (Level 4)
    1. Cashmere wool
    2. Tweed
16. Yarn (Level 4)

Other techniques

This section contains 14 articles.

1. Basket weaving (Level 4)
2. Crochet (Level 4)
3. Dyeing
   1. Dye (Level 4)
   2. Batik
4. Embroidery (Level 4)
5. Knitting (Level 4)
6. Lace (Level 4)
7. Macramé
8. Textile printing
9. Quilting
   1. Quilt
10. Sewing (Level 4)
    1. Pattern

Spinning

This section contains 12 articles.

1. Hand spinning (Level 4)
   1. Distaff
   2. Spindle (textiles)
2. Open-end spinning
3. Spinning (polymers)
   1. Spinneret (polymers)
4. Ring spinning
5. Spinning frame
   1. Water frame
6. Spinning jenny
7. Spinning mule
8. Spinning wheel

Weaving

This section contains 15 articles.

1. Loom (Level 4)
   1. Jacquard machine
   2. Power loom
   3. Shuttle (weaving)
      1. Flying shuttle
2. Weaving (Level 4)
   1. Braid
   2. Brocade
   3. Damask
   4. Plain weave
   5. Satin
   6. Songket
   7. Tapestry (Level 4)
   8. Twill
   9. Warp and weft

Infrastructure

This section contains 188 articles. See also Arts: Architecture

Basics

This section contains 3 articles.

1. Building (Level 3)
2. Infrastructure (Level 3)
3. Manhole

Building materials

This section contains 42 articles.

1. Brick (Level 4)
   1. Fire brick
2. Cement (Level 4)
   1. Bitumen
   2. Portland cement
3. Concrete (Level 3)
   1. Asphalt concrete
   2. Concrete slab
   3. Precast concrete
   4. Prestressed concrete
   5. Ready-mix concrete
   6. Reinforced concrete
      1. Rebar
   7. Roman concrete
4. Masonry (Level 3)
   1. Brickwork
   2. Stonemasonry
5. Quarry (Level 4)
6. Scaffolding (Level 4)
7. Adobe
8. Construction aggregate
9. Clapboard
10. Mortar (masonry)
11. Lath and plaster
    1. Lath
    2. Plaster
12. Drywall
13. Rammed earth
14. Roof shingle
15. Siding (construction)
16. Stone slab
17. Thatching
18. Tile
19. Wattle and daub
20. Wood (Level 3)
    1. Engineered wood
       1. Wood–plastic composite
    2. Lumber (Level 4)
       1. Sawmill
    3. Wood drying
    4. Woodworking (Level 4)
       1. Carpentry (Level 4)

Environmental remediation

This section contains 6 articles.

1. Environmental remediation
2. Bioremediation
   1. Bioaugmentation
   2. Phytoremediation
3. Groundwater remediation
4. Soil vapor extraction

Infrastructure by type

This section contains 56 articles.

Building elements

This section contains 4 articles.

1. Elevator (Level 4)
2. Escalator
3. Foundation (engineering) (Level 4)
4. Lighting (Level 4)

Coastal infrastructure

This section contains 11 articles.

1. Breakwater (structure)
2. Dock (Level 4)
   1. Dry dock
   2. Marina
3. Harbor (Level 4)
4. Lighthouse (Level 4)
5. Pier (Level 4)
   1. Maritime passenger terminal
6. Port (Level 4)
   1. Container port
7. Seawall

Ceremonial buildings

This section contains 2 articles.

1. Pagoda (Level 4)
2. Pyramid (Level 4)

Commercial buildings

This section contains 4 articles.

1. Convention center
2. Data center
3. Office (Level 4)
4. Warehouse (Level 4)

Mixed-use buildings

This section contains 3 articles.

1. Military base
2. Tower block (Level 4)
3. Skyscraper (Level 4)

Earthworks

This section contains 2 articles.

1. Earthworks (engineering)
   1. Trench

Fire protection

This section contains 4 articles.

1. Fire safety
2. Fire alarm system
3. Fire hydrant
4. Smoke detector

Hydraulic infrastructure

This section contains 12 articles.

1. Cistern
2. Cofferdam
3. Dam (Level 3)
   1. Caisson (engineering)
4. Dredging
5. Flood management (Level 4)
   1. Flood control in the Netherlands
6. Levee (Level 4)
7. Reservoir (Level 4)
8. Drainage (Level 4)
   1. Rain gutter
   2. Sluice

Transport infrastructure

This section contains 14 articles. See also #Transportation section

1. Bridge (Level 3)
   1. Cable-stayed bridge
   2. Cantilever bridge
   3. Drawbridge
   4. Pontoon bridge
   5. Suspension bridge
   6. Trestle bridge
   7. Truss bridge
   8. Viaduct
2. Causeway
3. Tunnel (Level 4)
   1. Underwater tunnel
   2. Tunnel construction
      1. Tunnel boring machine

Specific infrastructure

This section contains 81 articles.

See "Transportation" and "Energy" section for infrastructure in respective discipline

Dams

This section contains 26 articles.

1. Aswan High Dam (Level 4)
2. Akosombo Dam
3. Atatürk Dam
4. Bratsk Hydroelectric Power Station
5. New Croton Dam
6. Delta Works
7. Euphrates Dam
8. Fort Peck Dam
9. Gordon Dam
10. Grand Coulee Dam
11. Grand Ethiopian Renaissance Dam
12. Grande Dixence Dam
13. Guri Dam
14. Enguri Dam
15. Hoover Dam (Level 4)
16. Itaipu Dam (Level 4)
17. Kariba Dam
18. Mangla Dam
19. Nurek Dam
20. Oroville Dam
21. Rogun Dam
22. Sup'ung Dam
23. Tarbela Dam
24. Three Gorges Dam (Level 4)
25. Vajont Dam
26. Zuiderzee Works

Bridges

This section contains 48 articles.

1. Akashi Kaikyo Bridge (Level 4)
2. Alcántara Bridge
3. Astoria–Megler Bridge
4. Auckland Harbour Bridge
5. Banpo Bridge
6. Bosphorus Bridge
7. Bridge of Sighs
8. Bridge of the Americas
9. Britannia Bridge
10. Brooklyn Bridge (Level 4)
11. Charles Bridge
12. Confederation Bridge
13. Danyang–Kunshan Grand Bridge
14. El Ferdan Railway Bridge
15. Forth Bridge
16. Gateshead Millennium Bridge
17. George Washington Bridge
18. Golden Gate Bridge (Level 4)
19. Great Belt Bridge
20. Great Seto Bridge
21. Humber Bridge
22. Qingdao Jiaozhou Bay Bridge
23. Kapellbrücke
24. King Fahd Causeway
25. London Bridge
26. Mackinac Bridge
27. Manhattan Bridge
28. Mehmed Paša Sokolović Bridge
29. Menai Suspension Bridge
30. Millau Viaduct
31. Pont Alexandre III
32. Pont du Gard
33. Pont Neuf
34. Ponte Sant'Angelo
35. Ponte Vecchio
36. Rainbow Bridge (Niagara Falls)
37. Rainbow Bridge (Tokyo)
38. Rialto Bridge
39. San Francisco–Oakland Bay Bridge
40. Si-o-se-pol
41. Stari Most
42. Sydney Harbour Bridge
43. Tacoma Narrows Bridge
44. The Iron Bridge
45. Tower Bridge (Level 4)
46. Trajan's Bridge
47. Vasco da Gama Bridge
48. Verrazzano–Narrows Bridge

Tunnels

This section contains 3 articles.

1. Channel Tunnel (Level 4)
2. Gotthard Base Tunnel
3. Seikan Tunnel

Multi-modal crossings

This section contains 4 articles.

1. Chesapeake Bay Bridge–Tunnel
2. Hong Kong–Zhuhai–Macau Bridge
3. Tokyo Bay Aqua-Line
4. Øresund Bridge

Machinery and tools

This section contains 336 articles.

Machinery and tools: General

This section contains 13 articles.

1. Machine (Level 3)
2. Mechanism (engineering)
3. MEMS
   1. Micromachinery
   2. Nanoelectromechanical systems
4. Robotics (Level 3)
   1. Android (robot)
   2. Animatronics
   3. Automaton
   4. Robot (Level 4)
   5. Robotic arm
   6. Leg mechanism
5. User guide

Components and mechanisms

This section contains 75 articles.

Flexible components

This section contains 17 articles.

1. Belt (mechanical)
2. Chain (Level 4)
3. Velcro
4. Net (device)
   1. Mesh
      1. Sieve
   2. Mosquito net
5. Rope (Level 4)
   1. Knot (Level 4)
      1. Bowline
      2. Figure-eight knot
      3. Fisherman's knot
   2. Wire rope
      1. Bowden cable
      2. Flexible shaft
6. Spring (device) (Level 4)
7. String

Rigid components

This section contains 11 articles.

1. Blade
2. Connecting rod
3. Fastener (Level 4)
   1. Nail (fastener) (Level 4)
   2. Nut (hardware) (Level 4)
   3. Rivet (Level 4)
   4. Screw (Level 4)
   5. Washer (hardware)
4. Gear (Level 4)
5. Hook
6. Piston

Simple machine

This section contains 10 articles.

1. Simple machine (Level 3)
2. Inclined plane (Level 4)
3. Lever (Level 3)
4. Pulley (Level 4)
   1. Block and tackle
5. Screw mechanism (Level 4)
   1. Propeller
6. Wedge (Level 4)
7. Wheel (Level 3)
   1. Flywheel

Mechanisms

This section contains 37 articles.

1. Alarm device
   1. Siren (alarm)
2. Brake
   1. Disc brake
3. Camshaft
4. Lock and key (Level 4)
   1. Deadbolt
   2. Disc tumbler lock
   3. Electronic lock
   4. Lever tumbler lock
   5. Padlock
   6. Pin tumbler lock
   7. Skeleton key
5. Kinematic pair
   1. Ball joint
   2. Bearing (mechanical) (Level 4)
   3. Hinge
   4. Rack and pinion
   5. Ratchet (device)
   6. Tappet
   7. Wheel and axle (Level 4)
      1. Axle (Level 4)
6. Linkage (mechanical)
   1. Clutch (Level 4)
   2. Escapement
   3. Four-bar linkage
   4. Gimbal
   5. Pantograph
   6. Whippletree (mechanism)
7. Transmission (mechanical device)
   1. Differential (mechanical device)
   2. Epicyclic gearing
8. Shock absorber
   1. Dashpot
9. Winch
   1. Capstan (nautical)
   2. Windlass

Engines

This section contains 15 articles.

1. Engine (Level 3)
2. Electric motor (Level 3)
   1. Linear motor
3. Steam engine (Level 3)

Internal combustion engines

This section contains 11 articles.

1. Internal combustion engine (Level 3)
2. Diesel engine (Level 4)
3. Petrol engine
4. Reciprocating engine
   1. Four-stroke engine (Level 4)
   2. Two-stroke engine
5. Pistonless rotary engine
   1. Wankel engine
6. Engine configuration
   1. Flat engine
   2. Straight engine
   3. V engine

Hydraulics and pneumatics

This section contains 27 articles.

1. Hydraulics
   1. Hydraulic cylinder
   2. Hydraulic machinery
   3. Hydraulic motor
   4. Hydraulic manifold
   5. Pump
      1. Hydraulic ram
   6. Siphon (Level 4)
2. Pipe (fluid conveyance) (Level 4)
   1. Gasket
   2. Valve (Level 4)
3. Plumbing (Level 4)
   1. Bidet
   2. Plunger
   3. Sink (Level 4)
   4. Toilet (Level 4)
      1. Flush toilet
      2. Portable toilet
      3. Squat toilet
      4. Toilet seat
      5. Urinal
4. Pneumatics
   1. Compressor
   2. Jackhammer
   3. Nail gun
   4. Rivet gun
   5. Vacuum pump

Machinery

This section contains 58 articles.

Farm and garden machinery

This section contains 15 articles.

1. Baler
2. Chainsaw (Level 4)
3. Combine harvester (Level 4)
4. Cotton gin (Level 4)
5. Cotton picker
6. Cultivator (Level 4)
7. Irrigation sprinkler (Level 4)
8. Lawn mower (Level 4)
9. Planter (farm implement)
10. Reaper
11. Reaper-binder
12. Seed drill
13. Swather
14. Threshing machine
15. Transplanter

Household appliances

This section contains 29 articles.

1. Home appliance (Level 4)
2. Major appliance
3. Barbecue grill
4. Blender
5. Clothes dryer (Level 4)
6. Clothes iron
7. Coffeemaker
8. Dishwasher (Level 4)
9. Furnace (central heating)
10. Hair dryer
11. Hair iron
12. Humidifier
13. Ironing (Level 4)
14. Juicer
15. Microwave oven (Level 4)
    1. Cavity magnetron (Level 4)
16. Mixer (appliance)
17. Oven (Level 3)
    1. Convection oven
18. Refrigerator (Level 4)
19. Rice cooker
20. Sewing machine (Level 4)
21. Slow cooker
22. Stove (Level 4)
    1. Electric stove
23. Vacuum cleaner (Level 4)
24. Washing machine (Level 4)
25. Water dispenser
26. Water heating

Industrial machinery

This section contains 14 articles.

1. Centrifuge (Level 4)
   1. Ultracentrifuge
2. Crane (machine) (Level 4)
3. Forklift
4. Mill (grinding)
   1. Millstone
      1. Quern-stone
5. Machine tool
   1. Lathe (Level 4)
   2. Machine press (Level 4)
   3. Milling (machining)
   4. Computer numerical control
6. Potter's wheel (Level 4)
7. Trip hammer

Tools

This section contains 148 articles.

1. Tool (Level 2)
2. Adhesive tape
3. Lifting equipment
   1. Hoist (device)
   2. Jack (device)
4. Tongs

Agricultural tools

This section contains 16 articles.

1. Archimedes' screw (Level 4)
2. Flail (tool)
3. Harrow (tool) (Level 4)
4. Hoe (tool) (Level 4)
5. Machete (Level 4)
6. Mattock
7. Pitchfork
8. Plough (Level 4)
9. Rake (tool) (Level 4)
10. Roller (agricultural tool)
11. Scythe
12. Sickle (Level 4)
13. Shadoof
14. Shovel (Level 4)
15. Trowel
16. Wheelbarrow (Level 4)

Artist's and drafting tools

This section contains 18 articles.

1. Compass (drawing tool)
2. Colored pencil
3. Crayon
4. Drafting machine
5. Drawing board
6. Easel
7. Hole punch
8. Modelling clay (Level 4)
9. Paint (Level 4)
   1. Acrylic paint
   2. Enamel paint
   3. Oil paint
   4. Tempera
   5. Varnish
10. Brush (Level 4)
11. Pastel
12. Pigment (Level 4)
13. T-square

Containers

This section contains 26 articles.

1. Container (Level 4)
2. Aluminum can
3. Bag
   1. Paper bag
   2. Plastic bag
4. Bank vault
5. Barrel
6. Basket
7. Bottle
   1. Plastic bottle
   2. Water bottle
8. Box
   1. Cardboard box
   2. Crate
9. Bucket
10. Cage
11. Envelope
12. Intermodal container
13. Jar
14. Locker
15. Packaging
16. Pressure vessel
17. Rubber band
18. Safe
19. Steel and tin cans
20. Funnel

Hand tools

This section contains 27 articles.

1. Adze
2. Axe (Level 4)
3. Broom
4. Chalk line
5. Chisel (Level 4)
6. Clamp (tool) (Level 4)
7. Crowbar
8. Drilling (Level 4)
9. Hammer (Level 4)
10. Hook (hand tool)
11. Mallet
12. Mop
13. Mortar and pestle
14. Pickaxe
15. Plane (tool) (Level 4)
16. Pliers
17. Saw (Level 4)
18. Scissors (Level 4)
19. Screwdriver
20. Sledgehammer
21. Stone tool
    1. Clovis point
    2. Ground stone
    3. Hand axe
    4. Microlith
    5. Prismatic blade
22. Wrench

Law enforcement equipment

This section contains 4 articles.

1. Breathalyzer
2. Physical restraint
   1. Electronic tagging
   2. Handcuffs

Measuring instruments

This section contains 22 articles.

1. Instrumentation (Level 4)
2. Altimeter
3. Barometer (Level 4)
4. Calipers (Level 4)
5. Feeler gauge
6. Ruler (Level 4)
   1. Metre-stick
   2. Tape measure
7. Photometer (Level 4)
8. Spectrometer (Level 4)
   1. Optical spectrometer
9. Thermometer (Level 4)
10. Astrolabe
11. Calorimeter
12. Geiger counter
13. Metal detector
14. Odometer
15. Seismometer
16. Speedometer
17. Torque wrench
18. Vernier scale
19. Polygraph

Surveying tools

This section contains 17 articles.

1. Alidade
2. Graphometer
3. Gunter's chain
4. Laser rangefinder
   1. Lidar
5. Level (optical instrument)
   1. Inclinometer
   2. Level staff
   3. Plumb bob
   4. Spirit level
   5. Tiltmeter
6. Plane table
7. Reticle
8. Stadimeter
9. Surveyor's wheel
10. Theodolite (Level 4)
    1. Total station

Writing tools

This section contains 12 articles.

1. Blackboard
2. Eraser
3. Ink (Level 4)
4. Inkwell
5. Pen (Level 4)
   1. Ballpoint pen
   2. Fountain pen
   3. Marker pen
   4. Quill
6. Pencil (Level 4)
   1. Pencil sharpener
7. Whiteboard