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Wikipedia:Vital articles/Level/5/Technology

In today's world, Wikipedia:Vital articles/Level/5/Technology has gained great relevance in various areas of society. Its impact has been felt in politics, culture, technology and people's daily lives. Wikipedia:Vital articles/Level/5/Technology has generated debates, controversies and significant changes that have marked a before and after in recent history. In this article, we will thoroughly explore the importance of Wikipedia:Vital articles/Level/5/Technology, its implications and its influence on different aspects of modern life. From its origins to its consequences, we will analyze in detail the role that Wikipedia:Vital articles/Level/5/Technology plays in the current world and its projection into the future.

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Vital articles is a list of subjects for which Wikipedia should have corresponding high-quality articles. It serves as a centralized watchlist to track the status of Wikipedia's most essential articles. This is one of the sub-lists of the fifty thousand article Vital articles/Level 5 and is currently under construction.

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The progress bar is auto-updated via category count, and the symbols and article counts are updated daily by User:cewbot. Please read the FAQ before modifying the article list.

Quota 3,200 articles.

Total 3,247 articles.

Class #Articles
FA 20
GA 74
A 2
B 699
C 1,690
LIST 6
FFA 60
DGA 87
Start 728
Stub 30

Technology

This section contains 3247 articles.

Technology: General

This section contains 20 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 65 articles.

Basics

This section contains 65 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 51 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
  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. Electronic 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

Agriculture

This section contains 233 articles. See Agriculture in the Society category; also see History of Agriculture and related articles under History, or the Everyday life category for basic agricultural products

Basics

This section contains 11 articles.

  1. Arable land
  2. Crop (Level 4)
    1. Cash crop
    2. Nonfood crop
    3. Fiber crop
  3. Agricultural machinery
  4. Agricultural cycle
    1. Growing season
    2. Season extension
  5. Agricultural land
  6. Pasture

Academic disciplines

This section contains 10 articles.

  1. Agricultural science (Level 4)
  2. Agricultural chemistry
  3. Agricultural economics
  4. Agricultural soil science
  5. Agroecology
  6. Agricultural policy
  7. Agricultural geography
  8. Agricultural education
    1. Agricultural extension
  9. Agrometeorology

Forms of agriculture

This section contains 41 articles.

  1. Beekeeping (Level 4)
  2. Dairy (Level 4)
    1. Dairy farming
  3. Dryland farming
  4. Desert farming
  5. Rainfed agriculture
  6. Extensive farming
  7. Gardening (Level 4)
  8. Intensive farming (Level 4)
  9. Mechanised agriculture
  10. Orchard (Level 4)
  11. Organic farming (Level 4)
  12. Genetically modified crops
  13. Sustainable agriculture (Level 4)
  14. Permaculture
  15. Subsistence agriculture (Level 4)
  16. Urban agriculture
  17. Pastoralism
  18. Plantation
  19. Shifting cultivation
  20. Regenerative agriculture
  21. Intensive animal farming
  22. Free range
  23. Hydroponics
  24. Sericulture
  25. Viticulture
  26. Fungiculture
  27. Olericulture
  28. Slash-and-burn agriculture
  29. Vertical farming
  30. Polyculture
    1. Multiple cropping
    2. Intercropping

Aquaculture

This section contains 8 articles.

  1. Aquaculture (Level 4)
  2. Mariculture
  3. Algaculture
  4. Fish farming
  5. Freshwater prawn farming
  6. Integrated multi-trophic aquaculture
  7. Marine shrimp farming
  8. Seaweed farming

Pest and disease control

This section contains 25 articles.

  1. Pest control
  2. Aerial application
  3. Acaricide
  4. Agrochemical
  5. Agent Orange
  6. Aldrin
  7. Biological pest control
  8. Chemosterilant
  9. DDT
  10. Defoliant
  11. Fumigation
  12. Fungicide
  13. Herbicide
  14. Insecticide
  15. Integrated pest management
  16. Lindane
  17. Malathion
  18. Methoxychlor
  19. Pest (organism)
  20. Pesticide (Level 4)
  21. Rodenticide
  22. Scarecrow
  23. Soil steam sterilization
  24. Tetraethyl pyrophosphate
  25. Toxaphene

Buildings and infrastructure

This section contains 29 articles.

  1. Apiary
  2. Barn (Level 4)
  3. Farm (Level 4)
  4. Fish hatchery
  5. Granary (Level 4)
  6. Grain elevator
  7. Greenhouse
  8. Orangery
  9. Paddy field
  10. Pavilion
  11. Plant nursery
  12. Raised field
    1. Chinampa
    2. Waru Waru
  13. Seedbed
  14. Shed
  15. Silo (Level 4)
  16. Stable (Level 4)
  17. Terrace (earthworks)
  18. Ranch

Gardens

This section contains 9 articles.

  1. Garden (Level 3)
  2. Arboretum
  3. Botanical garden
  4. Chinese garden
  5. English landscape garden
  6. French formal garden
  7. Japanese garden
  8. Persian gardens
  9. Spanish garden

Animal husbandry

This section contains 22 articles.

  1. Animal husbandry (Level 3)
  2. Animal slaughter
  3. Breed (Level 4)
  4. Culling
  5. Domestication (Level 3)
  6. Goat farming
  7. Horseshoe
  8. Animal feed
    1. Fodder
      1. Hay (Level 4)
      2. Straw
    2. Forage
    3. Fish meal
  9. Livestock (Level 4)
  10. Pig farming
  11. Poultry farming
  12. Selective breeding (Level 4)
    1. Animal breeding
    2. Purebred
  13. Sheep farming
  14. Slaughterhouse
  15. Antibiotic use in livestock

Agronomy

This section contains 29 articles.

Basics

This section contains 4 articles.

  1. Agronomy (Level 4)
  2. Plant breeding (Level 4)
    1. Cultivar (Level 4)
  3. Crop yield

Agronomical techniques

This section contains 8 articles.

  1. Harvest (Level 4)
    1. Threshing
    2. Winnowing
  2. Irrigation (Level 4)
  3. Tillage (Level 4)
  4. Silage
  5. Sowing
  6. Postharvest

Soil and nutrient management

This section contains 17 articles. See "Pedology" in Earth Science

  1. Nutrient management
  2. Beneficial organism
  3. Cover crop
  4. Crop rotation
    1. Norfolk four-course system
    2. Three-field system
  5. Fertilizer (Level 3)
    1. Compost
    2. Vermicompost
    3. Green manure
    4. Guano
    5. Manure
  6. Mulch
    1. Plastic mulch
  7. Nitrogen fixation
  8. No-till farming
  9. Soil salinity control

Horticulture

This section contains 40 articles.

  1. Horticulture (Level 4)
  2. Espalier
  3. Floriculture
  4. Grafting
  5. Layering (horticulture)
  6. Plant propagation
  7. Pollarding
  8. Pollination management
  9. Pruning
  10. Smudge pot
  11. Topiary
  12. Transplanting
  13. Basal shoot
  14. Pomology
  15. Companion planting
  16. Genetically modified tree
  17. Indigenous horticulture
  18. Urban horticulture
  19. Hardiness (plants)
    1. Hardiness zone
  20. Drought tolerance
  21. Tropical horticulture

Hunting and fishing

This section contains 18 articles.

  1. Fishery
  2. Fishing line
    1. Dropline
    2. Longline fishing
  3. Fishing net
    1. Gillnetting
    2. Seine fishing
  4. Fishing rod
    1. Fish hook
    2. Fishing lure
    3. Fishing reel
    4. Fishing float
  5. Fish trap
    1. Crab trap
    2. Fishing weir
    3. Lobster trap
  6. Trapping
    1. Bait

Trees and forestry

This section contains 6 articles.

  1. Agroforestry
  2. Arboriculture
  3. Logging
  4. Silviculture
  5. Coppicing
  6. Controlled burn

Agriculture, labor and economy

This section contains 17 articles.

  1. Community-supported agriculture
    1. Teikei
  2. Corporate farming
  3. Family farm
  4. Agricultural cooperative
  5. Agribusiness
  6. Agricultural marketing
  7. Sharecropping
  8. Tenant farmer

Working animal

This section contains 8 articles.

  1. Working animal
  2. Draft horse
  3. Guide dog
  4. Ox
  5. Pack animal
  6. Police dog
  7. Service animal
  8. Sled dog

Agriculture and ecology

This section contains 3 articles.

  1. Environmental impact of agriculture
  2. Agricultural expansion
  3. Agricultural pollution

Agricultural machinery and tools

See "Agricultural tools" and "Farm and Garden Machinery" in Technology : Machinery and tools

Biotechnology

This section contains 45 articles. See also : Selective Breeding in Agriculture; Fermentation in Biology

  1. Biotechnology (Level 3)
  2. Cell culture
    1. Plant tissue culture
  3. Genetic engineering (Level 4)
  4. Recombinant DNA
    1. Genetically modified organism (Level 4)
    2. CRISPR gene editing
    3. Molecular cloning
  5. Cloning (Level 4)
    1. Somatic cell nuclear transfer
  6. Gel electrophoresis (Level 4)
  7. Polymerase chain reaction (Level 4)
  8. Western blot
  9. Cyborg
  10. Whole genome sequencing
  11. Tissue engineering
  12. Biochip
  13. De-extinction
  14. Genome editing
  15. Nuclear transfer
  16. Pharming (genetics)
  17. Biomimetics
  18. DNA microarray
  19. Micropropagation
  20. Biological hazard
  21. Bioterrorism
  22. Pharmacogenomics
  23. Biopharmaceutical
  24. Genetic testing
  25. Synthetic biopolymer
  26. Biomaterial
  27. Agricultural biotechnology
  28. Environmental biotechnology
  29. Bioreactor
  30. Gene therapy
  31. Stem-cell therapy
  32. Antisense therapy
  33. Organ printing
  34. Protein engineering
  35. Anaerobic digestion
  36. Bioleaching
  37. Biomining
  38. Somatic fusion
  39. Synthetic biology
  40. Induced pluripotent stem cell

Computing and information technology

This section contains 609 articles. For abstract topics in computer science, see Mathematics: Theoretical computer science (Level 5)

Basics

This section contains 12 articles.

  1. Computing (Level 4)
  2. Information technology (Level 4)
  3. Abacus (Level 4)
  4. Calculator (Level 4)
  5. Slide rule
  6. Data (computer science) (Level 4)
    1. Data communication (Level 4)
    2. Metadata
  7. File sharing
  8. Human–computer interaction
  9. Informatics
  10. Open source

Computer science

This section contains 36 articles.

  1. Computer science (Level 3)
  2. Computer architecture (Level 4)
  3. Computer simulation (Level 4)
  4. Parallel computing (Level 4)
    1. General-purpose computing on graphics processing units
  5. Augmented reality
  6. Virtual reality
  7. Concurrent computing
    1. Monitor (synchronization)
  8. Floating-point arithmetic
  9. Real-time computing
  10. Computer graphics (computer science)
    1. Color management
    2. Transform, clipping, and lighting


Artificial intelligence

This section contains 22 articles.

  1. Artificial intelligence (Level 3)
  2. AI alignment
  3. Artificial general intelligence
  4. Artificial intelligence visual art
  5. Neural network (machine learning)
  6. Biometrics
    1. Facial recognition system
  7. Computer chess
  8. Computer Go
  9. Computer vision
  10. Existential risk from artificial intelligence
  11. Generative artificial intelligence
  12. Large language model (Level 4)
  13. Machine learning
    1. Deep learning
  14. Natural language processing
    1. Speech recognition
    2. Machine translation
  15. Philosophy of artificial intelligence
  16. Technological singularity
  17. Turing test
  18. Weak artificial intelligence

Computer architecture concepts

This section contains 26 articles.

  1. Cache (computing)
  2. Cache coherence
  3. Distributed computing
    1. Computer cluster
    2. Grid computing
  4. Cloud computing
  5. Optical computing
  6. Quantum computing
  7. Von Neumann architecture
  8. 8-bit computing
  9. 16-bit computing
  10. 32-bit computing
  11. 64-bit computing
  12. Endianness
  13. Multithreading (computer architecture)
  14. Multiprocessing
  15. Instruction set architecture
    1. x86
      1. x86-64
    2. ARM architecture family
    3. IBM POWER architecture
    4. MIPS architecture
    5. Very long instruction word
  16. System time
    1. Epoch (computing)
    2. Unix time

Computer security

This section contains 40 articles.

  1. Computer security (Level 4)
  2. Firewall (computing)
  3. Transport Layer Security
  4. Vulnerability (computer security)
    1. Zero-day vulnerability
  5. Denial-of-service attack
    1. Botnet
  6. Copy protection
    1. Digital rights management
  7. Malware (Level 4)
    1. Computer virus
    2. Computer worm
    3. Trojan horse (computing)
    4. Ransomware
    5. Spyware
  8. Authentication (Level 4)
    1. Password
    2. Security token
    3. Multi-factor authentication
    4. User (computing)
  9. Security through obscurity
    1. Obfuscation (software)
    2. Steganography

Cryptography

This section contains 17 articles.

  1. Cryptography (Level 3)
  2. Blockchain
  3. Block cipher
  4. Brute-force attack
  5. Caesar cipher
  6. Cipher
  7. Cryptanalysis
  8. Cryptogram
  9. Digital signature
  10. Encryption (Level 4)
  11. Enigma machine
  12. Key (cryptography)
  13. One-time pad
  14. Public-key cryptography
    1. Diffie–Hellman key exchange
    2. RSA cryptosystem
  15. Symmetric-key algorithm

Computer hardware

This section contains 81 articles.

  1. Computer hardware (Level 4)
  2. Computer (Level 2)
  3. Booting
    1. BIOS
      1. UEFI
    2. Reboot
  4. Processor (computing)
    1. Central processing unit (Level 4)
      1. Microprocessor
        1. Multi-core processor
    2. Coprocessor
  5. Motherboard
  6. Processor register
  7. Floating-point unit
  8. Graphics processing unit
  9. Arithmetic logic unit
  10. Digital signal processor
  11. Bus (computing)
    1. SATA
    2. Parallel ATA
    3. Industry Standard Architecture
    4. Peripheral Component Interconnect
    5. PCI Express
    6. Front-side bus
  12. Expansion card
    1. Sound card
    2. Graphics card
    3. PC Card
    4. ExpressCard
  13. Modem
  14. Device driver
  15. Moore's law
  16. Clock rate
  17. Embedded system
  18. Real-time clock
  19. Computer cooling
  20. Analog computer
  21. Stored-program computer
  22. Hardware acceleration
  23. Plug and play
  24. Input/output
    1. Input device
    2. Output device

Types of computers

This section contains 14 articles.

  1. IBM PC compatible
  2. Mainframe computer
  3. Microcomputer
  4. Mobile device (Level 4)
    1. Smartphone (Level 4)
    2. Tablet computer
    3. Smartwatch
  5. Personal computer (Level 4)
    1. Desktop computer
    2. Gaming computer
    3. Home computer
    4. Laptop
  6. Supercomputer (Level 4)
  7. Workstation

User interface

This section contains 24 articles.

  1. User interface (Level 4)
  2. Graphical user interface
    1. Window (computing)
    2. X Window System
  3. Command-line interface
  4. Computer keyboard (Level 4)
  5. Computer monitor (Level 4)
  6. Cut, copy, and paste
  7. Virtual reality headset
  8. Computer port (hardware)
    1. IEEE 1394
    2. USB
      1. USB-C
    3. D-subminiature
    4. Digital Visual Interface
    5. DisplayPort
    6. HDMI
    7. VGA connector
    8. Thunderbolt (interface)
  9. Pointing device
    1. Computer mouse (Level 4)
    2. Touchpad
    3. Touchscreen (Level 4)
  10. Webcam

Computer software

This section contains 40 articles.

  1. Software (Level 4)
  2. Application software
  3. Chatbot
  4. Computer program (Level 4)
  5. Database (Level 4)
    1. Data mining
    2. Big data
  6. Emulator
  7. Integrated development environment
  8. Media player software
  9. Mobile app
  10. Open-source software (Level 4)
  11. Spreadsheet (Level 4)
  12. System software
  13. Web application
    1. Webmail
    2. Web content management system
  14. Web browser (Level 4)
  15. Word processor (Level 4)
  16. Desktop publishing
  17. Plug-in (computing)
  18. POSIX
  19. GNU Project
  20. Input method

Operating systems

This section contains 16 articles.

  1. Firmware
  2. Operating system (Level 4)
    1. Real-time operating system
  3. Virtual machine
  4. Kernel (operating system)
  5. Execution (computing)
  6. Thrashing (computer science)
  7. Thread (computing)
  8. Preemption (computing)
  9. Process (computing)
  10. Computer multitasking
  11. Scheduling (computing)
  12. System call
  13. Time-sharing
  14. Working set
  15. Mobile operating system

Data storage and memory

This section contains 66 articles.

For units of information (bit, byte, megabyte, etc.), see Physical sciences/Basics and measurement

  1. Computer file (Level 4)
  2. Backup
  3. Barcode (Level 4)
    1. QR code
  4. File system (Level 4)
    1. HFS Plus
    2. File Allocation Table
    3. NTFS
    4. ext4
    5. ISO 9660
    6. Universal Disk Format
  5. Directory (computing)
  6. Filename extension
  7. Data storage (Level 4)
    1. Computer data storage
    2. Cloud storage
  8. RAID
  9. Disk partitioning
  10. Computer memory
  11. Binary file
  12. Text file
    1. Formatted text
    2. Plain text

File formats

This section contains 18 articles.

  1. File format
  2. Archive file
    1. ZIP (file format)
    2. 7z
  3. Document file format
    1. PDF
  4. Image file format
    1. GIF
    2. JPEG
    3. TIFF
    4. PNG
    5. SVG
  5. Audio coding format
    1. MP3
  6. Video coding format
  7. Container format
    1. MPEG-4
    2. Ogg

Volatile memory

This section contains 5 articles.

  1. Volatile memory
  2. Random-access memory (Level 4)
    1. Dynamic random-access memory
    2. Static random-access memory
  3. Virtual memory

Non-volatile memory

This section contains 20 articles.

  1. Non-volatile memory
  2. Read-only memory (Level 4)
  3. Magnetic storage
    1. Floppy disk
    2. Hard disk drive (Level 4)
    3. Magnetic-tape data storage
  4. Flash memory
    1. USB flash drive
    2. Solid-state drive
    3. Memory card (Level 4)
      1. CompactFlash
      2. SD card
      3. MultiMediaCard
      4. Universal Flash Storage
  5. Optical disc (Level 4)
    1. Compact disc
    2. DVD
    3. LaserDisc
    4. Blu-ray
  6. Punched card (Level 4)

Networks

This section contains 73 articles.

  1. Computer network (Level 4)
    1. Intranet
  2. Email (Level 4)
    1. Internet Message Access Protocol
    2. Simple Mail Transfer Protocol
    3. Spamming
  3. Bluetooth
  4. Cellular network
    1. GSM
  5. Client–server model
  6. Content delivery network
  7. Ethernet (Level 4)
  8. Information system
  9. Network interface controller
  10. Network packet
  11. Network topology
  12. Network switch
  13. Node (networking)
  14. Internet of things
  15. Private network
  16. Reverse proxy
  17. Router (computing) (Level 4)
  18. Routing
  19. Server (computing)
    1. Proxy server
    2. Web server
  20. Subnet
  21. Tunneling protocol
  22. Wireless network
    1. Wi-Fi (Level 4)
    2. Wireless mesh network

Internet

This section contains 42 articles. For Internet culture, see Society and social sciences/Culture#Internet medium

  1. Internet (Level 3)
  2. ARPANET
  3. Communication protocol
  4. Common Gateway Interface
  5. Domain name
  6. File Transfer Protocol
  7. Hashtag
  8. HTTP (Level 4)
    1. HTTPS
  9. Hyperlink
  10. Instant messaging
    1. Online chat
    2. IRC
  11. Internet protocol suite (Level 4)
    1. Internet Protocol
    2. IP address
    3. IPv4
    4. IPv6
    5. Transmission Control Protocol
  12. Internet service provider
  13. Peer-to-peer
    1. BitTorrent
    2. Napster
  14. Social media (Level 4)
    1. Blog
    2. Bulletin board system
    3. Chat room
    4. Internet forum
    5. Online dating
    6. Social networking service
    7. Usenet
  15. Web 2.0
  16. Search engine (Level 4)
  17. Tor (network)
  18. URL
  19. Website (Level 4)
    1. Home page
    2. Web page
    3. Wiki
  20. World Wide Web (Level 4)
    1. Dark web
    2. Deep web

Specific websites and other computing services

This section contains 43 articles.

Cloud server

This section contains 2 articles.

  1. Amazon Web Services
  2. Google Cloud Platform

Multimedia

This section contains 4 articles.

  1. Netflix
  2. Pornhub
  3. Steam (service)
  4. YouTube (Level 4)

Portals/Platform sites

This section contains 2 articles.

  1. MSN
  2. Naver

Utility

This section contains 6 articles.

  1. GitHub
  2. Google Maps
  3. Internet Archive
  4. IMDb
  5. Rotten Tomatoes
  6. Wikipedia (Level 4)

Science

This section contains 1 article.

  1. Berkeley Open Infrastructure for Network Computing

Search engines

This section contains 2 articles.

  1. Google Search
  2. Microsoft Bing

Social network and blogging

This section contains 26 articles.

  1. 2channel
  2. 4chan
  3. Blogger (service)
  4. DeviantArt
  5. Discord
  6. Facebook (Level 4)
  7. Instagram
  8. Line (software)
  9. LinkedIn
  10. Myspace
  11. Pinterest
  12. Reddit
  13. Slack (software)
  14. Skype
  15. Snapchat
  16. Telegram (software)
  17. Tencent QQ
  18. TikTok
  19. Tinder (app)
  20. Tumblr
  21. Twitch (service)
  22. Twitter
  23. Weibo
  24. VK (service)
  25. WeChat
  26. WhatsApp

Software development

This section contains 106 articles.

Software development: General

This section contains 63 articles.

  1. Software development
  2. Software prototyping
  3. Reusability
  4. Software portability
  5. Transparency (human–computer interaction)
  6. Library (computing)
  7. Formal specification
  8. Formal verification
  9. Software design
  10. Abstraction (computer science)
  11. Variable (high-level programming)
  12. Function (computer programming)
  13. Pointer (computer programming)
  14. Recursion (computer science)
  15. Iteration
  16. Computer programming (Level 4)
  17. Flowchart
  18. Source code
  19. Bytecode
  20. Object code
  21. Executable
  22. Parameter (computer programming)
  23. Collation
  24. Universal Product Code
  25. Character encoding (Level 4)
    1. ASCII
    2. Unicode
      1. UTF-8
  26. Error correction code
  27. Compiler (Level 4)
  28. Interpreter (computing)
  29. Control flow
  30. Macro (computer science)
  31. Regular expression
  32. Calling convention
  33. Programming language (Level 4)
  34. Programming paradigm (Level 4)
    1. Functional programming (Level 4)
    2. Structured programming
    3. Modular programming
    4. Object-oriented programming (Level 4)
      1. Polymorphism (computer science)
    5. Declarative programming
    6. Imperative programming
    7. Logic programming
  35. API
    1. Carbon (API)
    2. Cocoa (API)
    3. Open Database Connectivity
    4. Windows API
      1. DirectX
        1. Direct3D
    5. OpenGL
    6. Vulkan
  36. Software testing
  37. Software bug
  38. Debugging
  39. Application checkpointing
  40. Exception handling
  41. Version control
  42. Patch (computing)
  43. Software maintenance
  44. Software documentation

Programming languages

This section contains 43 articles.

  1. Syntax (programming languages)
  2. Metasyntax
  3. Backus–Naur form
  4. Type conversion
  5. Data type
  6. Delimiter
  7. Operator overloading
  8. Language binding
  9. Low-level programming language
    1. Machine code
    2. Assembly language (Level 4)
  10. High-level programming language
  11. Shading language
  12. R (programming language)
Specific programming languages: general

This section contains 12 articles.

  1. C (programming language) (Level 4)
  2. C++
  3. C Sharp (programming language)
  4. Objective-C
  5. Haskell
  6. Java (programming language) (Level 4)
  7. Kotlin
  8. Lisp (programming language)
  9. Lua
  10. Scala (programming language)
  11. Swift (programming language)
  12. Visual Basic (.NET)
Data modeling languages

This section contains 1 article.

  1. SQL
Markup languages

This section contains 3 articles.

  1. HTML (Level 4)
    1. HTML5
  2. XML
Scripting languages

This section contains 6 articles.

  1. Python (programming language)
  2. Ruby (programming language)
  3. PHP
  4. Perl
  5. JavaScript (Level 4)
  6. Shell script
"Historical" languages

This section contains 6 articles.

  1. ALGOL
  2. BASIC
  3. Pascal (programming language)
  4. Fortran
  5. Ada (programming language)
  6. COBOL
Stylesheet languages

This section contains 1 article.

  1. CSS

Specific hardware

This section contains 31 articles.

  1. Amiga
  2. Apple II
  3. Arduino
  4. Commodore 64
  5. Deep Blue (chess computer)
  6. IBM Personal Computer
  7. Mac (computer) (Level 4)
    1. iMac
  8. PC-98
  9. Raspberry Pi
  10. TRS-80
  11. ZX Spectrum

Early computers

This section contains 15 articles.

  1. Analytical engine
  2. Antikythera mechanism
  3. Atanasoff–Berry computer
  4. Atlas (computer)
  5. Colossus computer
  6. Difference engine
  7. EDSAC
  8. EDVAC
  9. ENIAC (Level 4)
  10. IBM 7030 Stretch
  11. Manchester computers
  12. Harvard Mark I
  13. UNIVAC I
  14. Whirlwind I
  15. Z3 (computer)

Mobile devices

This section contains 4 articles.

  1. Chromebook
  2. iPad
  3. iPhone (Level 4)
  4. Samsung Galaxy

Specific software

This section contains 55 articles.

Artificial Intelligence

This section contains 2 articles.

  1. AlphaGo
  2. ChatGPT

Browsers

This section contains 5 articles.

  1. Firefox
  2. Google Chrome
  3. Internet Explorer
  4. Microsoft Edge
  5. Safari (web browser)

Communication

This section contains 2 articles.

  1. Gmail
  2. Microsoft Outlook

Multimedia

This section contains 9 articles.

  1. Adobe Creative Suite
    1. Adobe Flash
    2. Adobe Photoshop
  2. Auto-Tune
  3. GarageBand
  4. GIMP
  5. iTunes
  6. Microsoft Paint
  7. VLC media player

Office and data management

This section contains 11 articles.

  1. Adobe Acrobat
  2. Emacs
  3. LibreOffice
  4. Microsoft Office
    1. Microsoft Excel
    2. Microsoft PowerPoint
    3. Microsoft Word
  5. MySQL
  6. TeX
  7. WinRAR
  8. Vim (text editor)

Operating Systems

This section contains 20 articles.

  1. Android (operating system) (Level 4)
  2. iOS
  3. DOS
    1. MS-DOS (Level 4)
  4. Mac operating systems
    1. Classic Mac OS
    2. macOS
  5. Microsoft Windows (Level 4)
    1. Windows 3.1
    2. Windows 9x
    3. Windows NT
      1. Windows XP
      2. Windows 7
      3. Windows 10
      4. Windows 11
  6. Symbian
  7. Unix (Level 4)
  8. Unix-like
    1. Linux (Level 4)
      1. Debian

Science and Engineering

This section contains 2 articles.

  1. AutoCAD
  2. MATLAB

System

This section contains 2 articles.

  1. GDK
  2. Wine (software)

Virtualization

This section contains 2 articles.

  1. Java virtual machine
  2. VirtualBox

Electronics

This section contains 115 articles. For topics in electromagnetism, see Physics:Electromagnetism

Electronics: General

This section contains 9 articles.

  1. Electronics (Level 3)
    1. Analogue electronics
    2. Digital electronics
  2. Circuit design (Level 4)
    1. Electronic design automation
    2. Printed circuit board (Level 4)
    3. SPICE
  3. Electronic circuit
    1. Multimeter

Components

This section contains 35 articles.

  1. Electronic component
  2. Amplifier (Level 4)
    1. Operational amplifier
    2. Vacuum tube (Level 4)
  3. Capacitor (Level 4)
    1. Ceramic capacitor
    2. Electrolytic capacitor
    3. Film capacitor
    4. Leyden jar
    5. Supercapacitor
    6. Variable capacitor
  4. Diode (Level 4)
    1. Light-emitting diode (Level 4)
  5. Electrical connector (Level 4)
  6. Inductor (Level 4)
  7. Power supply (Level 4)
    1. Current source
    2. Voltage source
  8. Resistor (Level 4)
    1. Potentiometer
  9. Switch (Level 4)
    1. Knife switch
    2. Relay (Level 4)
    3. Rotary switch
  10. Transducer
    1. Actuator
      1. Solenoid
    2. Sensor (Level 4)
      1. Avalanche photodiode
      2. Photodiode
      3. Photomultiplier tube
      4. Phototube
      5. Thermistor
      6. Thermocouple
  11. Transformer (Level 4)

Consumer electronics

This section contains 3 articles.

  1. Consumer electronics (Level 4)
  2. AC adapter
  3. Remote control (Level 4)

Digital logic

This section contains 16 articles.

  1. Asynchronous circuit
  2. Logic gate
    1. AND gate
    2. Digital buffer
    3. Inverter (logic gate)
    4. NAND gate
    5. NOR gate
    6. OR gate
    7. XOR gate
    8. XNOR gate
  3. Adder (electronics)
    1. Binary multiplier
    2. Subtractor
  4. Flip-flop (electronics)
  5. Synchronous circuit
    1. Clock domain crossing

Functional circuits

This section contains 14 articles.

  1. Bridge circuit
    1. Wheatstone bridge
  2. Electronic oscillator
    1. Clock generator
      1. Clock signal
    2. Crystal oscillator
    3. Variable-frequency oscillator
  3. Frequency mixer
  4. Gyrator
  5. Negative impedance converter
  6. Power inverter
  7. Rectifier
    1. Diode bridge
  8. Voltage regulator

Semiconductors

This section contains 14 articles.

  1. Semiconductor device (Level 4)
  2. Integrated circuit (Level 3)
    1. Application-specific integrated circuit
    2. Charge-coupled device (Level 4)
    3. Field-programmable gate array
    4. System on a chip
      1. Network on a chip
    5. Very-large-scale integration
  3. Transistor (Level 4)
    1. Bipolar junction transistor
    2. Field-effect transistor
      1. MOSFET
    3. Transistor–transistor logic
    4. CMOS

Signal processing

This section contains 17 articles.

  1. Signal processing (Level 4)
    1. Digital signal
  2. Analog-to-digital converter
  3. Digital-to-analog converter
  4. Filter (signal processing) (Level 4)
    1. All-pass filter
      1. Lattice phase equaliser
    2. Band-pass filter
    3. Mechanical filter
    4. High-pass filter
    5. Low-pass filter
  5. Multiplexing
  6. Noise (electronics)
    1. Signal-to-noise ratio (Level 4)
  7. Oscilloscope (Level 4)
  8. Sampling (signal processing)
    1. Nyquist–Shannon sampling theorem

Signal transmission

This section contains 7 articles.

  1. Antenna (radio) (Level 4)
    1. Antenna array
  2. Electromagnetic shielding
    1. Faraday cage
  3. Transmission line
    1. Coaxial cable
    2. Waveguide (Level 4)

Energy

This section contains 185 articles.

Energy: General

This section contains 6 articles.

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

Fuel

This section contains 26 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. Petroleum reservoir
      2. Oil platform
  4. Hydrogen economy
  5. 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
  6. Nuclear fuel
    1. Nuclear fuel cycle

Heating and cooling

This section contains 20 articles.

  1. Heating, ventilation, and air conditioning (Level 4)
    1. Chimney (Level 4)
    2. Fireplace (Level 4)
    3. Heat pump
  2. Air conditioning (Level 4)
    1. Evaporative cooler
    2. Passive cooling
    3. Windcatcher
  3. Boiler
  4. Bonfire
  5. Campfire
  6. Central heating (Level 4)
  7. Fan (machine)
    1. Ceiling fan
  8. Heat exchanger
  9. Lighter
  10. Refrigeration (Level 3)
    1. Refrigerant
    2. Yakhchāl
  11. Torch

Lighting

This section contains 13 articles.

  1. Candle (Level 4)
  2. Electric light (Level 3)
    1. Flashlight
    2. Fluorescent lamp
    3. Incandescent light bulb (Level 4)
    4. Neon lighting
  3. Gas lighting
    1. Gas mantle
  4. Lantern
  5. Match
  6. Oil lamp
  7. Prism lighting
    1. Light tube

Power generation

This section contains 42 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. Nuclear power (Level 3)
    1. Fusion power
      1. Inertial confinement fusion
      2. Tokamak
    2. Nuclear reactor
      1. Breeder reactor
      2. Molten-salt reactor
      3. Heavy water reactor
      4. Small modular reactor
      5. Nuclear marine propulsion
      6. Nuclear meltdown
  5. Solar energy (Level 3)
    1. Solar power (Level 4)
    2. Solar cell (Level 4)
      1. Solar panel
  6. 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)
  7. Turbine (Level 4)
    1. Gas-turbine engine (Level 4)
    2. Steam turbine (Level 4)
    3. Wind turbine (Level 4)
  8. Water wheel
  9. Wind power (Level 3)
    1. Windmill (Level 4)

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. Electrical busbar system
  6. Electric power system
  7. Interconnector
  8. High-voltage direct current
  9. Load management
    1. Electricity market
  10. Overhead power line
  11. Smart grid
  12. Substation
  13. Super grid
  14. Transmission system operator
  15. Transmission tower
  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 3 articles. See "Dams" section in "Specific infrastructure" for hydroelectric power plants

  1. Continental Europe Synchronous Area
  2. Eastern Interconnection
  3. Western Interconnection

Industry

This section contains 223 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 36 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. Sanitation (Level 3)
    1. Sewage
    2. Sewerage
      1. Sanitary sewer (Level 4)
      2. Street gutter
    3. Sewage treatment (Level 4)
      1. Septic tank
    4. Water purification (Level 4)
  11. Soap (Level 4)
  12. Sterilization (microbiology)
  13. Water supply network (Level 4)
    1. Aqueduct (water supply) (Level 4)
    2. Pumping station (Level 4)
    3. Qanat (Level 4)
    4. Water tower (Level 4)
    5. Well (Level 4)

Materials

This section contains 47 articles.

  1. Abrasive (Level 4)
  2. Ceramic (Level 4)
    1. Pottery (Level 3)
      1. Earthenware
      2. Ironstone china
      3. Lithophane
      4. Porcelain (Level 4)
      5. Stoneware
      6. 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. Liming (leather processing)
    4. Parchment (Level 4)
      1. Vellum
    5. Suede
    6. 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 51 articles.

  1. Metallurgy (Level 3)
  2. Smelting (Level 4)
    1. Blast furnace
    2. Crucible
    3. Electric arc furnace
    4. Induction furnace
  3. Steelmaking (Level 4)
    1. Bessemer process
    2. Basic oxygen steelmaking
  4. Extractive metallurgy
    1. Gold dredge
    2. Mineral processing
      1. Crusher
      2. Mechanical screening
      3. Spiral separator
      4. Stamp mill
      5. Trommel screen

Metalworking

This section contains 34 articles.

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

Textiles

This section contains 63 articles.

  1. Textile (Level 3)
    1. Carding

Fabrics and fibers

This section contains 22 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. Lace (Level 4)
  10. Linen (Level 4)
  11. Polyester (Level 4)
  12. Rayon
  13. Silk (Level 4)
  14. Spandex
  15. Thread (yarn) (Level 4)
  16. Wool (Level 4)
    1. Cashmere wool
    2. Tweed
  17. Yarn (Level 4)

Other techniques

This section contains 12 articles.

  1. Basket weaving (Level 4)
  2. Crochet (Level 4)
  3. Dyeing
    1. Dye (Level 4)
  4. Embroidery (Level 4)
  5. Knitting (Level 4)
  6. Macramé
  7. Textile printing
  8. Quilting
    1. Quilt
  9. 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 184 articles. See also Arts: Architecture

Basics

This section contains 2 articles.

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

Building materials

This section contains 41 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. Tile
  18. Wattle and daub
  19. 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 53 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 10 articles.

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

  1. Earthworks (engineering)
    1. Trench
  2. Underground power line

Fire protection

This section contains 3 articles.

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

Hydraulic infrastructure

This section contains 11 articles.

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

Transport infrastructure

This section contains 13 articles. See also #Transportation section

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

Specific infrastructure

This section contains 82 articles.

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

Dams

This section contains 26 articles.

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

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. London Bridge
  25. Mackinac Bridge
  26. Manhattan Bridge
  27. Mehmed Paša Sokolović Bridge
  28. Menai Suspension Bridge
  29. Millau Viaduct
  30. Minneapolis Skyway System
  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 5 articles.

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

Machinery and tools

This section contains 329 articles.

Machinery and tools: General

This section contains 12 articles.

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

Components and mechanisms

This section contains 74 articles.

Flexible components

This section contains 16 articles.

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

Rigid components

This section contains 10 articles.

  1. Blade
  2. Fastener (Level 4)
    1. Nail (fastener) (Level 4)
    2. Nut (hardware) (Level 4)
    3. Rivet (Level 4)
    4. Screw (Level 4)
    5. Washer (hardware)
  3. Gear (Level 4)
  4. Hook
  5. 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 38 articles.

  1. Alarm device
    1. Siren (alarm)
  2. Camshaft
  3. Locker
  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. Cam follower
      1. Tappet
    4. Hinge
    5. Rack and pinion
    6. Ratchet (device)
    7. Rod end bearing
    8. 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 13 articles.

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

Internal combustion engines

This section contains 9 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. Straight engine

Hydraulics and pneumatics

This section contains 26 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. Sink (Level 4)
    3. 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 59 articles.

Farm and garden machinery

This section contains 16 articles.

  1. Baler
  2. Chainsaw (Level 4)
  3. Combine harvester (Level 4)
  4. Corn harvester
  5. Cotton gin (Level 4)
  6. Cotton picker
  7. Cultivator (Level 4)
  8. Irrigation sprinkler (Level 4)
  9. Lawn mower (Level 4)
  10. Planter (farm implement)
  11. Reaper
  12. Reaper-binder
  13. Seed drill
  14. Swather
  15. Threshing machine
  16. 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 145 articles.

  1. Tool (Level 2)
  2. Lifting equipment
    1. Hoist (device)
    2. Jack (device)
  3. 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 15 articles.

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

Containers

This section contains 28 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. Test tube
    3. Vial
    4. Water bottle
  8. Box
    1. Cardboard box
    2. Coffin
    3. Crate
  9. Bucket
  10. Cage
  11. Envelope
  12. Intermodal container
  13. Packaging
  14. Pipette
  15. Pressure vessel
  16. Rubber band
  17. Safe
  18. Steel and tin cans
  19. Funnel

Hand tools

This section contains 26 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. Stone tool
    1. Clovis point
    2. Ground stone
    3. Hand axe
    4. Microlith
    5. Prismatic blade
  21. Wrench

Law enforcement equipment

This section contains 3 articles.

  1. Breathalyzer
  2. Physical restraint
    1. Handcuffs

Measuring instruments

This section contains 21 articles.

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

Surveying tools

This section contains 19 articles.

  1. Alidade
  2. Circumferentor
  3. Graphometer
  4. Gunter's chain
  5. Laser rangefinder
    1. Lidar
  6. Level (optical instrument)
    1. Inclinometer
      1. Topographic Abney level
    2. Level staff
    3. Plumb bob
    4. Spirit level
    5. Tiltmeter
  7. Plane table
  8. Reticle
  9. Stadimeter
  10. Surveyor's wheel
  11. 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

Media and communication

This section contains 127 articles. See also Arts: Literature; Society: Mass media; Technology: Electronics
Physical and analog media are also included here

Media and communication: Basics

This section contains 42 articles.

  1. Bulletin board
  2. Communications satellite (Level 4)
  3. Display device
    1. Cathode ray tube (Level 4)
    2. Flat-panel display (Level 4)
      1. Liquid-crystal display (Level 4)
      2. microLED
      3. OLED
      4. Plasma display
    3. Projection screen
    4. Seven-segment display
  4. Document
  5. Image (Level 4)
  6. Image scanner (Level 4)
  7. Mail (Level 3)
    1. Courier
    2. Postage stamp (Level 4)
    3. Pigeon post
  8. Portable media player
    1. iPod
    2. Walkman
  9. Sound recording and reproduction (Level 4)
    1. Loudspeaker (Level 4)
    2. Magnetic tape (Level 4)
      1. Cassette tape
    3. Phone connector (audio)
    4. Phonograph
      1. Phonograph record
    5. Headphones
    6. Microphone (Level 4)
  10. Speech synthesis (Level 4)
  11. Stationery
  12. Typewriter (Level 4)
    1. QWERTY
  13. Video (Level 4)
    1. Digital video
      1. Digital video recorder
    2. Video camera (Level 4)
    3. Videocassette recorder
    4. Videotape
      1. VHS
  14. Wireless

Printing

This section contains 24 articles.

  1. Printing (Level 3)
  2. Audiobook
  3. Book (Level 3)
    1. ISBN
  4. Blueprint
  5. Dot matrix printing
  6. Ebook
    1. E-reader
      1. Amazon Kindle
  7. Incunable
  8. Inkjet printing
  9. Laser printing
  10. Manuscript
    1. Codex
    2. Scroll (Level 4)
  11. Photocopier (Level 4)
  12. Printer (computing) (Level 4)
  13. Printing press (Level 4)
    1. Font
    2. Movable type
    3. Print on demand
    4. Typesetting
  14. Stencil
  15. Thermal printing

Telecommunications

This section contains 61 articles.

  1. Telecommunications (Level 3)
  2. Demodulation
  3. Fax
  4. Near-field communication
  5. Signal modulation (Level 4)
    1. Amplitude modulation
    2. Frequency-hopping spread spectrum
    3. Frequency modulation
    4. Frequency-shift keying
    5. Phase modulation
  6. Pager
  7. Submarine communications cable
  8. Telegraphy (Level 4)
    1. Electrical telegraph
    2. Flag semaphore
  9. Telephony
    1. Code-division multiple access
    2. Telephone (Level 3)
    3. Landline
    4. Mobile phone (Level 3)
    5. Satellite phone
    6. SIM card
  10. Text messaging (Level 4)
  11. Videotelephony
  12. Radio (Level 3)
    1. Amateur radio (Level 4)
    2. Antenna tuner
    3. Radio receiver
      1. Crystal radio
      2. Superheterodyne receiver
      3. Transistor radio
    4. Software-defined radio
    5. Transmitter
    6. Walkie-talkie
  13. Radio-frequency identification

Broadcasting

This section contains 26 articles.

  1. Broadcasting (Level 3)
  2. Radio broadcasting (Level 4)
    1. FM broadcasting
    2. AM broadcasting
    3. Shortwave radio
  3. Streaming media
  4. Television (Level 3)
    1. Analog television
      1. NTSC
      2. PAL
      3. SECAM
    2. Color television
    3. Digital television
      1. ATSC standards
      2. Digital multimedia broadcasting
      3. Digital Terrestrial Multimedia Broadcast
      4. DVB
      5. ISDB
    4. High-definition television
    5. Ultra-high-definition television
    6. Mechanical television
    7. Cable television (Level 4)
    8. Satellite television (Level 4)
    9. Streaming television
    10. Television set
    11. Terrestrial television

Medical technology

This section contains 44 articles.

Diagnostic technologies

This section contains 4 articles.

  1. DNA profiling (Level 4)
  2. Electrocardiography (Level 4)
  3. Electroencephalography
  4. Endoscopy (Level 4)

Imaging

This section contains 6 articles.

  1. Medical imaging (Level 3)
  2. CT scan
  3. Magnetic resonance imaging (Level 4)
  4. Medical ultrasound (Level 4)
  5. Positron emission tomography
  6. Radiography (Level 4)

Devices

This section contains 16 articles.

  1. Pacemaker
  2. Artificial organ (Level 4)
  3. Catheter
  4. Cervical collar
  5. Cochlear implant
  6. Dentures (Level 4)
  7. Hearing aid
  8. Orthopedic boot
  9. Orthopedic cast
  10. Prosthesis (Level 4)
  11. Reflex hammer
  12. Sling (medicine)
  13. Splint (medicine)
  14. Stethoscope (Level 4)
  15. Tourniquet
  16. Ventilator

Equipment

This section contains 7 articles.

  1. Adhesive bandage
  2. Bandage (Level 4)
  3. Dressing (medicine)
  4. Hypodermic needle
  5. Retainer (orthodontics)
  6. Stretcher
  7. Syringe (Level 4)

Mobility aids

This section contains 2 articles.

  1. Crutch
  2. Wheelchair (Level 4)

Surgical instruments

This section contains 5 articles.

  1. Forceps
  2. Scalpel
  3. Surgical suture
  4. Retractor (medicine)
  5. Tweezers

Techniques

This section contains 2 articles.

  1. Cardiopulmonary bypass (Level 4)
  2. Kidney dialysis

Transport

This section contains 2 articles.

  1. Ambulance (Level 4)
  2. Air medical services

Military technology

This section contains 308 articles.

Military technology: General

This section contains 7 articles.

  1. Weapon (Level 3)
  2. Military technology (Level 4)
  3. Booby trap
    1. Punji stick
  4. Siege engine
    1. Battering ram (Level 4)
    2. Siege tower

Countermeasures

This section contains 29 articles.

  1. Stealth technology (Level 4)
  2. Missile defense

Armour

This section contains 11 articles.

  1. Armour (Level 3)
    1. Body armor
      1. Bulletproof vest (Level 4)
      2. Chain mail (Level 4)
      3. Plate armour (Level 4)
    2. Vehicle armour
      1. Reactive armour
  2. Helmet (Level 4)
    1. Combat helmet
  3. Shield (Level 4)
    1. Scutum

Fortification

This section contains 16 articles.

  1. Fortification (Level 3)
    1. Bastion fort
      1. Glacis
      2. Ravelin
      3. Tenaille
    2. Castle (Level 4)
      1. Motte-and-bailey castle
      2. Bastion
      3. Curtain wall (fortification)
      4. Gatehouse
      5. Keep
    3. Defensive wall (Level 4)
      1. Palisade
      2. Rampart (fortification)
    4. Hillfort
    5. Moat (Level 4)

Melee weapons

This section contains 40 articles.

  1. Battle axe (Level 4)
    1. Tomahawk
  2. Brass knuckles
  3. Club (weapon) (Level 4)
    1. Baton (law enforcement)
    2. Mace (bludgeon)
    3. War hammer
  4. Flail (weapon)
    1. Nunchaku
  5. Sai (weapon)
  6. Tonfa
  7. Whip

Knives

This section contains 9 articles.

  1. Bayonet (Level 4)
  2. Knife (Level 3)
  3. Dagger (Level 4)
  4. Hunting knife
  5. Pocketknife
    1. Swiss Army knife
    2. Switchblade
  6. Throwing knife
  7. Utility knife

Polearms

This section contains 7 articles.

  1. Polearm
  2. Halberd
  3. Ji (polearm)
  4. Lance
  5. Naginata
  6. Spear (Level 4)
    1. Pike (weapon)

Swords

This section contains 12 articles.

  1. Sword (Level 4)
  2. Claymore
  3. Cutlass
  4. Dao (Chinese sword)
  5. Gladius
  6. Katana (Level 4)
  7. Longsword
  8. Macuahuitl
  9. Rapier (Level 4)
  10. Sabre
  11. Scimitar
  12. Talwar

Ranged weapons

This section contains 101 articles.

  1. Blowgun
  2. Boomerang (Level 4)
  3. Gun (Level 4)
  4. Javelin
    1. Harpoon
    2. Spear-thrower
  5. Sling (weapon) (Level 4)
  6. Slingshot

Archery

This section contains 11 articles.

  1. Bow and arrow (Level 4)
    1. Compound bow
    2. Longbow
    3. Recurve bow
  2. Arrow
    1. Arrowhead
    2. Fletching
  3. Bowstring
  4. Crossbow (Level 4)
    1. Repeating crossbow
  5. Quiver

Artillery

This section contains 13 articles.

  1. Artillery (Level 4)
  2. Cannon (Level 4)
    1. Field gun
    2. Howitzer
    3. Limbers and caissons
    4. Mortar (weapon) (Level 4)
  3. Catapult (Level 4)
    1. Ballista (Level 4)
      1. Polybolos
    2. Mangonel
    3. Onager (weapon)
    4. Trebuchet
  4. Rocket artillery

Firearms

This section contains 57 articles.

  1. Firearm (Level 3)
    1. Fire lance
    2. Hand cannon
  2. Handgun (Level 4)
    1. Revolver
    2. Pistol
  3. Long gun
    1. Arquebus
    2. Musket (Level 4)
    3. Rifle (Level 4)
      1. Assault rifle
      2. Sniper rifle
    4. Shotgun (Level 4)
    5. Submachine gun
  4. Machine gun (Level 4)
  5. Autocannon
    1. Rotary cannon
Ammunition

This section contains 14 articles.

  1. Ammunition (Level 4)
  2. Gunpowder (Level 3)
    1. Powder keg
    2. Smokeless powder
  3. Bullet
    1. Armor-piercing bullet
    2. Hollow-point bullet
    3. Tracer ammunition
  4. Flechette
  5. Cartridge (firearms)
    1. Sabot (firearms)
  6. Shotgun cartridge
    1. Shot (pellet)
  7. Shotgun slug
Mechanisms

This section contains 17 articles.

  1. Breechloader
    1. Action (firearms)
      1. Automatic firearm
      2. Bolt action
      3. Repeating firearm
      4. Select fire
      5. Semi-automatic firearm
    2. Firing pin
    3. Magazine (firearms)
  2. Gun barrel
    1. Rifling
  3. Muzzleloader
    1. Flintlock
    2. Matchlock
    3. Percussion cap
    4. Wheellock
  4. Trigger (firearms)
Specific firearms

This section contains 9 articles.

  1. AK-47
  2. Chassepot
  3. Dreyse needle gun
  4. Gatling gun
  5. Glock
  6. M134 Minigun
  7. M4 carbine
  8. M16 rifle
  9. M1911 pistol

Missiles

This section contains 12 articles.

  1. Missile (Level 4)
    1. Air-to-air missile
    2. Anti-tank guided missile
    3. Cruise missile
    4. Intercontinental ballistic missile
    5. Rocket-propelled grenade
    6. Surface-to-air missile
      1. Man-portable air-defense system
  2. Missile guidance
  3. Multiple rocket launcher
  4. V-2 rocket
  5. Warhead

Explosive weapons

This section contains 15 articles.

  1. Bomb (Level 4)
    1. Improvised explosive device (Level 4)
      1. Car bomb
    2. Detonator
    3. Fuze
      1. Contact fuze
      2. Proximity fuze
  2. Cluster munition (Level 4)
  3. Grenade (Level 4)
  4. Land mine (Level 4)
  5. Plastic explosive
  6. Shaped charge
    1. Explosively formed penetrator
    2. High-explosive anti-tank
  7. Thermobaric weapon

Incendiary weapons

This section contains 5 articles.

  1. Greek fire
  2. Flamethrower
  3. Molotov cocktail
  4. Napalm (Level 4)
  5. White phosphorus munition

Maneuver

This section contains 13 articles.

  1. Horses in warfare (Level 4)
    1. Caltrop
    2. Chariot (Level 4)
  2. Infantry fighting vehicle
    1. Armoured personnel carrier
    2. Technical (vehicle)
  3. Tank (Level 4)
    1. Main battle tank
  4. War elephant (Level 4)

Specific armor

This section contains 4 articles.

  1. M1 Abrams
  2. M4 Sherman
  3. Panzer IV
  4. T-54/T-55

Military aviation

This section contains 45 articles.

  1. Military aviation
  2. Military aircraft (Level 4)
    1. Military glider
    2. Military helicopter
  3. Attack aircraft (Level 4)
    1. Gunship
  4. Bomber (Level 4)
    1. Strategic bomber
    2. Heavy bomber
    3. Medium bomber
    4. Interdictor
    5. Penetrator (aircraft)
  5. Fighter aircraft (Level 4)
    1. Air superiority fighter
    2. Interceptor aircraft
    3. Fighter-bomber
    4. Strike fighter
  6. Electronic-warfare aircraft
  7. Maritime patrol aircraft
  8. Multirole combat aircraft
  9. Military transport aircraft
  10. Airborne early warning and control
  11. Reconnaissance aircraft
  12. Surveillance aircraft
  13. Experimental aircraft
  14. Aerial refueling

Specific aircraft

This section contains 19 articles.

  1. Boeing AH-64 Apache
  2. Boeing B-29 Superfortress
    1. Enola Gay
  3. Boeing B-52 Stratofortress
  4. Dassault Rafale
  5. Embraer EMB 314 Super Tucano
  6. Eurofighter Typhoon
  7. Fairchild Republic A-10 Thunderbolt II
  8. General Dynamics F-16 Fighting Falcon
  9. Lockheed C-130 Hercules
  10. Lockheed SR-71 Blackbird
  11. Lockheed Martin F-35 Lightning II
  12. McDonnell Douglas F-15 Eagle
  13. Mikoyan-Gurevich MiG-21
  14. Mil Mi-24
  15. North American P-51 Mustang
  16. Northrop B-2 Spirit
  17. Panavia Tornado
  18. Sikorsky UH-60 Black Hawk

This section contains 32 articles.

  1. Warship (Level 4)
    1. Aircraft carrier (Level 4)
      1. Nimitz-class aircraft carrier
    2. Battleship (Level 4)
      1. Dreadnought
      2. Iowa-class battleship
      3. Yamato-class battleship
    3. Corvette
    4. Cruiser
    5. Destroyer
      1. Arleigh Burke-class destroyer
    6. Frigate
    7. Galleon
    8. Galley (Level 4)
      1. Trireme
    9. Gunboat
    10. Ironclad warship
    11. Ship of the line (Level 4)
  2. Submarine (Level 4)
    1. Akula-class submarine
    2. Borei-class submarine
    3. Ohio-class submarine
    4. U-boat
    5. Vanguard-class submarine
  3. Boom (navigational barrier)
  4. Depth charge
  5. Naval mine (Level 4)
  6. Torpedo (Level 4)

Specific seacraft

This section contains 4 articles.

  1. CSS Virginia
  2. USS Arizona
  3. USS Constitution
  4. USS Monitor

Less-lethal weapons

This section contains 8 articles.

  1. Non-lethal weapon
  2. Baton round
  3. Sonic weapon
  4. Stun grenade
  5. Taser
  6. Tear gas
    1. Pepper spray
  7. Water cannon

Weapon of mass destruction

This section contains 13 articles.

  1. Weapon of mass destruction (Level 4)
  2. Biological warfare (Level 4)
    1. Entomological warfare
  3. Chemical weapon (Level 4)
    1. Blister agent
    2. Blood agent
    3. Nerve agent
  4. Dirty bomb
  5. Nuclear weapon (Level 4)
    1. Thermonuclear weapon (Level 4)
      1. Tsar Bomba
    2. Nuclear weapon design
    3. Nuclear proliferation

This section contains 84 articles. For units of time (hour, day, etc.), see Physical sciences – Measurement. For maps and cartography, see Geography – Physical geography.

This section contains 20 articles.

  1. Navigation (Level 3)
  2. Compass (Level 3)
    1. Compass rose
  3. Celestial navigation (Level 4)
    1. Backstaff
    2. Jacob's staff
    3. Octant (instrument)
    4. Quadrant (instrument)
    5. Sextant (Level 4)
  4. Dead reckoning (Level 4)
  5. Gyroscope (Level 4)
  6. Piloting
  7. Satellite navigation (Level 4)
    1. BeiDou
    2. Galileo (satellite navigation)
    3. Global Positioning System (Level 4)
    4. GLONASS
    5. Satellite navigation device
  8. Radar (Level 3)
  9. Sonar

Timekeeping

This section contains 64 articles.

  1. Astronomical year numbering
  2. Calendar (Level 3)
  3. Clock (Level 3)
  4. Leap year (Level 4)
  5. Leap second
  6. Future (Level 4)
  7. Present
  8. Past (Level 4)
  9. Standard time
  10. Timeline
  11. Time standard
    1. Coordinated Universal Time (Level 4)
    2. Greenwich Mean Time
    3. International Atomic Time
  12. Time zone (Level 4)
    1. Daylight saving time (Level 4)

Calendars

This section contains 12 articles.

  1. Solar calendar
    1. Gregorian calendar (Level 4)
      1. Anno Domini
      2. Common Era
    2. Julian calendar (Level 4)
  2. Lunisolar calendar
    1. Buddhist calendar
    2. Chinese calendar (Level 4)
    3. Hindu calendar
  3. Lunar calendar
    1. Hebrew calendar
    2. Islamic calendar (Level 4)

Clocks

This section contains 16 articles.

  1. 12-hour clock
  2. 24-hour clock
  3. Alarm clock
  4. Atomic clock (Level 4)
  5. Digital clock
  6. Clock face
  7. Hourglass
  8. Marine chronometer
  9. Pendulum clock
    1. Pendulum (Level 4)
  10. Quartz clock
  11. Sundial (Level 4)
  12. Watch (Level 4)
    1. Pocket watch
    2. Stopwatch
  13. Water clock

Months

This section contains 12 articles.

  1. January
  2. February
  3. March
  4. April
  5. May
  6. June
  7. July
  8. August
  9. September
  10. October
  11. November
  12. December

Days of the week

This section contains 8 articles.

  1. Names of the days of the week
  2. Monday
  3. Tuesday
  4. Wednesday
  5. Thursday
  6. Friday
  7. Saturday
  8. Sunday

Optical technology

This section contains 62 articles.

Optical components

This section contains 15 articles.

  1. Lens (Level 3)
    1. Fresnel lens
    2. Thin lens
  2. Collimator
  3. Diffraction grating (Level 4)
  4. Mirror (Level 4)
    1. One-way mirror
  5. Optical coating
    1. Anti-reflective coating (Level 4)
  6. Optical fiber (Level 4)
  7. Optical filter
  8. Optical isolator
  9. Polarizer (Level 4)
  10. Prism (optics) (Level 4)
    1. Pentaprism

Optical instruments

This section contains 17 articles.

  1. Autocollimator
  2. Binoculars (Level 4)
  3. Glasses (Level 4)
    1. Bifocals
    2. Contact lens
  4. Interferometry (Level 4)
  5. Loupe
  6. Magnifying glass
  7. Microscope (Level 3)
    1. Electron microscope (Level 4)
      1. Scanning electron microscope
      2. Transmission electron microscopy
      3. Scanning tunneling microscope
    2. Optical microscope (Level 4)
  8. Periscope
  9. Projector
    1. Magic lantern

Lasers

This section contains 9 articles.

  1. Laser (Level 3)
    1. Solid-state laser
      1. Ruby laser
      2. Nd:YAG laser
    2. Dye laser
    3. Gas laser
      1. Carbon-dioxide laser
      2. Helium–neon laser
  2. Maser

Photography

This section contains 21 articles.

  1. Camera (Level 3)
    1. Hidden camera
    2. Instant camera
    3. Rangefinder camera
    4. Single-lens reflex camera
      1. Digital single-lens reflex camera
    5. Twin-lens reflex camera
    6. Closed-circuit television
  2. Holography (Level 4)
  3. Photographic film (Level 4)
    1. Photographic plate
  4. Photography (Level 3)
    1. Digital photography (Level 4)
    2. Fine-art photography (Level 4)
    3. Landscape photography
    4. Portrait photography
    5. Street photography
    6. Exposure (photography)
      1. Shutter speed
    7. Flash (photography)
    8. Multi-exposure HDR capture

Astronomical technology

This section contains 73 articles.

  1. Astronomical catalogue
  2. Ephemeris
  3. Star chart
  4. Astronomical Almanac

Telescope

This section contains 26 articles.

  1. Telescope (Level 3)
  2. Reflecting telescope
    1. Cassegrain reflector
    2. Dobsonian telescope
    3. Gregorian telescope
    4. Newtonian telescope
    5. Ritchey–Chrétien telescope
    6. Schmidt–Cassegrain telescope
  3. Refracting telescope
  4. X-ray telescope
  5. Optical telescope (Level 4)
  6. Infrared telescope
  7. Radio telescope (Level 4)
  8. Solar telescope
  9. Space telescope
  10. Astronomical interferometer
    1. Aperture synthesis
  11. Telescope mount
    1. Altazimuth mount
    2. Equatorial mount
  12. Active optics
  13. Adaptive optics
  14. Eyepiece
  15. Astronomical filter
  16. Primary mirror
  17. Gravitational-wave observatory

Specific observatories

This section contains 43 articles.

Space-based observatories

This section contains 17 articles.

  1. Hubble Space Telescope (Level 4)
  2. Spitzer Space Telescope
  3. Herschel Space Observatory
  4. INTEGRAL
  5. Fermi Gamma-ray Space Telescope
  6. James Webb Space Telescope
  7. Wide-field Infrared Survey Explorer
  8. IRAS
  9. Chandra X-ray Observatory
  10. Kepler
  11. GALEX
  12. Hipparcos
  13. Gaia (spacecraft)
  14. XMM-Newton
  15. ROSAT
  16. Cosmic Background Explorer
  17. Wilkinson Microwave Anisotropy Probe

Ground-based observatories

This section contains 26 articles.

  1. Atacama Large Millimeter Array (Level 4)
  2. Mauna Kea Observatories (Level 4)
    1. Subaru Telescope
    2. Thirty Meter Telescope
    3. W. M. Keck Observatory
  3. Gemini Observatory
  4. Five-hundred-meter Aperture Spherical Telescope
  5. LIGO
  6. Virgo interferometer
  7. IceCube Neutrino Observatory
  8. Very Large Telescope
  9. Large Binocular Telescope
  10. Mount Wilson Observatory
  11. Very Large Array
  12. Very Long Baseline Array
  13. Arecibo Observatory
  14. Green Bank Telescope
  15. Effelsberg 100-m Radio Telescope
  16. Low-Frequency Array
  17. MeerKAT
  18. Square Kilometre Array
  19. Extremely Large Telescope
  20. Giant Magellan Telescope
  21. Wise Observatory
  22. South Pole Telescope
  23. Jodrell Bank Observatory

Space

This section contains 73 articles.

Basics

This section contains 20 articles.

  1. Spaceflight (Level 3)
    1. Sub-orbital spaceflight
    2. Orbital spaceflight
    3. Artificial gravity
  2. Spacecraft (Level 4)
  3. Rocket (Level 3)
    1. Launch pad
    2. Launch vehicle (Level 4)
    3. Rocket engine (Level 4)
  4. Satellite (Level 3)
  5. Space station (Level 4)
  6. Astronaut (Level 4)
    1. Space suit
  7. Space capsule
  8. Uncrewed spacecraft
  9. Interstellar travel
  10. Space colonization
  11. Space settlement
  12. Space industry
  13. Asteroid mining

Programs and launch sites

This section contains 17 articles.

  1. NASA (Level 4)
    1. Apollo program (Level 4)
    2. Kennedy Space Center (Level 4)
    3. Project Gemini
    4. Project Mercury
  2. Soviet space program (Level 4)
    1. Baikonur Cosmodrome (Level 4)
    2. Vostok programme
    3. Voskhod programme
    4. Soyuz programme
  3. Roscosmos (Level 4)
  4. European Space Agency (Level 4)
  5. China National Space Administration (Level 4)
    1. Chinese Lunar Exploration Program
  6. ISRO
  7. Israel Space Agency
  8. JAXA

Crewed vehicles

This section contains 10 articles.

  1. Apollo 11 (Level 4)
  2. International Space Station (Level 4)
  3. Mir (Level 4)
  4. Salyut 1
  5. Space Shuttle (Level 4)
  6. Saturn V (Level 4)
  7. Soyuz (spacecraft) (Level 4)
  8. Skylab
  9. Tiangong space station
  10. Vostok 1

Unmanned spacecraft

This section contains 17 articles.

  1. Sputnik 1 (Level 4)
  2. Sputnik 2
  3. Luna 2
  4. Luna 3
  5. Mariner 2
  6. Luna 9
  7. Voyager program (Level 4)
    1. Voyager 1
    2. Voyager 2
    3. Voyager Golden Record
  8. Pioneer program
    1. Pioneer 10
    2. Pioneer 11
  9. New Horizons
  10. Galileo project
  11. Cassini–Huygens
  12. MESSENGER

Rovers

This section contains 9 articles.

  1. Rover (space exploration)
  2. Mars rover
    1. Perseverance (rover)
    2. Curiosity (rover)
    3. Spirit (rover)
    4. Opportunity (rover)
    5. Sojourner (rover)
  3. Lunar rover
    1. Lunokhod 1

Transportation

This section contains 468 articles.

Basics

This section contains 22 articles.

  1. Transport (Level 2)
    1. Public transport (Level 4)
    2. Private transport
  2. Travel (Level 4)
  3. Airbag
  4. Passenger
    1. Intermodal passenger transport
  5. Freight transport (Level 4)
    1. Cargo (Level 4)
  6. Induced demand
  7. Lifebuoy
  8. Personal flotation device
  9. Seat belt
  10. Traffic
    1. Traffic collision (Level 4)
    2. Traffic congestion
  11. Vehicle (Level 3)
    1. Motor vehicle
    2. Alternative fuel vehicle
    3. Electric vehicle
    4. Battery electric vehicle
    5. Hybrid vehicle

Ground transport

This section contains 172 articles.

Concepts of ground transport

This section contains 22 articles.

  1. Land transport (Level 4)
    1. Road transport (Level 4)
  2. Breakdown (vehicle)
  3. Charging station
  4. Driving (Level 4)
  5. Filling station (Level 4)
  6. Parking (Level 4)
    1. Parking lot
  7. Service (motor vehicle)
    1. Automobile repair shop
    2. Bus garage
    3. Car wash
    4. Rail yard
  8. Rest area
  9. Tire (Level 4)
  10. Transport hub
    1. Bus station
    2. Bus stop
    3. Train station (Level 4)
      1. Goods station
      2. Railway platform
    4. Park and ride

Road infrastructure

This section contains 26 articles. For bridges and tunnels, see transport infrastructure in #Infrastructure section.

  1. Road (Level 3)
  2. Avenue (landscape)
  3. Boulevard
  4. Dirt road
  5. Highway (Level 4)
    1. Controlled-access highway (Level 4)
  6. Road junction
    1. Interchange (road)
      1. Stack interchange
    2. Intersection (road)
      1. Traffic light
      2. Traffic sign
  7. Scenic route
  8. Toll road
  9. Footpath
  10. Pedestrian crossing
  11. Pedestrian zone
  12. Sidewalk
  13. Trail (Level 4)
  14. Cycling infrastructure
    1. Bicycle boulevard
    2. Bike lane
    3. Bicycle parking rack
    4. Shared-use path
    5. Bicycle-sharing system
    6. Cycle track

Motorized road transport

This section contains 56 articles.

  1. Auto rickshaw
  2. Bus (Level 4)
    1. Articulated bus
    2. Bus rapid transit
    3. Coach (bus)
    4. Double-decker bus
    5. Intercity bus service
    6. Minibus
    7. Public transport bus service
    8. School bus
    9. Trolleybus
  3. Car (Level 3)
    1. Convertible
    2. Coupe
    3. Electric car
    4. Grand tourer
    5. Hatchback
    6. Limousine
    7. Luxury car
    8. Muscle car
    9. Sedan (automobile)
    10. Self-driving car
    11. Sports car
    12. Station wagon
    13. Supercar
    14. T-top
  4. Disc brake
  5. Motorcycle (Level 4)
    1. Chopper (motorcycle)
    2. Minibike
    3. Moped
    4. Scooter (motorcycle)
      1. Motorized scooter
      2. Scooter-sharing system
    5. Sport bike
  6. Off-road vehicle
    1. All-terrain vehicle
    2. Dune buggy
    3. Snowmobile
  7. Recreational vehicle
  8. Shared transport
    1. Carpool
    2. Demand-responsive transport
  9. Trailer (vehicle)
  10. Truck (Level 4)
    1. Flatbed truck
    2. Monster truck
    3. Pickup truck
    4. Semi-trailer truck
    5. SUV
  11. Van (Level 4)
    1. Minivan
  12. Vehicle for hire
    1. Motorcycle taxi
    2. Share taxi
    3. Taxi (Level 4)

Rail and cable transport

This section contains 30 articles.

  1. Rail transport (Level 4)
    1. Inter-city rail
    2. Railway track (Level 4)
      1. Elevated railway
    3. Railway electrification
  2. Train (Level 3)
    1. Locomotive (Level 4)
      1. Electric locomotive
      2. Diesel locomotive
      3. Steam locomotive (Level 4)
    2. Railroad car
    3. Rolling stock
    4. Passenger train
      1. Commuter rail
    5. Rail freight transport
    6. Freight train
  3. Cable transport (Level 4)
    1. Aerial tramway
    2. Cable car (railway)
    3. Funicular
    4. Gondola lift
    5. Ski lift
  4. High-speed rail (Level 4)
    1. Maglev
  5. Tram (Level 4)
    1. Interurban
    2. Light rail
  6. Rapid transit (Level 4)
    1. Medium-capacity rail system
    2. Monorail (Level 4)

Animal-powered transport

This section contains 7 articles.

  1. Carriage (Level 4)
  2. Cart (Level 4)
  3. Horsecar
  4. Saddle (Level 4)
  5. Stirrup
  6. Stagecoach
  7. Wagon

Human-powered transport

This section contains 15 articles.

  1. Bicycle (Level 3)
    1. Bicycle brake
    2. Bicycle gearing
    3. Derailleur
    4. Shifter (bicycle part)
    5. Electric bicycle
    6. Mountain bike
    7. Penny-farthing
    8. Recumbent bicycle
    9. Tandem bicycle
  2. Handcar
  3. Kick scooter
  4. Rickshaw (Level 4)
  5. Tricycle
  6. Unicycle

Specific-purpose transportation

This section contains 12 articles. For medical transport, see Medical section

  1. Baby transport
  2. Fire engine
  3. Paratransit
  4. Pipeline (Level 4)
  5. Police car
  6. Heavy equipment
    1. Bulldozer
    2. Dump truck
    3. Excavator
    4. Road roller
      1. Steamroller
    5. Tractor (Level 4)

Specific automobiles

This section contains 4 articles.

  1. Ford Model T
  2. Ford Mustang
  3. Toyota Corolla
  4. Volkswagen Beetle

This section contains 67 articles. For military watercraft, see Military technology. For pier and port, see coastal infrastructure.

  1. Maritime transport (Level 4)
  2. Ship (Level 3)
    1. Anchor
  3. Watercraft
  4. Buoy
  5. Canal (Level 3)
    1. Lock (water navigation) (Level 4)
  6. Barge (Level 4)
  7. Boat (Level 4)
  8. Canoe (Level 4)
  9. Cargo ship (Level 4)
    1. Container ship
  10. Ferry (Level 4)
  11. Fishing vessel (Level 4)
  12. Hospital ship
  13. Hovercraft (Level 4)
  14. Hydrofoil
  15. Icebreaker
  16. Inflatable boat
  17. Kayak
  18. Lifeboat (rescue)
  19. Merchant ship (Level 4)
  20. Motor ship
  21. Motorboat
  22. Multihull
    1. Catamaran
  23. Naval architecture
  24. Outrigger
  25. Passenger ship (Level 4)
    1. Cruise ship
    2. Ocean liner
  26. Jet ski
  27. Raft
  28. Riverboat (Level 4)
  29. Sail (Level 4)
  30. Sailboat
    1. Schooner
    2. Sloop
  31. Sailing ship (Level 4)
    1. Caravel
    2. Clipper
    3. Junk (ship)
  32. Sailing (Level 4)
  33. Shipbuilding (Level 4)
  34. Steamboat
  35. Steamship (Level 4)
    1. Paddle steamer
  36. Submersible
    1. Diving bell
    2. Remotely operated underwater vehicle
  37. Tanker (ship) (Level 4)
    1. Oil tanker
  38. Tugboat
  39. Yacht

Specific piers and ports

This section contains 13 articles.

  1. Port of Singapore
  2. Port of Ningbo-Zhoushan
  3. Port of Busan
  4. Port of Rotterdam
  5. Port of Jebel Ali
  6. Port of Los Angeles
  7. Port of New York and New Jersey
  8. Port of Port Hedland
  9. Port of Yokohama
  10. Port of Kobe
  11. Port of Hamburg
  12. PortMiami
  13. Port of Barcelona

Aviation

This section contains 99 articles.

Concepts of aviation

This section contains 13 articles.

  1. Aviation (Level 4)
  2. Aeronautics
  3. Aircraft (Level 3)
  4. Airline (Level 4)
  5. Airport (Level 4)
    1. Airport terminal
    2. Helipad
    3. Runway
  6. Air traffic control (Level 4)
  7. Civil aviation
    1. General aviation
    2. Parachute (Level 4)
  8. Environmental impact of aviation

Types of aircraft

This section contains 23 articles.

  1. Aerostat
    1. Balloon (aeronautics) (Level 4)
      1. Hot air balloon (Level 4)
      2. Gas balloon
    2. Airship (Level 4)
      1. Blimp
      2. Rigid airship
        1. Zeppelin
      3. Semi-rigid airship
  2. Fixed-wing aircraft (Level 4)
    1. Airplane (Level 4)
      1. Airliner
    2. Biplane
    3. Cargo aircraft
    4. Glider (aircraft) (Level 4)
    5. Jet aircraft (Level 4)
    6. Monoplane
    7. Supersonic aircraft
    8. Seaplane
    9. Ultralight aviation
  3. Rotorcraft
    1. Helicopter (Level 4)
  4. Unmanned aerial vehicle (Level 4)

Aircraft components

This section contains 43 articles.

  1. Aircraft engine (Level 4)
    1. Auxiliary power unit
    2. Jet engine (Level 4)
      1. Turbofan
      2. Turbojet
    3. Radial engine
    4. Turboprop
    5. Turboshaft
    6. Thrust reversal
  2. Aircraft flight control system
    1. Fly-by-wire
  3. Airframe
    1. Aircraft fairing
    2. Empennage
    3. Fuselage
    4. Landing gear
    5. Wing (Level 4)
      1. Airfoil
      2. Wingtip device
  4. Avionics
    1. ACARS
    2. Airborne collision avoidance system
    3. ARINC 429
    4. Autopilot
    5. FADEC
    6. Flight management system
    7. Flight recorder
    8. Future Air Navigation System
    9. Health and usage monitoring systems
    10. Integrated modular avionics
  5. Cockpit
    1. Flight instruments
    2. Glass cockpit
  6. Flight control surfaces
    1. Aileron
    2. Air brake (aeronautics)
    3. Elevator (aeronautics)
    4. Flap (aeronautics)
    5. Leading-edge slat
    6. Spoiler (aeronautics)
    7. Stabilizer (aeronautics)
    8. Trim tab
  7. Line-replaceable unit

Specific aircraft

This section contains 20 articles. For military aircraft, see Military technology

  1. Airbus A300
  2. Airbus A320 family
  3. Airbus A380
  4. Antonov An-225 Mriya
  5. Boeing 707
  6. Boeing 737
  7. Boeing 747
  8. Boeing 777
  9. De Havilland Canada Dash 8
  10. Cessna 172
  11. Concorde
  12. de Havilland Comet
  13. Douglas DC-3
  14. Embraer E-Jet family
  15. Ilyushin Il-76
  16. Lockheed Constellation
  17. McDonnell Douglas DC-9
  18. Mil Mi-8
  19. Tupolev Tu-154
  20. Wright Flyer

Specific transportation systems

This section contains 108 articles.

Ground transportation networks

This section contains 17 articles. See Geography/Physical for Maritime transportation network. See Society/Politic and economic for companies that operate transportation networks.

  1. Intercontinental and transoceanic fixed links
  2. Arab Mashreq International Road Network
  3. Asian Highway Network
  4. Autobahn
  5. Camino de Santiago
  6. Inca road system
  7. Interstate Highway System
  8. Roman roads
    1. Appian Way
  9. Pan-American Highway
  10. Trans-African Highway network
  11. Trans-European Transport Network
    1. Trans-European high-speed rail network
  12. EuroVelo
  13. European long-distance paths
  14. Transcontinental railroad
  15. U.S. Route 66

Rapid transit

This section contains 63 articles.

Africa

This section contains 1 article.

  1. Cairo Metro
Americas

This section contains 12 articles.

  1. Caracas Metro
  2. Mexico City Metro
  3. Santiago Metro
Brazil

This section contains 2 articles.

  1. Rio de Janeiro Metro
  2. São Paulo Metro
Canada

This section contains 3 articles.

  1. Montreal Metro
  2. Toronto subway
  3. SkyTrain (Vancouver)
United States

This section contains 4 articles.

  1. Chicago Transit Authority
  2. Massachusetts Bay Transportation Authority
  3. New York City Subway (Level 4)
  4. Washington Metropolitan Area Transit Authority
Asia

This section contains 24 articles.

  1. Dubai Metro
  2. Transjakarta
  3. Mass Rapid Transit (Singapore)
  4. Taipei Metro
  5. Tehran Metro
China

This section contains 6 articles.

  1. Beijing Subway
  2. Chongqing Rail Transit
  3. Guangzhou Metro
  4. MTR
  5. Shanghai Metro
  6. Shenzhen Metro
India

This section contains 5 articles.

  1. Delhi Metro
  2. Hyderabad Metro
  3. Kolkata Metro
  4. Mumbai Metro
  5. Namma Metro
Japan

This section contains 6 articles.

  1. Hiroshima Electric Railway
  2. Nagoya Municipal Subway
  3. Osaka Metro
  4. Sapporo Municipal Subway
  5. Toei Subway
  6. Tokyo Metro
South Korea

This section contains 2 articles.

  1. Busan Metro
  2. Seoul Metropolitan Subway
Europe

This section contains 26 articles.

  1. Athens Metro
  2. Brussels Metro
  3. Budapest Metro
  4. Istanbul Metro
  5. Kyiv Metro
  6. Prague Metro
  7. Vienna U-Bahn
France

This section contains 3 articles.

  1. Lyon Metro
  2. Paris Métro
  3. Réseau Express Régional
Germany

This section contains 3 articles.

  1. Berlin U-Bahn
  2. Munich U-Bahn
  3. S-Bahn
Italy

This section contains 2 articles.

  1. Milan Metro
  2. Rome Metro
Netherlands

This section contains 2 articles.

  1. Amsterdam Metro
  2. Rotterdam Metro
Russia

This section contains 2 articles.

  1. Moscow Metro
  2. Saint Petersburg Metro
Scandinavia

This section contains 4 articles.

  1. Copenhagen Metro
  2. Helsinki Metro
  3. Oslo Metro
  4. Stockholm Metro
Spain

This section contains 2 articles.

  1. Barcelona Metro
  2. Madrid Metro
United Kingdom

This section contains 1 article.

  1. London Underground (Level 4)

High-speed rail

This section contains 10 articles.

  1. AVE
  2. China Railway High-speed
  3. Eurostar
  4. Frecciarossa
  5. Intercity Express
  6. KTX
  7. Shinkansen (Level 4)
  8. Taiwan High Speed Rail
  9. TGV
  10. Sapsan

Railway lines

This section contains 5 articles.

  1. Trans-Australian Railway
  2. Chinese Eastern Railway
  3. Trans-Mongolian Railway
  4. Trans-Siberian Railway (Level 4)
  5. Union Pacific Railroad

Railway services

This section contains 1 article.

  1. Orient Express

Airports

This section contains 12 articles.

Asia

This section contains 6 articles.

  1. Beijing Capital International Airport
  2. Dubai International Airport
  3. Haneda Airport
  4. Hong Kong International Airport
  5. Indira Gandhi International Airport
  6. Shanghai Pudong International Airport
Europe

This section contains 3 articles.

  1. Charles de Gaulle Airport
  2. Heathrow Airport
  3. Sheremetyevo International Airport
North America

This section contains 3 articles.

  1. Hartsfield–Jackson Atlanta International Airport
  2. John F. Kennedy International Airport
  3. Los Angeles International Airport


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