Gumaramit:JinJian/test1

Astrometry, 107

1. Angular resolution
2. Cosmic distance ladder
3. Photometry (astronomy)

Celestial sphere, 102

1. 1. Declination
   2. Right ascension
2. Celestial equator
3. Celestial sphere
4. Ecliptic

Celestial mechanics, 19

1. Celestial mechanics
2. Ephemeris
3. Epoch (astronomy)
4. Escape velocity
5. Gravity assist
6. Kepler's laws of planetary motion
7. Lagrangian point
   1. Geostationary orbit
   2. Low Earth orbit
8. Orbital elements
9. Orbital eccentricity
10. Orbital mechanics
11. Occultation
12. Two-body problem

Galactic astronomy and Extragalactic astronomy, 29

Basics, 13

1. 1. Schwarzschild radius
   2. Supermassive black hole
2. Cosmic ray
3. Galaxy groups and clusters
   1. Supercluster
4. Great Attractor
5. Interstellar medium
6. Molecular cloud
7. Stellar association

Galaxy morphological classification, 6

1. Galaxy morphological classification
2. Dwarf galaxy
3. Elliptical galaxy
4. Irregular galaxy
5. Lenticular galaxy
6. Spiral galaxy

Active galactic nucleus, 6

1. Active galactic nucleus
2. Blazar
3. Quasar
4. Radio galaxy
5. Seyfert galaxy
6. Starburst galaxy

Physical cosmology, 13

1. Cosmic microwave background radiation
2. Dark energy
3. Dark matter
4. Formation and evolution of the Solar System
5. Galaxy formation and evolution
6. Hubble's law
7. Nebular hypothesis
8. Redshift
   1. Observable universe

Stellar astronomy, 27

1. Brown dwarf
2. Gamma-ray burst
3. Hertzsprung–Russell diagram
4. Metallicity
5. Stellar classification
   1. Planetary nebula
   2. Star formation
   3. Main sequence
   4. Compact star
      1. White dwarf
      2. Neutron star
      3. Stellar black hole
6. Stellar kinematics
7. Stellar magnetic field
8. Stellar nucleosynthesis
9. Stellar rotation
10. star system
    1. Circumstellar disk
11. Variable star
    1. Cepheid variable
    2. Pulsar

Chemistry, 278

Basics, 47

1. Electrochemistry
2. Medicinal chemistry
3. Nuclear chemistry
   1. Table of nuclides
4. Organometallic chemistry
5. Photochemistry
6. Polymer chemistry
7. Chemical bond
   1. Ionic bond
   2. Covalent bond
   3. Metallic bond
   4. Hydrogen bond
   5. Intermolecular force
8. Chemical reaction
   1. Acid–base reaction
   2. Catalysis
   3. Chemical equation
   4. Chemical equilibrium
   5. Chemical formula
   6. Chemical kinetics
   7. Salt metathesis reaction
   8. Reaction mechanism
   9. Redox
   10. Substitution reaction
9. Chemical substance
10. Chemical synthesis
11. Conservation of mass
12. Pyrotecnics
13. Fireworks

Analytical chemistry, 5

1. Chromatography
2. Spectroscopy
   1. Absorption spectroscopy
   2. Gas chromatography–mass spectrometry

Chemical substances, 226

1. 1. Clay
   2. Polymer
   3. Gypsum
   4. Silicate
2. Graphite

Chemical mixtures, 18

1. Mixture
2. Aerosol
3. Colloid
4. Dispersion (chemistry)
5. Emulsion
6. Foam
7. Gel
8. Solution
9. Suspension (chemistry)
10. Vapor

Alloys, 8

1. Amalgam (chemistry)
2. Brass
3. Cast iron
4. Duralumin

Earth science, 218

Earth, 121

1. Structure of the Earth

Geology, 21

1. Fold (geology)
2. Formation (stratigraphy)
3. Geological unit
4. Lithosphere
   1. Crust (geology)
   2. Fault (geology)
      1. Basalt
      2. Flint
      3. Igneous rock
      4. Limestone
      5. Metamorphic rock
      6. Sedimentary rock
5. Stratigraphy
6. Stratum
7. Thrust fault

Geophysics, 7

1. Earth's magnetic field
2. Inner core
3. Outer core
4. Mantle (geology)

Geomorphology, 62

1. Butte
2. Escarpment
3. Mesa
4. Promontory
5. Stack (geology)
6. Weathering

Landforms, 54

1. Landform
2. Valley

Fluvial landforms, 9

1. Alluvial fan
2. Canyon
3. Meander
4. Rapid

Glacial landforms, 3

1. Cirque
2. Esker
3. Fjord

Karst, 3

1. Karst

Oceanic and coastal landforms, 11

1. Atoll
2. Continental shelf
3. Coral reef
4. Lagoon
5. Oceanic trench
6. List of isthmuses
7. Seamount

Volcanic landforms, 10

1. Caldera
2. Geyser
3. Hotspot (geology)
4. Mid-ocean ridge
5. Volcanic crater
6. Volcanic plug
7. Lava dome
8. Submarine volcano

Aeolian landforms, 3

1. Aeolian processes
2. Dry lake
3. Dune

Artificial landforms, 8

1. Reservoir
2. Polder
3. Artificial island
4. Levee
5. Quarry
6. Ditch
7. Land reclamation

Biomes, 24

1. Tundra
2. Heath

Forests, 7

1. Jungle
2. Mangrove
3. Taiga
   1. Tropical rainforest
4. Temperate broadleaf and mixed forest

Grasslands, 10

1. Cerrado
2. Llanos
3. Meadow
4. Pampas
5. Pasture
6. Prairie
7. Savanna
8. Steppe

Wetlands, 4

1. Wetland
2. Marsh
3. Bog

Air, 63

Atmosphere, 4

1. Atmospheric chemistry
2. Air mass
3. Atmospheric pressure

Atmospheric optics, 5

1. Aurora (astronomy)
2. Halo (optical phenomenon)
3. Mirage
4. Sky

Climatology, 8

1. Global climate model
2. Köppen climate classification
3. Temperateness
4. Tropical climate

Meteorology, 46

1. Humidity
2. Weather front

Clouds, 5

1. Cirrus cloud
2. Cumulonimbus cloud
3. Cumulus cloud

Precipitations, 8

1. Precipitation (meteorology)
2. Black ice
3. Dew
4. Frost
5. Hail

Seasons, 7

1. Season

Atmospheric circulation, 21

1. Atmospheric circulation
2. Anticyclone
3. Cyclone
4. Extratropical cyclone
5. Hadley cell
6. Polar vortex
7. Walker circulation

Storm, 8

1. Storm
2. Blizzard
3. Dust storm
4. Saffir–Simpson hurricane scale
5. Thunderstorm
6. Tropical cyclone

Winds, 6

1. Beaufort scale
2. Jet stream
3. Monsoon
4. Sea breeze
5. Trade wind

Water, 28

1. Hydrosphere
2. Cryosphere

Glaciology, 9

1. Firn
2. Glacier
3. Ice sheet
4. Ice shelf
5. Iceberg
6. Sea ice
7. Permafrost

Hydrology, 10

1. Water cycle
2. Hydrological transport model
3. Estuary
4. Pond

Oceanography, 7

1. Ocean current
2. Physical oceanography
3. Thermohaline circulation

Physics, 270

1. Allotropy
2. Geiger–Marsden experiment
3. Osmosis
4. Quantum field theory

Fundamental physics concepts, 17

1. Amplitude
   1. Mass–energy equivalence
2. Power (physics)
3. Radiation
   1. Ionizing radiation
   2. Planck time

Atomic, molecular, and optical physics, 32

Atomic physics, 20

1. Atomic physics
2. Atomic orbital
3. Atomic spectral line
4. Auger effect
5. Binding energy
6. Bohr model
7. Bremsstrahlung
8. Electron configuration
9. Electron magnetic dipole moment
10. Electron shell
11. Excited state
12. Hydrogen-like atom
13. Hyperfine structure
14. Plum pudding model
15. Principal quantum number
16. Relativistic quantum chemistry
17. Stimulated emission

Molecular physics, 2

1. Molecular orbital
2. Molecular orbital theory

Optics, 10

1. Free-electron laser
2. Kerr effect
3. Luminosity
4. Nonlinear optics
5. Optical physics
6. Photonics
7. Physical optics
8. Polarization (waves)
9. Refractive index
10. X-ray optics

Condensed matter physics, 30

1. Condensed matter physics
2. Amorphous solid
3. Solid-state physics

Crystallography, 5

1. Crystallography
2. Crystal structure
3. Crystal system
4. Crystallization

Phase transitions, 13

1. Phase transition
2. Phase (matter)
3. Critical point (thermodynamics)
4. Condensation
5. Evaporation
6. Ionization
7. Sublimation (phase transition)
8. Triple point

States of matter, 9

1. State of matter
2. Bose–Einstein condensate
3. Degenerate matter
4. Quark–gluon plasma
5. Superfluidity

Electromagnetism, 44

1. Dielectric
2. Oil drop experiment
3. Metamaterial
4. Photoelectric effect

Electrostatics, 6

1. Electrostatics
2. Electric charge
3. Coulomb's law
4. Electric field
5. Gauss's law
6. Electric potential

Electrodynamics, 17

1. Lorentz force
2. Electromotive force
3. Magnetomotive force
4. Electromagnetic induction
5. Faraday's law of induction
6. Maxwell's equations
7. Electromagnetic field
   1. Radio waves
   2. Microwave
   3. Visible spectrum
8. Eddy current

Magnetostatics, 5

1. Magnetostatics
2. Ampère's circuital law
3. Magnetic moment

Electrical circuits, 8

1. Electrical network
2. Electrical resistivity and conductivity
3. Electrical resistance and conductance
4. Gain
5. Capacitance
6. Inductance
7. Electrical impedance
8. Electrical reactance

Mechanics, 62

1. 1. Aerodynamics
   2. Continuum mechanics
   3. Dynamics (mechanics)
   4. Kinematics
   5. Soil mechanics
   6. Statics
   7. Rheology
2. Oscillation

Classical mechanics, 24

1. Frame of reference
2. Friction
3. Impulse (physics)
4. Inertia
5. Kinetic energy
6. Moment of inertia
7. Momentum
8. Motion (physics)
   1. Newton's laws of motion
9. Potential energy
10. Rotation
    1. Angular momentum
    2. Centrifugal force
    3. Centripetal force
    4. Coriolis effect
11. Newton's law of universal gravitation
12. Torque
13. Work (physics)

Solid mechanics, 9

1. Solid mechanics
2. Deformation (engineering)
3. Fatigue (material)
4. Elasticity (physics)
5. Hooke's law
6. Plasticity (physics)
7. Strength of materials
8. Stress (mechanics)

Fluid mechanics, 12

1. Bernoulli's principle
2. Buoyancy
3. Convection
4. Diffusion
5. Fluid statics
6. Navier–Stokes equations
7. Reynolds number
8. Surface tension
9. Turbulence
10. Viscosity

Quantum mechanics, 7

1. 1. Quantum chromodynamics
2. Uncertainty principle
3. Pauli exclusion principle
4. Schrödinger equation
5. Wave–particle duality

Statistical mechanics, 1

1. Statistical mechanics

Particle physics, 42

1. Particle physics
2. Cloud chamber
3. String theory
4. Spontaneous symmetry breaking
5. Particle accelerator
   1. Synchrotron
   2. Synchrotron radiation
   3. Tevatron

Subatomic particles, 32

1. Subatomic particle

Antimatter, 5

1. Antimatter
2. Antihydrogen
3. Antiproton
4. Antineutron

Theory of relativity, 5

1. Length contraction
2. Michelson–Morley experiment

Thermodynamics, 10

1. Enthalpy
2. Entropy
3. Ideal gas law
4. Functions of state
5. Thermodynamic free energy
6. Thermodynamic state

Waves, 14

1. Diffraction
2. Interference (wave propagation)
   1. Rømer's determination of the speed of light
3. Resonance

Geography, 1074

Basics, 50

1. Exploration
2. Dependent territory
3. Border
4. Suburb
5. Village

Cartography, 13

1. Contour line
2. Geodetic datum
3. Geographic coordinate system
4. Geoid
5. Great circle
6. Map projection
   1. Mercator projection
7. Reference ellipsoid
8. Scale (map)

Physical geography, 400

Land relief, 79

Africa, 4

1. Atlas Mountains
2. Drakensberg
3. Ethiopian Highlands

Americas, 19

1. American Cordillera

North America, 14

1. Adirondack Mountains
2. Appalachian Mountains
3. Black Hills
4. Bryce Canyon National Park
5. Canadian Shield
6. Interior Plains
   1. Great Plains
7. North American Cordillera
   1. Basin and Range Province
   2. Columbia Plateau
   3. Pacific Coast Ranges
      1. Sierra Nevada (U.S.)

South America, 4

1. 1. Altiplano
2. Brazilian Highlands
3. Guiana Shield

Asia, 26

Central Asia, Caucasus, Iran, Afghanistan, 7

1. Iranian plateau
2. Zagros Mountains
3. Hindu Kush
4. Caucasus Mountains
5. Tian Shan
6. Alborz
7. Turan Depression

Eastern Asia, 5

1. North China Plain
2. Tibetan Plateau
3. Kunlun Mountains
4. Yunnan-Guizhou Plateau
5. Mongolian Plateau

Northern Asia, 6

1. West Siberian Plain
2. Central Siberian Plateau
3. Altai Mountains
4. Sayan Mountains
5. Verkhoyansk Range
6. Sikhote-Alin

Southern Asia, 5

1. Deccan Plateau
2. Karakoram
3. Indo-Gangetic Plain
4. Western Ghats

Western Asia, 3

1. Pontic Mountains
2. Taurus Mountains
3. Najd

Europe, 9

1. Apennine Mountains
2. Balkan Mountains
3. Carpathian Mountains
4. East European Plain
5. North European Plain
6. Pyrenees
7. Scandinavian Mountains
8. Ural Mountains

Oceania, 3

1. Great Dividing Range
2. Southern Alps
3. Western Plateau

Antarctica, 1

1. Transantarctic Mountains

Ocean floor, 10

1. American–Antarctic Ridge
2. Chile Rise
3. East Pacific Rise
4. Gakkel Ridge
5. Mid-Atlantic Ridge
6. Pacific-Antarctic Ridge
7. Central Indian Ridge
8. Southeast Indian Ridge
9. Southwest Indian Ridge
10. Mariana Trench

Arts, 602

Literature, 130

1. 1. Ancient literature
      1. Byzantine literature
      2. Latin literature
      3. Egyptian literature
      4. Hebrew literature
      5. Japanese literature
      6. Persian literature
      7. Turkish literature
      8. Yiddish literature
   2. Czech literature
   3. Dutch literature
   4. Greek literature
      1. Belgian literature
   5. Polish literature
   6. Portuguese literature
   7. Spanish literature
      1. Latin American literature
   8. Romanian literature
   9. Russian literature
   10. Slovak literature
   11. Swiss literature
   12. Yugoslav literature
   13. Modernist literature
   14. Epic poetry
2. Literary theory
   1. Poetics
   2. Stylistics
   3. New Criticism
3. Literary genre
   1. Children's literature
   2. Detective fiction
   3. Genre fiction
   4. Science fiction
   5. Young-adult fiction
4. Fairy tale
5. Fantasy
6. Thesaurus

Fictional worlds, 15

1. Chimera (mythology)
2. Fairy
3. Ghost
4. Loch Ness Monster

Music, 160

Basics, 26

1. 1. Interval
   2. Major and minor
   3. Musical improvisation
   4. Scale (music)
   5. Rhythm
2. Singing
   1. Articulation
   2. Counterpoint
   3. Music theory
   4. Musical form
   5. Mode (music)
   6. Musical technique
   7. Twelve-tone technique
3. Music of Australia
4. Indigenous music
5. Jewish music
6. Music of Southeastern Europe
7. Music video
8. Rapping
9. Melody
10. Harmony

Music genres/forms, 65

1. Medieval music
2. Renaissance music
3. Baroque music
4. Classical period
5. Romantic music
6. 20th-century classical music
   1. Impressionist music
   2. Expressionist music
   3. Neoclassicism
7. Contemporary music
   1. Serialism
   2. Aleatoric music
   3. Minimal music
   4. Canon
   5. Cantata
   6. Chamber music
   7. Character piece
   8. Chorale
   9. Concerto
   10. Étude
   11. Fugue
   12. Hymn
   13. Lied
   14. Madrigal
   15. Overture
   16. Prelude
   17. Requiem
   18. Sonata
   19. Suite
   20. Symphonic poem
8. Country music
9. Dance music
10. Easy listening
11. Film music
12. Gamelan
    1. Bebop
    2. Dixieland
    3. Free jazz
    4. Swing music
13. Klezmer
14. Pop music
15. Rhythm and blues
    1. Soul music
    2. Heavy metal music
16. Schlager music
17. World music
18. Disco
19. Funk
20. Ragtime
21. Alternative rock
22. Punk rock

Musical instruments, 59

1. Musical instrument
2. Accordion
3. Brass instrument
4. Alto_saxophone
5. Bass guitar
6. Bass drum
7. Bassoon
8. Bells
9. Bongo
10. Carillon
11. Cello
12. Celeste
13. Tubular bells
14. Clarinet
15. Contrabassoon
16. Cornet
17. Electronic musical instrument
    1. Electric guitar
    2. Electric organ
    3. Electric piano
    4. Music sequencer
    5. Synthesizer
18. Cor anglais
19. Euphonium
20. Flugelhorn
21. Flute
22. Horn (instrument)
23. Harmonica
24. Pump organ
25. Harpsichord
26. Oboe
27. Piccolo
28. Pipe organ
29. Recorder
30. Snare drum
31. Sousaphone
32. Double bass
33. String instrument
34. Timpani
35. Trombone
36. Trumpet
37. Vibraphone
38. Xylophone
39. Zither
40. Mandolin
41. Lute
42. Wind instrument
43. Woodwind instrument
44. Bagpipes
45. Percussion instrument
46. Cymbal

Performing arts, 70

Concepts, 5

1. Audience
2. Parody

Forms, 65

1. Acrobatics
   1. Tightrope walking
   2. Trapeze
2. Magic
   1. Card manipulation
   2. Escapology
3. Musical theatre
4. Operetta
5. Oratory
6. Performance art

Dance, 21

1. Choreography
2. Bossa nova
3. B-boying
4. Folk dance
5. Foxtrot
6. Jitterbug
7. Jive
8. Mambo
9. Modern dance
10. Pasodoble
11. Quickstep
12. Rumba
13. Social dance
14. Twist
15. Waltz

Theatre, 32

1. 1. Theatre of ancient Greece
   2. Theatre of China
   3. Theatre of France
   4. Theater of the United States
   5. Amateur theatre
   6. Improvisational theatre
2. Audition
3. Biomechanics
4. Cabaret
5. Chorus line
6. Comedy
7. Commedia dell'arte
8. Dialogue
9. Dramatic theory
10. Expressionism (theatre)
11. Mystery play
12. Naturalism (theatre)
13. Poetry reading
14. Postmodern theatre
15. Puppetry
16. Soliloquy
17. Kabuki
18. Peking opera
19. Noh
20. Scenography
21. Theatre technique
22. Wayang
23. Tragedy

Visual arts, 120

History of art, 51

Early art, 8

1. Byzantine art
2. Carolingian art
3. Celtic art
4. Etruscan art
5. Miniature (illuminated manuscript)
6. Ottonian art
7. Renaissance art
8. Stained glass

Pre-modern art, 11

1. Academic art
2. Baroque
3. Classicism
4. Düsseldorf school of painting
5. Dutch Golden Age painting
6. Empire style
7. Gothic art
8. Mannerism
9. Realism (arts)
10. Romanesque art
11. Rococo

Modern art, 20

1. Modern art
2. Abstract art
3. Abstract expressionism
4. Art Deco
5. Art Nouveau
6. Bauhaus
7. Concrete art
8. Constructivism (art)
9. Cubism
10. Dada
11. Expressionism
12. Futurism
13. Impressionism
14. Kitsch
15. Neoclassicism
16. Pre-Raphaelite Brotherhood
17. Post-Impressionism
18. Suprematism
19. Surrealism
20. Symbolism (arts)

Contemporary art, 12

1. Contemporary art
2. Fluxus
3. Kinetic art
4. Land art
5. Minimalism
6. Neo-expressionism
7. Conceptual art
8. Op art
9. Outsider art
10. Pop art
11. Postmodern art
12. Transavantgarde

Artist's tools, 6

1. Charcoal
2. Paint
3. Pigment
4. Pen

Design, 3

1. Graphic design
2. Web design

Concepts and forms, 38

1. Body art
2. Drawing
3. Environmental art
4. Palette
5. Portrait miniature
6. Video art
7. Collage
8. Graffiti
9. Illustration
10. Mosaic
11. Oil painting
12. Watercolor painting

Film, 19

1. Film
   1. Computer animation
2. Color motion picture film
3. Short film
4. Silent film
5. Filmmaking
   1. Cinematography
   2. Film editing
   3. Foley (filmmaking)
   4. Gaffer
   5. Sound editor (filmmaking)
   6. Special effect
   7. Studio system
   8. Technicolor
6. Cannes Film Festival
7. Academy Award

Basic, 30

1. 1. Natural selection
   2. Gene
   3. Heredity
   4. Origin of life
2. Adaptation
3. Genetic drift
4. Mutation
5. Phylogenetics

Anatomy and Morphology, 100

1. Camouflage

Animal anatomy and morphology, 68

Circulatory system, 7

1. Artery
2. Vein
3. White blood cell

Gastrointestinal tract, 10

1. Human digestive system
2. Colon (anatomy)
3. Human tooth
4. Pancreas

Integumentary system, 8

1. Integumentary system
2. Feather
3. Fur
4. Nail (anatomy)
5. Scale (anatomy)

Muscular system, 3

1. Muscular system
2. Myocyte
3. Skeletal striated muscle

Nervous system, 17

1. Auditory system
2. Gustatory system
3. Olfactory system
4. Somatosensory system
5. Visual system
6. Intelligence
7. Hearing
8. Taste
9. Olfaction
10. Visual perception

Reproductive system, 7

1. Sex organ
2. Clitoris
3. Ovary
4. Testicle

Respiratory system, 3

1. Gill

Skeletal system, 7

1. Pelvis
2. Skull
3. Vertebral column

Tissues, 4

1. Epithelium
2. Connective tissue
3. Nervous tissue

Urinary system, 2

1. Kidney
2. Urinary bladder

Plant morphology and anatomy, 23

1. Plant cell
   1. Cell wall
2. Bark
3. Berry
   1. Pollen
4. Stoma

Life forms, 4

1. Herbaceous plant
2. Liana
3. Shrub

Plant stem, 3

1. Plant stem
2. Trunk (botany)

Plant tissues, 5

1. Epidermis (botany)
2. Ground tissue
3. Meristem
4. Vascular tissue
5. Vascular cambium

Fungal morphology and anatomy, 2

1. Hypha
2. Mycelium

Biochemistry, 28

1. Biomolecule
2. Biological pigment
   1. Carotenoid
   2. Chlorophyll
   3. Melanin
   4. Cellulose
   5. Starch
3. Fat
   1. Fatty acid
   2. Hemoglobin
   3. Amino acid
   4. Estrogen
   5. Testosterone
4. Alkaloid
5. Lactose
6. Chitin
7. Glycogen
8. Cholesterol
9. Molecular biology
10. Nucleic acid
11. Epinephrine
12. Plant hormone

Biological processes and Physiology, 42

1. Homeostasis
2. Excretion
3. Respiration (physiology)

Biological reproduction and Ontogeny, 34

Basics, 13

1. Reproduction
2. Human development (biology)
3. Developmental biology
4. Asexual reproduction
5. Sexual reproduction
   1. Pregnancy
   2. Sex
      1. Female
      2. Male
6. Menstruation
7. Menstrual cycle
8. Menopause
9. Semen

Ontogeny, 16

1. Ontogeny
2. Cuticle
3. Egg (biology)
4. Embryo
5. Fetus
6. Imago
7. Larva
8. Longevity
9. Metamorphosis
10. Microbial cyst
11. Moulting
12. Nymph (biology)
13. Puberty
14. Pupa
15. Spore
16. Tadpole

Plant reproduction, 5

1. Plant reproduction
2. Gametophyte
3. Pollination
4. Alternation of generations
5. Sporophyte

Plant physiology, 2

1. Transpiration

Ecology, 9

1. Extremophile
2. Biome
3. Competition (biology)
4. Ecological niche

Basic, 10

1. Animal
2. Arthropod
3. Chelicerata
4. Chordate
5. Gnathostomata
6. Hexapoda
7. Invertebrate
8. Nematode
9. Tetrapod
10. Vertebrate

Arachnids, 8

1. Acari
2. Arachnid
3. Opiliones
4. Pseudoscorpion
5. Scorpion
6. Solifugae
7. Spider
   1. Tarantula

Insects, 63

1. Insect
2. Caddisfly
3. Earwig
4. Flea
5. Louse
6. Mantis
7. Mecoptera
8. Neuroptera
   1. Antlion
9. Phasmatodea
10. Plecoptera
11. Psocoptera
12. Strepsiptera
13. Thrips

Beetles (Coleoptera), 9

1. Beetle
2. Curculionidae
3. Coccinellidae
4. Firefly
5. Ground beetle
6. Leaf beetle
   1. Colorado potato beetle
7. Longhorn beetle
8. Scarabaeidae

Cockroaches (Blattodea), 2

1. Cockroach
2. Termite

Flies (Diptera), 6

1. Fly
2. Drosophila melanogaster
3. Horse-fly
4. Housefly
5. Mosquito
6. Tsetse fly

Hemiptera (true bugs), 6

1. Hemiptera
2. Cicada
3. Heteroptera (typical bugs)
   1. Bed bug
   2. Gerridae (water skaters)
4. Aphid (plant lice)

Hymenoptera, 6

1. Hymenoptera
2. Ant
3. Bee
   1. Bumblebee
   2. Western honey bee
4. Wasp

Lepidoptera, 12

1. Lepidoptera
2. Butterfly
3. Bombyx mori
4. Geometer moth
5. Lycaenidae
6. Moth
7. Nymphalidae
8. Pieridae
   1. Pieris brassicae
9. Skipper (butterfly)
10. Sphingidae
11. Swallowtail butterfly

Odonata, 3

1. Odonata
2. Damselfly
3. Dragonfly

Orthoptera, 5

1. Orthoptera
2. Cricket (insect)
3. Grasshopper
4. Mole cricket
5. Tettigoniidae

Cnidarians, 3

1. Coral

Molluscas, 6

1. Oyster
2. Squid
3. Slug
   1. Snail

Invertebrata, others, 5

1. Springtail
2. Myriapoda
   1. Centipede
   2. Millipede
3. Sea spider

Amphibians, 5

1. Amphibian
2. Caecilian
3. Frog
4. Salamander
5. True frog

Birds, 104

1. Bird
2. Archaeopteryx
3. Grebe
4. Flamingo
5. Hummingbird
6. Mousebird
7. Penguin
8. Sandgrouse
9. Tinamou
10. Tropicbird

Accipitriformes and Falconiformes, 6

1. Accipiter
2. Eagle
3. Falcon
4. New World vulture
5. Osprey
6. Secretarybird

Anseriformes, 4

1. Anatidae
2. Duck
3. Goose
4. Swan

Apodiformes, 1

1. Swift

Caprimulgiformes, 2

1. Caprimulgiformes
2. Nightjar

Charadriiformes, 7

1. Charadriiformes
2. Auk
3. Buttonquail
4. Gull
5. Sandpiper
6. Skua
7. Tern

Ciconiiformes, 5

1. Heron
2. Ibis
3. Shoebill
4. Spoonbill
5. Stork

Columbiformes, 3

1. Dodo
2. Columbidae
   1. Passenger Pigeon

Coraciiformes, 3

1. Bee-eater
2. Hornbill
3. Hoopoe

Cuculiformes, 3

1. Cuckoo
2. Hoatzin
3. Turaco

Galliformes, 7

1. Galliformes
2. Chicken
3. Grouse
4. Guineafowl
5. Common Pheasant
6. Common Quail
7. Turkey (bird)

Gruiformes, 4

1. Gruiformes
2. Crane (bird)
3. Bustard
4. Rallidae

Passerines, 23

1. Passerine
2. Songbird

Corvoidea, 5

1. Bird-of-paradise
2. Corvidae
   1. Crow
   2. Eurasian Magpie
3. Shrike

Passerida, 16

1. Bulbul
2. Emberizidae
3. Finch
4. Lark
5. Motacillidae
6. Old World flycatcher
   1. European Robin
   2. Common Nightingale
7. Nuthatch
8. Sparrow
9. Starling
10. Sunbird
11. Swallow
12. Tit (bird)
13. Thrush (bird)
14. Wren

Pelecaniformes, 4

1. Cormorant
2. Darter
3. Frigatebird
4. Pelican

Piciformes, 4

1. Piciformes
2. Honeyguide
3. Toucan
4. Woodpecker

Procellariiformes, 3

1. Albatross
2. Procellariidae
3. Storm petrel

Psittaciformes, 3

1. Parrot
2. Budgerigar
3. Cockatoo

Ratites, 6

1. Cassowary
2. Emu
3. Kiwi
4. Moa
5. Ostrich
6. Rhea (bird)

Strigiformes, 5

1. Owl
2. True owl
   1. Eurasian Eagle-Owl
   2. Little Owl
3. Tytonidae

Trogoniformes, 1

1. Trogon

Fishes, 56

1. Acanthodii ("spiny sharks")
2. Osteichthyes (bony fish)
   1. Actinopterygii (ray-finned fish)
   2. Sarcopterygii (lobe-finned fish)
3. Placodermi
4. Electric eel
5. Anglerfish
6. Mullet (fish)
   1. Flathead mullet
7. Arapaima

Batoidea, 3

1. Batoidea
2. Sawfish
3. Electric ray

Characiformes, 2

1. Characiformes
2. Piranha

Chondrosteans, 1

1. Sturgeon

Clupeiformes, 3

1. Clupeiformes
2. Anchovy
3. Clupeidae

Cypriniformes, 8

1. Cypriniformes
2. Cyprinidae
   1. Common bream
   2. Carassius
   3. Common carp
   4. Goldfish
   5. Grass Carp
   6. Tench

Cyprinodontiformes, 1

1. Guppy

Elopomorpha, 1

1. Eel

Gadiformes, 3

1. Gadiformes
2. Burbot
3. Haddock

Perciformes, 8

1. Perciformes
2. Cichlid
3. Goby
4. European seabass
5. Swordfish
6. Remora
7. Scombridae
   1. Thunnus

Pleuronectiformes, 2

1. Flatfish
2. Turbot

Salmoniformes, 2

1. Salmonidae
2. Trout

Scorpaeniformes, 1

1. Scorpaeniformes

Sharks, 5

1. Shark
2. Great white shark
3. Hammerhead shark
4. Tiger shark
5. Whale shark

Siluriformes, 2

1. catfish
2. Wels catfish

Syngnathiformes, 1

1. Seahorse

Tetraodontiformes, 1

1. Tetraodontidae (pufferfish)

Dinosaurs, 10

1. Dinosaur
2. Allosaurus
3. Ankylosaurus
4. Apatosaurus (Brontosaurus)
5. Brachiosaurus
6. Diplodocus
7. Stegosaurus
8. Triceratops
9. Tyrannosaurus
10. Velociraptor

Mammals, 156

1. Mammal
2. Aardvark
3. Armadillo
4. Colugo
5. Elephant shrew
6. Hyrax
7. Pangolin
8. Sirenia
9. Treeshrew

Bats, 4

1. Bat
2. Megabat
3. Microbat
4. Vampire bat

Carnivora, 35

1. Carnivora
2. Bear
   1. Brown bear
   2. Giant panda
   3. Polar bear
3. Canidae
   1. Dog
   2. Fox
   3. Coyote
   4. Gray wolf
   5. Jackal
4. Felidae
   1. Cat
   2. Cheetah
   3. Cougar
   4. Jaguar
   5. Leopard
   6. Lion
   7. Lynx
   8. Tiger
5. Hyena
6. Mongoose
7. Mustelidae
   1. European badger
   2. Honey badger
   3. Marten
   4. Otter
   5. Sable
   6. Sea otter
   7. Stoat
   8. Weasel
   9. Wolverine
8. Procyonidae
9. Skunk
10. Viverridae

Cetaceans, 8

1. Cetacea
2. Whale
3. Blue whale
4. Dolphin
5. Humpback whale
6. Killer whale
7. Porpoise
8. Sperm whale

Erinaceids, 2

1. Erinaceidae
2. Hedgehog

Even-toed ungulates, 36

1. Even-toed ungulate
2. Ruminantia
3. Bovid
   1. African buffalo
   2. American bison
   3. Antelope
   4. Capra (genus)
   5. Cattle
   6. Gazelle
   7. Gaur
   8. Goat
   9. Impala
   10. Muskox
   11. Sheep
   12. Water buffalo
   13. Wildebeest
   14. European bison
   15. Yak
4. Camel
   1. Bactrian camel
   2. Dromedary
5. Deer
   1. Elk
   2. Moose
   3. Red deer
   4. Reindeer
6. Llama
7. Giraffe
8. Guanaco
9. Hippopotamus
10. Peccary
11. Pig
    1. Wild boar
    2. Domestic pig
12. Pronghorn
13. Vicuña

Lagomorphs, 4

1. Lagomorpha
2. Hare
3. Pika
4. Rabbit

Marsupials, 6

1. Marsupial
2. Diprotodontia
   1. Kangaroo
   2. Koala
3. Dasyuromorphia
   1. Tasmanian devil

Monotremes, 3

1. Monotreme
2. Echidna
3. Platypus

Odd-toed ungulates, 7

1. Odd-toed ungulate
2. Donkey
3. Equidae
4. Horse
5. Rhinoceros
6. Tapir
7. Zebra

Pilosa, 1

1. Sloth

Pinnipeds, 4

1. Pinniped
2. Eared seal
3. Earless seal
4. Walrus

Primates, 16

1. Primate
2. Monkey
3. Ape
   1. Chimpanzee
   2. Gibbon
   3. Gorilla
   4. Orangutan
   5. Human
4. Old World monkey
   1. Baboon
   2. Macaque
   3. Rhesus macaque
5. Strepsirrhini
   1. Galago
   2. Lemur
6. Tarsier

Proboscidea, 4

1. Proboscidea
2. Elephant
3. Mammoth
4. Mastodon

Rodents, 15

1. Rodent
2. Capybara
3. Coypu
4. Beaver
5. Dipodidae
6. Dormouse
7. Guinea pig
8. Hamster
9. Marmot
10. Mouse
11. Muridae
12. Muskrat
13. Rat
14. Squirrel
15. Spermophilus

Soricomorpha, 2

1. Shrew
2. Talpidae

Reptiles, 19

1. Reptile
   1. Alligator
2. Lizard -
   1. Chameleon
   2. Komodo dragon
   3. Gila monster
3. Snake
   1. Vipera berus
   2. Boidae
   3. Cobra
   4. Hydrophiinae
4. Turtle
   1. Galápagos tortoise
   2. Sea turtle
      1. Green sea turtle
      2. Leatherback sea turtle
      3. Loggerhead sea turtle
   3. Tortoise
5. Tuatara

Vertebrata, others, 3

1. Dimetrodon
2. Agnatha
3. Hagfish

Seedless Plant, 4

1. Fern
2. Marchantiophyta
3. Moss

Pinophyta, 6

1. Cypress
2. Fir
3. Juniper
4. Pine
5. Spruce

Fruits, 34

1. Apricot
2. Blackberry
3. Breadfruit
4. Cherry
   1. Kumquat
   2. Lime (fruit)
   3. Orange (fruit)
5. Common fig
6. Cranberry
7. Red Currant
8. Blackcurrant
9. Date
10. Guava
11. Kiwifruit
12. Lychee
13. Morus (plant)
14. Papaya
15. Pear
16. Pomegranate
17. Watermelon

Vegetables and Grain, 49

Amaranthaceae, 2

1. Beet
2. Chard

Allium, 2

1. Leek
2. Shallot

Apiaceae, 3

1. Cumin

Asteraceae, 5

1. Artichoke
2. Jerusalem artichoke
3. Chicory
4. Endive
5. Lettuce

Brassicaceae, 8

1. Eruca sativa
2. Kohlrabi
3. Rutabaga
4. Turnip

Fabaceae, 7

1. Bean
   1. Common bean

Other, 6

1. Okra
2. Sorrel

Grain, 12

1. 1. Spelt
2. Millet
3. Buckwheat
4. Amaranth
5. Quinoa

Fungus, 13

1. Chanterelle
2. Truffle

Others, 10

1. Prion
2. Plankton

Animal breeding, 29

Horses, 13

1. Arabian horse
2. Andalusian horse
3. Appaloosa
4. Clydesdale
5. Fresian
6. Hackney
7. Lipizzan
8. Morgan
9. Palomino
10. American Quarter Horse
11. Standardbred
12. Thoroughbred
13. Pony

Cats, 2

1. Siamese (cat)
2. Manx

Cattle, 4

1. Brahman (cattle)
2. Highland cattle
3. Holstein

Dogs, 10

1. Beagle
2. Chihuahua (dog)
3. Dachshund
4. Dalmatian (dog)
5. Great Dane
6. Greyhound
7. Retriever
8. German Shepherd
9. Shih Tzu
10. Terrier

Health and fitness, 25

1. Physical fitness
   1. Body mass index
   2. Physical exercise
   3. Hygiene
   4. Weight loss
2. Stress (biology)
   1. Diet (nutrition)
   2. Dietary supplement
3. Substance abuse
   1. Substance dependence
4. Drug
5. Ageing
6. Hunger

Medicine, 105

General concepts, 62

1. Physician
   1. General practitioner
   2. Surgeon
   3. Persistent vegetative state
   4. Color blindness
   5. Mental retardation
2. Injury
   1. Bone fracture
   2. Bruise
   3. Burn
   4. Frostbite
   5. Wound
3. Chemotherapy
4. Medical diagnosis
5. Organ transplantation
6. Palliative care
7. Radiation therapy
8. Artificial organ
9. Physical examination
   1. Autopsy
   2. Biopsy
   3. Blood pressure
   4. Blood test
   5. Electrocardiography
   6. Endoscopy
   7. Eye examination
   8. Lumbar puncture
   9. Pap test
   10. Pulse
   11. Reflex
   12. Urinalysis
10. Poison
    1. Toxin
11. Trauma (medicine)
    1. Aneurysm
    2. Brain damage
    3. Bleeding
    4. Cardiac arrest
    5. Hypoxia (medical)
    6. Inflammation
    7. Respiratory failure
    8. Shock (circulatory)
12. Syndrome
13. Down syndrome

Fields of medicine, 43

1. Alternative medicine
   1. Acupuncture
   2. Chiropractic
   3. Herbalism
   4. Homeopathy
   5. Naturopathy
   6. Osteopathy
   7. Holistic health
2. Angiology
   1. Dental caries
   2. Dental restoration
   3. Root canal
   4. Toothache
3. Dietitian
4. Gastroenterology
5. Obstetrics and gynaecology
6. Otolaryngology
   1. Pharmacist
   2. Prescription drug
7. Pharmacology
   1. Pharmacokinetics
   2. Antibacterial
8. Reproductive health
9. Traditional medicine

Disease, 79

Disease, 14

1. 1. Allergy
   2. Bronchitis
   3. Cirrhosis
   4. Dementia
   5. Parkinson's disease
   6. Heart disease
   7. Hepatitis
   8. Meningitis
   9. Multiple sclerosis

Cancer, 11

1. 1. Breast cancer
   2. Colorectal cancer
   3. Leukemia
   4. Lung cancer
   5. Lymphoma
   6. Prostate cancer
   7. Skin cancer
      1. Melanoma
      2. Brain tumor

Foodborne illness, 5

1. Foodborne illness
   1. Botulism
   2. Mushroom poisoning
   3. Typhoid fever
   4. Salmonella

Infectious disease, 40

1. 1. Pathogen
      1. Gonorrhea
      2. Herpes simplex
   2. Bubonic plague
   3. Diphtheria
   4. Dysentery
   5. Encephalitis
   6. Gangrene
   7. Hand, foot and mouth disease
      1. Influenza A virus subtype H5N1
   8. Leprosy
   9. Lyme disease
   10. Measles
   11. Mumps
   12. Pertussis
   13. Severe acute respiratory syndrome
   14. Scabies
   15. Scarlet fever
   16. Tetanus
   17. Transmissible spongiform encephalopathy
   18. Typhus
   19. West Nile virus
   20. Yellow fever

Mental illness, 9

1. 1. Bipolar disorder
   2. Major depressive disorder
   3. Neurosis
   4. Posttraumatic stress disorder
   5. Psychosis
      1. Delusion
      2. Hallucination

Basics, 20

1. Society
2. Community
3. Humanities
4. Communication
5. Information
6. Solidarity
7. Area studies
8. Demography
9. Information science
10. Mandate of Heaven
11. Media studies
12. Open society
13. Professional society
14. Scientific society
15. Social actions
16. Social capital
17. Social cohesion
18. Social order
19. Social structure
20. Sociobiology

Business and economics, 98

1. Business
2. [Economics]]
   1. Macroeconomics
   2. Microeconomics
   3. Good (economics)
   4. Service (economics)
   5. Supply and demand
3. Economy
4. Accountancy
5. Capital (economics)
6. Company
7. Corporation
8. Currency
   1. Euro
   2. Japanese yen
   3. Pound sterling
   4. Renminbi
   5. Rupee
   6. United States dollar
9. Coin
10. Banknotes
11. Bank
12. Cheque
13. Debt
14. Credit card
15. Loan
16. Interest
17. Gross domestic product
18. Labour economics
19. Domestic worker
20. Factory
21. Finance
22. Industry
    1. Agriculture
    2. Construction
    3. Fishing
    4. Forestry
    5. Fur trade
    6. Hunting
    7. Manufacturing
    8. Mining
    9. Oil refining
    10. Tourism
        1. Hotel
23. Whaling
24. Inflation
25. Deflation
26. Insurance
27. Investment
28. Management
29. Market
30. Marketing
31. Money
32. Monopoly
33. Moral hazard
34. Property
35. Retail
36. Shopping mall
37. Supermarket
38. Stock exchange
    1. New York Stock Exchange
    2. NASDAQ
    3. London Stock Exchange
    4. Tokyo Stock Exchange
39. Tax
    1. Corporate tax
    2. Income tax
    3. Property tax
    4. Sales tax
    5. Customs duty
40. Trade
41. Career
42. Employment
43. Unemployment
44. Layoff
45. Retirement
46. Wage

Companies, 20

1. Aldi
2. Apple Inc.
3. AT&T
4. Bank of America
5. IKEA
6. Industrial and Commercial Bank of China
7. Chevron
8. ExxonMobil
9. General Electric
10. Google
11. IBM
12. The Lego Group
13. Maersk
14. McDonald's
15. Microsoft
16. Nestlé
17. Petrobras
18. Procter & Gamble
19. Royal Dutch Shell
20. Sony
21. Walmart

Culture, 8

1. Flag
2. Cannibalism
3. Tradition
4. Birthday
5. Eid al-Fitr
6. Halloween
7. Carnival
8. Ramadan

Education, 106

1. Education
2. College
3. Curriculum
4. Learning
5. School
6. Teacher
7. University
8. Distance education
9. Higher education
10. Liberal arts education
11. E-learning
12. Academy
13. Student
14. Scholarship
15. Madrasa
16. Kindergarten
17. Thesis
18. Diploma
19. Bologna Process
20. Pedagogy
21. Reading
22. Elementary school
23. Music school

Organizations, 162

1. Central Tibetan Administration
2. FBI
3. Hells Angels
4. KGB
5. MS-13
6. Mossad
7. Sicilian Mafia
8. Yakuza

International organizations, 154

Intergovernmental organisations, 84

1. African Development Bank
2. African Union
3. ANZUS
4. Arab League
5. Arctic Council
6. Asian Development Bank
7. Asia-Pacific Economic Cooperation
8. Association of Southeast Asian Nations
9. Bank for International Settlements
10. Bolivarian Alliance for the Americas
11. Caribbean Community
12. Central Treaty Organization
13. Collective Security Treaty Organization
14. Commonwealth of Independent States
15. Commonwealth of Nations
16. Community of Portuguese Language Countries
17. Cooperation Council for the Arab States of the Gulf
18. Council of the Baltic Sea States
19. East African Community
20. Economic Community of West African States
21. Economic Cooperation Organization
22. Eurasian Economic Community
23. Eurasian Union
24. G-20 major economies
25. G8
26. Geneva Conventions
27. International Bank for Reconstruction and Development
28. International Chamber of Commerce
29. International Development Association
30. International Finance Corporation
31. International Organization for Migration
32. Inter-Parliamentary Union
33. Interpol
34. Islamic Development Bank
35. Latin Union
36. League of Nations
37. NATO
38. North American Free Trade Agreement
39. OPEC
40. Organisation for Economic Co-operation and Development
41. Organisation of African Unity
42. Organization for Security and Co-operation in Europe
43. Organization of American States
44. Organization of the Black Sea Economic Cooperation
45. Paris Club
46. Shanghai Cooperation Organisation
47. South Asian Association for Regional Cooperation
48. Southeast Asia Treaty Organization
49. Southern African Development Community
50. Union for the Mediterranean
51. Union of South American Nations
52. United Nations
    1. International Atomic Energy Agency
    2. International Court of Justice
    3. International Criminal Court
    4. International Monetary Fund
    5. Secretary-General of the United Nations
    6. UNESCO
    7. UNICEF
    8. United Nations Industrial Development Organization
    9. United Nations Secretariat
    10. United Nations Security Council
    11. World Bank
    12. World Bank Group
    13. World Health Organization
    14. World Trade Organization

European

1. Benelux
2. Central European Free Trade Agreement
3. CERN
4. Comecon
5. Council of Europe
6. Council of the European Union
7. Economic and Monetary Union of the European Union
8. European Atomic Energy Community
9. European Bank for Reconstruction and Development
10. European Coal and Steel Community
11. European Economic Community
12. European Investment Bank
13. European Parliament
14. European Union
15. Nordic Council
16. League of Corinth
17. Western European Union
18. Warsaw Pact

NGO, 70

1. Agenda 21
2. AIESEC
3. al-Qaeda
4. American Association for the Advancement of Science
5. American National Standards Institute
6. Association des États Généraux des Étudiants de l'Europe
7. Association for Computing Machinery
8. Austrian Holocaust Memorial Service
9. Austrian Service Abroad
10. Bilderberg Group
11. BirdLife International
12. College of Cardinals
13. Deutsches Institut für Normung
14. European Southern Observatory
15. Fédération Aéronautique Internationale
16. Fédération Internationale de l'Automobile
17. Fédération Internationale de Motocyclisme
18. Free Software Foundation
19. Greenpeace
20. GUAM Organization for Democracy and Economic Development
21. Hizb ut-Tahrir
22. Hospitality Club
23. Institute of Electrical and Electronics Engineers
24. International Bureau of Weights and Measures
25. International Council of Museums
26. International Council on Monuments and Sites
27. International Hydrographic Organization
28. International Maritime Organization
29. International Mathematical Union
30. International Organization for Standardization
31. International Red Cross and Red Crescent Movement
32. International Society for Krishna Consciousness
33. International Union for Conservation of Nature
34. International Union of Pure and Applied Chemistry
35. List of International Organization for Standardization standards
36. Live Earth
37. Moro Islamic Liberation Front
38. Nobel Prize
39. PEN International
40. Pirate Parties International
41. Programme for International Student Assessment
42. Pugwash Conferences on Science and World Affairs
43. Scouting
44. The Salvation Army
45. Union Cycliste Internationale
46. Unrepresented Nations and Peoples Organization
47. WikiLeaks
48. World Anti-Doping Agency
49. World Council of Churches
50. World Heritage Committee
51. World Wide Web Consortium

Humanitarian

1. Amnesty International
2. Human Rights Watch
3. Médecins Sans Frontières
4. Reporters Without Borders
5. Transparency International

Sport

1. Confédération Mondiale des Activités Subaquatiques
2. Court of Arbitration for Sport
3. European Club Association
4. European Olympic Committees
5. Fédération Internationale de Volleyball
6. FIBA
7. FIDE
8. FIFA
9. International Federation of Gymnastics
10. International Ice Hockey Federation
11. International Olympic Committee
12. National Olympic Committee
13. Olympic Council of Asia
14. UEFA

Law, 70

Basics, 31

1. Law
   1. Civil law (legal system)
   2. Common law
   3. Criminal law
2. Appeal
3. Arbitration
4. Capital punishment
5. Civil and political rights
6. Constitution
7. Contract
8. Copyright
9. Court
10. Damages
11. Equity (law)
12. Evidence (law)
13. Freedom of speech
14. Guilt (law)
15. Injunction
16. Judiciary
17. Jurisprudence
18. Justice
19. Lawyer
20. Patent
21. Rights
22. Fundamental rights
23. Police
24. Tort
25. Witness
26. Judge
27. Lawyer
28. Security

Subjects, 8

1. Administrative law
2. Case law
3. Intellectual property
4. International law
5. Property law
6. Religious law
7. Statutory law
8. Trust law

Crime, 22

1. Crime
2. Assault
3. Copyright infringement
4. Embezzlement
5. Extortion
6. Fraud
7. Genocide
8. Homicide
   1. Murder
9. Illegal drug trade
10. Kidnapping
11. Organized crime
12. Piracy
13. Poaching
14. Rape
15. Robbery
16. Sabotage
17. Sexual assault
18. Smuggling
19. Theft
20. Torture
21. Violence

Specific documents, 8

1. Magna Carta
2. United States Declaration of Independence
3. United States Constitution
4. Declaration of the Rights of Man and of the Citizen
5. The Communist Manifesto
6. Universal Declaration of Human Rights
7. International Covenant on Economic, Social and Cultural Rights
8. International Covenant on Civil and Political Rights
9. Nuremberg principles

Mass media, 84

1. Advertising
2. Cartoon
3. History of radio
4. Journalism
5. Mass media
6. News
7. Magazine
8. Associated Press
9. Reuters

Magazines, 15

1. Billboard (magazine)
2. The Economist
3. Life (magazine)
4. Mad (magazine)
5. National Geographic (magazine)
6. The New Yorker
7. People (magazine)
8. Playboy
9. Punch (magazine)
10. Reader's Digest
11. Rolling Stone
12. Scientific American
13. Der Spiegel
14. Time (magazine)
15. Vogue (magazine)

Newspapers, 9

1. Newspaper
2. Financial Times
3. Le Monde
4. Pravda
5. The Times
6. The Times of India
7. The New York Times
8. The Wall Street Journal
9. The Washington Post

Radio, 4

1. The Goon Show
2. Grand Ole Opry
3. The Shadow
4. The War of the Worlds (radio drama)

Television, 38

1. Documentary film
2. European Broadcasting Union
3. Emmy Award
4. Game show
5. Sitcom
6. Soap opera
7. Television program
8. 60 Minutes
9. All in the Family
10. American Idol
11. BBC World News
12. Disney Channel
13. Doctor Who
14. Friends
15. Guiding Light
16. Gunsmoke
17. I Love Lucy
18. Meet the Press
19. Monty Python's Flying Circus
20. Roots (TV miniseries)
21. Sesame Street
22. The Simpsons
23. Star Trek
24. Tom and Jerry
25. The Tonight Show
26. The Twilight Zone

Television network

1. Television network
2. Al Jazeera
3. American Broadcasting Company
4. ARD
5. BBC
6. CBS
7. China Central Television
8. CNN
9. Deutsche Welle
10. ITV
11. NBC
12. PBS

Websites, 9

1. Amazon
2. EBay
3. Facebook
4. Myspace
5. Twitter
6. Google Search
7. Internet Movie Database
8. YouTube
9. Wikipedia

Museums, 18

1. Museum

United States

1. American Museum of Natural History
2. J. Paul Getty Museum
3. Museum of Modern Art
4. National Gallery of Art
5. Philadelphia Museum of Art
6. Smithsonian Institution

Other

1. Deutsches Museum
2. Hermitage Museum
3. Metropolitan Museum of Art
4. Musée du Louvre
5. Musée d'Orsay
6. Natural History Museum (London)
7. Musée National d'Art Moderne
8. Museo del Prado
9. Uffizi
10. Vatican Museums
11. Victoria and Albert Museum

Politics and government, 198

1. Civics
2. Politics
3. Civil liberties
4. Diplomacy
   1. Ambassador
   2. Diplomatic mission
5. Election
6. Globalization
7. Political party
8. Propaganda
9. Revolution
10. Separation of powers
11. Legislature
12. Rule of law
13. Citizenship
14. Constitutional law
15. Census
16. Computer security
17. Golden Rule
18. Habeas corpus
19. Information security
20. Individualism
21. Impeachment
22. International relations
23. Labour law
24. Minimum wage
25. Manifesto
26. Nationality
27. Passport
28. Politburo
29. Social security
30. Self-determination
31. Treason
32. Civil disobedience
33. Social contract
34. Decentralization
35. Mixed economy
36. Veto
37. Crown (headgear)
38. Censorship
39. Autonomy
40. E-Government
41. National Convention
42. Legal personality
43. Foreign policy
44. The Internationale
45. Public law
46. Flash mob
47. State religion
48. Curfew
49. Natural and legal rights
50. Identity document
51. Seat of local government
52. Public health
53. Human overpopulation
54. Demonstration (people)
55. Therapy
56. Socialist International
57. Bureaucracy
58. Volunteering
59. Dictatorship of the proletariat
60. International Workers' Day
61. Class conflict
62. Working class

Governance

1. Cabinet (government)
2. Coup d'état
3. Cult of personality
4. Executive (government)
5. Government
6. Parliament
7. Parliamentary system
8. Presidential system
   1. Semi-presidential system
9. Public administration
10. Roman Senate
11. State of emergency
12. Voting
13. Voting system

Types of states and state divisions

1. Administrative division
2. Arrondissement
3. Caliphate
4. City-state
5. Colony
6. Confederation
7. County
8. Duchy
9. Electoral district
10. Emirate
11. Empire
12. Federated state
13. Federation
14. Indian reservation
15. Municipality
16. Nation-state
17. Neighbourhood
18. Personal union
19. Police state
20. Principality
21. Protectorate
22. Province
23. Puppet state
24. Single-party state
25. Sovereign state
26. State
27. Unitary state
28. Virtual community

Ideology and political theory, 29

1. Activism
2. Anarchism
3. Authoritarianism
4. Bicameralism
5. Capitalism
6. Christian democracy
7. Communism
8. Conservatism
9. Constitutionalism
10. Cosmopolitanism
11. Despotism
12. Egalitarianism
13. Fascism
14. Federalism
15. Green politics
16. Ideology
17. Imperialism
18. Islamism
19. Juche
20. Leninism
21. Liberalism
22. Libertarianism
23. Marxism
24. Multiculturalism
25. Nationalism
26. Nazism
27. Ostracism
28. Patriotism
29. Separatism
30. Social democracy
31. Socialism
    1. Democratic socialism
    2. Socialist realism
    3. Utopian socialism
32. Statism
33. Totalitarianism
34. Zionism

Forms of government

1. Absolutism
2. Colonialism
3. Constitutional monarchy
4. Democracy
   1. Direct democracy
   2. Liberal democracy
   3. Representative democracy
5. Dictatorship
6. Enlightened absolutism
7. Hegemony
8. Kleptocracy
9. Matriarchy
10. Meritocracy
11. Monarch
12. Monarchy
13. Ochlocracy
14. Oligarchy
15. Patriarchy
16. Planned economy
17. Plutocracy
18. Republic
    1. Parliamentary republic
19. Technocracy
20. Theocracy
21. Triumvirate

Titles

1. Bey
2. Caliph
3. Dictator
4. Emir
5. Führer
6. Governor
7. Grand duke
8. Head of state
9. Khan (title)
10. Mayor
11. Ombudsman
12. President
13. Prime minister
14. Prince
15. Prosecutor
16. Satrap
17. Shah
18. Sultan
19. Tsar
20. Tyrant
21. Vizier

Historic events/books

1. Eurozone crisis
2. French Directory
3. Glasnost
4. Leviathan (book)
5. May 1968 events in France
6. Orange Revolution
7. Reign of Terror
8. Simony
9. Velvet Revolution

Society, 42

1. Civil society
2. Institution

Groups, 7

1. Consortium
2. Organization
3. Nonprofit organization
4. Partnership
5. Secret society
6. Social network
7. Tribe

Services and institutions, 4

1. Boarding school
2. Orphanage
3. Prison
4. Social work

Social issues, 21

1. Abortion
2. Birth control
3. Corruption
4. Deforestation
5. Discrimination
   1. Racism
   2. Sexism
6. Euthanasia
7. Famine
8. Political freedom
9. Human rights
10. One-child policy
11. Pollution
    1. Air pollution
12. Poverty
13. Sustainable development
14. Slavery
15. Social movement
    1. Environmentalism
    2. Feminism
16. World peace

Social status, 8

1. Minority group
2. Social stratification
3. Caste
4. Dalit
5. Social class
6. Clergy
7. Middle class
8. Proletariat

Social sciences, 8

Only those not treated previously

1. Social science
2. Political science
3. Social change
4. Social control
5. Social research
6. Social theory
7. Sociological theory
8. Sociology

War and military, 86

1. Peace
2. War
3. Casualty (person)
4. Declaration of war
5. Defensive wall
6. Desertion
7. Duel
8. Fortification
9. Laws of war
10. Medal
11. Militarism
12. Military–industrial complex
13. Military uniform
14. Mercenary
15. Operational level of war
16. Pacifism
17. Prisoner of war
18. Refugee
19. Surrender (military)
20. War crime
21. Total war
22. Martial law
23. Psychological warfare
24. Paramilitary
25. Scorched earth
26. Casus belli
27. Demilitarized zone
28. Commander-in-chief
29. Killed in action
30. War reparations
31. Ceasefire
32. Military operation
33. Special forces
34. Arms race

Military, 7

1. Military
2. Conscription
3. Military education and training
4. Military logistics
5. Military science
6. Military strategy
7. Military tactics

Military forces, 6

1. Armed forces
2. Air force
3. Army
4. Cavalry
5. Infantry
6. Navy

Military operations, 6

1. Battle
2. Blockade
3. Combat
4. Military campaign
5. Offensive (military)
6. Siege

Military organization, 5

1. Military organization
2. Battalion
3. Command and control
4. Division (military)
5. Staff (military)

Military ranks, 13

1. Military rank
2. Admiral
3. Captain (armed forces)
4. Colonel
5. General officer
6. Lieutenant
7. Major
8. Marshal
9. Officer (armed forces)
10. Private (rank)
11. Sergeant
12. Seaman
13. Soldier

Wars by type, 5

1. Civil war
2. Ethnic conflict
3. Invasion
4. Rebellion
5. Terrorism

Warfare by type, 10

1. Aerial warfare
2. Anti-aircraft warfare
3. Anti-tank warfare
4. Armoured warfare
5. Conventional warfare
6. Espionage
7. Guerrilla warfare
8. Naval warfare
9. Sniper
10. Trench warfare

Anthropology, 40

1. Anthropology
2. Culture
3. Festival
4. Holiday
5. Biological anthropology
6. Race (classification of humans)
7. Cultural anthropology
8. Linguistic anthropology
9. Social anthropology
10. People

Ethnology, 30

1. Ethnology
2. Ethnic group
3. Ethnography
4. Indigenous peoples

Ethnic groups, 26

1. Bantu peoples
2. Basque people
3. Bushmen
4. Germanic peoples
5. Indigenous Australians
6. Indigenous peoples of the Americas
   1. Cherokee
7. Inuit
8. Jews
9. Kurdish people
10. Maasai people
11. Mongols
12. Romani people
13. Slavic peoples
14. Tutsi
15. Arab people
16. Austronesian peoples
17. Berber people
18. Creole peoples
19. Han Chinese
20. Malayali
21. Māori people
22. Proto-Indo-Europeans
23. Semitic
24. Turkish people
25. Uyghur people

Family and kinship , 49

1. Kinship
2. Family
   1. Household
   2. Nuclear family
   3. Extended family
   4. Stepfamily
3. affinity (law) (In-laws)
4. Clan
5. Consanguinity
6. Godparent
7. Pet

Family members, 17

1. Significant others
   1. Husband
   2. Wife
   3. Boyfriend
   4. Girlfriend
2. Parent and children
   1. Father
   2. Mother
   3. Daughter
   4. Son
3. Siblings
   1. Nephew and niece
   2. Twin
4. Grandparents and their descendants
   1. Uncle
   2. Aunt
   3. Cousin

Familial relation and their establishment, 21

1. Courtship
2. Romance (love)
3. Dating
4. Interpersonal relationship
   1. Casual relationship
   2. Intimate relationship
   3. Friendship
   4. Cohabitation
5. Wedding
6. Marriage
   1. Civil marriage
   2. Civil union
7. Monogamy
8. Bigamy
9. Polygamy
10. Infidelity
    1. Divorce
11. Family planning
12. Childbirth
13. Parenting
14. Adoption

Cooking, food and drink, 150

For fruits, vegetables, herbs and animals kept for food, see Biology/Organisms

Basic, 20

1. Cooking
2. Cuisine
3. Food
4. Drink
5. Vitamin
6. Meal
   1. Breakfast
   2. Lunch
   3. Dinner
   4. Tea (meal)
7. Dish
   1. Entrée
   2. Main course
   3. Dessert
8. Cooking oil
   1. Olive oil
   2. Palm oil
9. Fast food
10. Restaurant
11. Vegetarianism

Dairy and analogues, 14

1. Milk
2. Butter
   1. Margarine
3. Cream
4. Cheese
   1. Blue cheese
   2. Cheddar cheese
   3. Mozzarella
   4. Parmigiano-Reggiano
5. Coconut milk
6. Ice cream
7. Soy milk
   1. Tofu
8. Yogurt

Grains, 3

1. Bread
2. Cereal
3. Flour

Sweet Things, 4

1. Candy
2. Caramel
3. Chocolate
4. Honey

Nuts, 3

1. Nut (fruit)
2. Hazelnut
3. Walnut

Meat and other animal products, 17

1. Egg (food)
2. Meat
   1. Bacon
   2. Beef
   3. Chicken (food)
   4. Ham
   5. Hamburger
   6. Hot dog
   7. Lamb and mutton
   8. Pork
3. Lard
4. Offal
   1. Blood as food
   2. Liver (food)
5. Sausage
6. Seafood
   1. Fish (food)

Herbs and condiments, 31

Categories, 4

1. Condiment
2. Herb
3. Sauce
4. Spice

Specific herbs, 16

1. Anise
2. Basil
3. Black pepper
4. Cardamom
5. Cinnamon
6. Fennel
7. Garlic
8. Ginger
9. Horseradish
10. Lavandula
11. Lemongrass
12. Liquorice
13. Mentha
14. Onion
15. Parsley
16. Saffron

Specific condiments, 11

1. Chutney
2. Fish sauce
3. Fruit preserves
4. Ketchup
5. Mayonnaise
6. Mustard (condiment)
7. Paprika
8. Pesto
9. Soy sauce
10. Tartar sauce
11. Vinegar

Food and Dish types, 20

1. Cake
2. Casserole
3. Curry
4. Dumpling
5. Fondue
6. French fries
7. Fried rice
8. Kebab
9. Noodles
10. Pasta
11. Pastry
12. Pie
13. Pizza
14. Porridge
15. Salad
16. Samosa
17. Sandwich
18. Soup
19. Stew
20. Sushi

Drinks, 18

Drunk cool, 10

1. Drinking water
2. Iced tea
3. Juice
   1. Orange juice
4. Lemonade
5. Soft drink
   1. Cola
      1. Coca-Cola
   2. Energy drink
   3. Tonic water

Drunk heated, 8

1. Tea
   1. Green tea
   2. Black tea
2. Coffee
   1. Espresso
   2. Turkish coffee
3. Hot chocolate
4. Mate (beverage)

Alcohol, 20

1. Alcoholic beverage
2. Distilled beverage
3. Beer
4. Brandy
5. Cider
6. Gin
7. Liqueur
8. Rum
9. Sake
10. Tequila
11. Vodka
12. Whisky
13. Wine
    1. Red wine
    2. White wine
    3. Sparkling wine

Mixed drinks, 4

1. Cocktail
2. Martini
3. Mojito
4. Sangria

Household items, 50

For appliance, see under "Mechanical engineering and machinery"

Clothing and fashion, 26

1. Belt (clothing)
2. Burqa
3. Button
4. Cloak
5. Clothing
6. Coat
7. Dress
8. Glove
9. Hat
10. Necktie
11. Trousers
12. Shoe
13. Scarf
14. Shirt
15. Skirt
16. Swimsuit
17. Sock
18. Hook and loop fastener
19. Zipper
20. Beard
21. Brassiere
22. Cosmetics
23. Perfume
24. Jewellery
25. Mask
26. Tattoo

Furniture and decoration, 13

1. Bathtub
2. Bed
3. Bench (furniture)
4. Cabinetry
5. Chair
6. Commode
7. Couch
8. Cupboard
9. Desk
10. Fireplace
11. Furniture
12. Home appliance
13. Table (furniture)

Textile, 5

1. Textile
2. Bedding
3. Carpet
4. Curtain
5. Pillow

Kitchen utensils, 6

1. Cookware
2. Cutlery
   1. Fork
   2. Spoon
3. Chopsticks
4. Plate (dishware)

Sexuality, 20

1. Human sexuality
2. Man
3. Woman
4. Heterosexuality
5. Homosexuality
6. Sexual intercourse
7. Safe sex
8. Fertility
9. Kiss
10. Sexual attraction
11. Sexual orientation
12. Bisexuality
13. Foreplay
14. Oral sex
15. Orgasm
16. Combined oral contraceptive pill
17. Condom
18. Masturbation
19. Prostitution
20. Pornography

Stages of life, 11

1. Childhood
   1. Newborn
   2. Infant
   3. Child
   4. Boy
   5. Girl
2. Youth
3. Adolescence
4. Adult
5. Middle age
6. Old age

Psychology, 87

1. Psychology
2. Clinical psychology
3. Cognitive psychology
4. Evolutionary psychology
5. Personality psychology
6. Psychology of religion
7. Psychotherapy
8. Genius
9. Hypnosis
10. Libido
11. Phobia
12. Pessimism
13. Perception
14. Social psychology
15. Stockholm syndrome
16. Cognition
17. Leadership
18. Creativity
19. Power
20. Optimism
21. Human nature
22. Imagination
23. Crying
24. Hyprocrisy
25. Oedipus complex
26. Sense
27. Memory

Psychology schools, 6

1. Analytical psychology
2. Behaviorism
3. Developmental psychology
4. Gestalt psychology
5. Humanistic psychology
6. Psychoanalysis

Basic concepts, 13

1. Consciousness
   1. Sleep
   2. Dream
2. Instinct
3. Mind
4. Mood
5. Temperament
6. Personality
7. Motivation
8. Stereotype
9. Thought
10. Behavior
11. Emotion

Emotions, 23

1. Anger
2. Anxiety
3. Compassion
4. Courage
5. Curiosity
6. Disgust
7. Doubt
8. Envy
9. Fear
10. Guilt (emotion)
11. Happiness
12. Hatred
13. Hope
14. Jealousy
15. Love
16. Lust
17. Pride
18. Sadness
19. Shame
20. Surprise (emotion)
21. Humour
22. Pleasure
23. Suffering

Interpersonal relations, 18

1. Aggression
2. Altruism
3. Authority
4. Betrayal
5. Bullying
6. Charisma
7. Competition
8. Conformity
9. Egocentrism
10. Empathy
11. Forgiveness
12. Lie
13. Privacy
14. Prejudice
15. Punishment
16. Respect
17. Shyness
18. Trust

Language, 165

Basic, 41

1. Language
2. Clause
3. Constructed language
4. Dialect
5. Dictionary
6. Grammar
   1. Adjective
   2. Adverb
   3. Conjunction
   4. Grammatical case
   5. Noun
   6. Adposition
   7. Pronoun
   8. Syntax
   9. Verb
7. Linguistics
   1. Comparative linguistics
   2. Etymology
   3. Historical linguistics
   4. Phonetics
      1. Phonetic transcription
   5. Transformational grammar
8. Literacy
9. Morphology
10. Philology
11. Pronunciation
12. Rhetoric
13. Translation
14. Word
    1. Phoneme
       1. Consonant
       2. Vowel
    2. Syllable
15. Writing
    1. Diacritic
16. Writing system
17. Name
18. Phonology
19. Semantics
20. Semiotics
21. Symbol

Language Family, 26

1. Language family
   1. Afroasiatic languages
      1. Semitic languages
   2. Algic languages
   3. Altaic languages
   4. Austro-Asiatic languages
   5. Austronesian languages
   6. Dravidian languages
   7. Eskimo–Aleut languages
   8. Indo-European languages
      1. Germanic languages
      2. Iranian languages
      3. Romance languages
      4. Slavic languages
   9. Khoisan languages
   10. Niger–Congo languages
   11. Nilo-Saharan languages
   12. North Caucasian
   13. Sino-Tibetan languages
   14. South Caucasian
   15. Tai–Kadai languages
   16. Trans–New Guinea languages
   17. Tungusic languages
   18. Turkic languages
   19. Uralic languages
   20. Uto-Aztecan languages

Alphabets and writing systems, 19

1. Alphabet
2. Letter (alphabet)
3. Braille
4. Arabic alphabet
5. Chinese characters
6. Cuneiform
7. Cyrillic script
8. Devanagari
9. Egyptian hieroglyphs
10. Georgian scripts
11. Greek alphabet
12. Hangul
13. Latin script alphabet
14. Phoenician alphabet
15. Runes
16. Rosetta Stone
17. International Phonetic Alphabet
18. Morse code
19. Syllabary

Specific languages, 77

1. Ancient Greek
2. Aramaic language
3. Arabic language
4. Bengali language
5. Chinese language
6. Danish language
7. Egyptian language
8. English language
9. Esperanto
10. French language
11. German language
12. Greek language
13. Gujarati language
14. Hebrew language
15. Hindi-Urdu
    1. Hindi
16. Italian language
17. Japanese language
18. Javanese language
19. Korean language
20. Latin
21. Mandarin Chinese
22. Marathi language
23. Min Chinese
24. Polish language
25. Portuguese language
26. Persian language
27. Russian language
28. Sanskrit
29. Spanish language
30. Swahili language
31. Syriac language
32. Tamil language
33. Tagalog language
34. Telugu language
35. Turkish language
36. Punjabi language
37. Ukrainian language
38. Vietnamese language
39. Wu Chinese
40. Yue Chinese
41. Burmese language
42. Hungarian language
43. Quechua languages
44. Thai language
45. Akkadian language
46. Amharic language
47. Berber languages
48. Coptic language
49. Somali language
50. Indonesian language
51. Malagasy language
52. Malay language
53. Khmer language
54. Armenian language
55. Assamese language
56. Urdu
57. Nepali language
58. Oriya language
59. Pali
60. Sindhi language
61. Catalan language
62. Romanian language
63. Dutch language
64. Swedish language
65. Yiddish language
66. Kurdish language
67. Pashto language
68. Bulgarian language
69. Czech language
70. Serbo-Croatian
71. Kannada
72. Malayalam
73. Zulu language
74. Azerbaijani language
75. Kazakh language
76. Uzbek language

Visual/tactile language, 2

1. Fingerspelling
2. Sign language

Recreation: games and sports, 181

"Media"-based entertainment are in other categories: "Literature" (books, plays), "Performing arts" (theater, ballet etc.), "Mass Media" (television), and "Visual arts" (movies and comics).

Basic, 21

1. Recreation
2. Entertainment
3. Game
4. Amusement park
5. Gambling
   1. Casino
   2. Dice
   3. Lottery
   4. Roulette
   5. Poker
   6. Blackjack
   7. Slot machine
6. Leisure
7. Party
8. Play (activity)
9. Puzzle
   1. Crossword
   2. Sudoku
10. Toy
11. Aquarium
12. Zoo

Games, 21

1. Board game
   1. Backgammon
   2. Chess
   3. Draughts
   4. Cluedo
   5. Go (game)
   6. Monopoly (game)
   7. Scrabble
   8. Pachisi
   9. Xiangqi
2. Mancala
3. Marble (toy)
4. Playing cards
5. Video games
   1. Pokémon
   2. Pong
6. Arcade game
7. Card game
8. Contract bridge
9. Darts
10. Dominoes

Toys, 8

1. Doll
2. Flying disc
3. Lego
4. Modelling clay
5. Rubik's Cube
6. Slinky
7. Barbie
8. Yo-yo

Sports, 131

Basics, 11

1. Sport
2. Ball game
   1. Ball
3. Stadium
4. Swimming pool
5. Olympic Games
   1. Paralympic Games
   2. Summer Olympic Games
   3. Winter Olympic Games
6. Doping in sport
7. Winter sport

Team sports, 35

1. American football
   1. National Football League
   2. Super Bowl
2. Australian rules football
3. Baseball
   1. Major League Baseball
   2. World Series
4. Basketball
   1. National Basketball Association
5. Basque pelota
6. Cricket
   1. Cricket World Cup
7. Curling
8. Fistball
9. Floorball
10. Association football
    1. FIFA World Cup
    2. Goalkeeper
    3. UEFA European Football Championship
    4. Premier League
    5. UEFA Champions League
11. Team handball
12. Hockey
    1. Field hockey
    2. Ice hockey
       1. National Hockey League
13. Lacrosse
14. Polo
15. Ringette
16. Rugby football
    1. Rugby league
    2. Rugby sevens
    3. Rugby union
17. Softball
18. Volleyball
    1. Beach volleyball

Athletics, 11

1. Athletics (sport)
   1. Decathlon
   2. Discus throw
   3. High jump
   4. Hurdling
   5. Javelin throw
   6. Long jump
   7. Running
      1. Marathon
   8. Pole vault
   9. Shot put

Skating, 5

1. Ice skating
   1. Figure skating
   2. Speed skating
2. Roller skating
3. Skateboarding

Water sports, 5

1. Canoeing
2. Diving
3. Rowing (sport)
4. Human swimming
5. Water polo

Other individual sports, 49

1. Angling
2. Archery
3. Auto racing
   1. Formula One
   2. NASCAR
4. Badminton
5. Bodybuilding
6. Bowls
   1. Bocce
   2. Bowling
7. Cue sports
8. Cycling
   1. Mountain bike
   2. Time trial
   3. Tour de France
9. Equestrianism
   1. Dressage
   2. Horse racing
   3. Rodeo
   4. Show jumping
10. Fencing
    1. Foil (fencing)
    2. Sabre (fencing)
11. Golf
12. Gymnastics
    1. Floor (gymnastics)
    2. Somersault
    3. Trampoline
    4. Vault (gymnastics)
13. Modern pentathlon
14. Orienteering
15. Skiing
    1. Alpine skiing
    2. Biathlon
    3. Nordic skiing
    4. Ski jumping
    5. Slalom skiing
    6. Ski
16. Sled
    1. Bobsleigh
    2. Luge
17. Snooker
18. Snowboarding
19. Squash (sport)
20. Surfing
21. Table tennis
22. Tennis
    1. Racket (sports equipment)
23. Olympic weightlifting

Fighting sport and martial arts, 14

1. Martial arts
2. Boxing
   1. Heavyweight
   2. Welterweight
3. Judo
4. Karate
5. Kickboxing
6. Mixed martial arts
7. Taekwondo
8. Wrestling
   1. Freestyle wrestling
   2. Greco-Roman wrestling
   3. Sumo
9. Wushu (sport)

Timekeeping, 27

For the units of time (hour, day, etc.), see under "measurements"

Calendar and timekeeping, 8

1. Calendar
   1. Chinese calendar
   2. Islamic calendar
   3. Gregorian calendar
2. Leap year
3. Daylight saving time
4. Night
5. Time zone

Days of the week, 7

1. Sunday
2. Monday
3. Tuesday
4. Wednesday
5. Thursday
6. Friday
7. Saturday

Months of the year, 12

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

Colors, 20

1. Color
   1. Black
   2. Blue
   3. Brown
   4. Cyan
   5. Green
   6. Gray
   7. Magenta
   8. Orange (colour)
   9. Pink
   10. Purple
   11. Red
   12. Yellow
   13. White
2. Primary color
3. Brightness
4. Colorfulness
5. Color vision
6. Gloss (material appearance)
7. Hue

General topics, 14

1. History
2. Civilization
3. History of the Earth
4. History of the world
5. Archive
6. Biography
7. Castle
8. Estates of the realm
   1. Bourgeoisie
   2. Nobility
9. Emperor
10. Feudalism
11. Graf
12. Tithe

Auxiliary sciences of history, 15

1. Archaeology
   1. Archaeological culture
   2. Archaeogenetics
2. Chronology
3. Diplomatics
4. Epigraphy
5. Genealogy
6. Heraldry
   1. Coat of arms
7. Historiography
   1. Conspiracy theory
8. Numismatics
9. Palaeography
10. Philately
11. Philosophy of history

History of science and technology, 18

1. History of science
2. History of agriculture
3. History of astronomy
4. History of aviation
5. History of biology
6. History of chemistry
7. History of geography
8. History of geology
9. History of physics
10. History of mathematics
11. History of economic thought
12. History of linguistics
13. History of psychology
14. History of sociology
15. History of technology
16. History of medicine
17. History of computing hardware
18. History of writing

History of other topics, 16

1. Art history
2. History of art
3. Cultural history
4. History of architecture
5. History of film
6. Legal history
7. History of literature
8. Military history
9. History of music
10. History of philosophy
11. History of religions
    1. History of Buddhism
    2. Jewish history
    3. History of Christianity
    4. History of Hinduism
    5. History of Islam

History by continent, 8

1. History of Africa
2. History of the Americas
   1. History of North America
   2. History of South America
3. History of Antarctica
4. History of Asia
5. History of Europe
6. History of Oceania

History by region, 5

1. History of Central America
2. History of the Caribbean
3. History of the Balkans
4. History of the Middle East
5. History of Scandinavia

History by country, 96

Africa, 13

1. History of Egypt
2. History of Eritrea
3. History of Ethiopia
4. History of Ghana
5. History of Libya
6. History of Madagascar
7. History of Morocco
8. History of Nigeria
9. History of Senegal
10. History of Sierra Leone
11. History of Somalia
12. History of South Africa
13. History of Sudan

Americas, 15

1. History of Argentina
2. History of Bolivia
3. History of Brazil
4. History of Canada
5. History of Chile
6. History of Colombia
7. History of Cuba
8. History of Ecuador
9. History of Guyana
10. History of Haiti
11. History of Mexico
12. History of Paraguay
13. History of Peru
14. History of the United States
15. History of Venezuela

Asia, 31

1. History of Afghanistan
2. History of Azerbaijan
3. History of Bangladesh
4. History of Bhutan
5. History of Burma
6. History of Cambodia
7. History of China
8. History of India
9. History of Indonesia
10. History of Israel
11. History of Iraq
12. History of Iran
13. History of Japan
14. History of Korea
15. History of Lebanon
16. History of Malaysia
17. History of Mongolia
18. History of Nepal
19. History of Pakistan
20. History of Palestine
21. History of the Philippines
22. History of Saudi Arabia
23. History of Singapore
24. History of Sri Lanka
25. History of Syria
26. History of Taiwan
27. History of Thailand
28. History of Tibet
29. History of Turkey
30. History of Vietnam
31. History of Yemen

Europe, 35

1. History of Albania
2. History of Armenia
3. History of Austria
4. History of Belgium
5. History of Bulgaria
6. History of Croatia
7. History of Denmark
8. History of England
9. History of Estonia
10. History of Finland
11. History of France
12. History of Georgia
13. History of Germany
14. History of Greece
15. History of Hungary
16. History of Iceland
17. History of the Republic of Ireland
18. History of Italy
19. History of Latvia
20. History of Lithuania
21. History of Malta
22. History of the Netherlands
23. History of Norway
24. History of Poland
25. History of Portugal
26. History of Romania
27. History of Russia
28. History of Scotland
29. History of Serbia
30. History of Spain
31. History of Sweden
32. History of Switzerland
33. History of Ukraine
34. History of the United Kingdom
35. History of Wales

Oceania, 2

1. History of Australia
2. History of New Zealand

Prehistory and Ancient history, 171

Basic, 8

1. Stone Age
2. Bronze Age
3. Iron Age
4. Chalcolithic
5. Ancient history
6. Classical antiquity
7. Late Antiquity
8. Hellenistic period

Prehistory, 20

1. Prehistory
2. Australopithecus
3. Cro-Magnon
4. Java Man
5. Peking Man
6. Homo erectus
7. Human evolution
8. Denisovan
9. Neanderthal
10. Paranthropus
11. Early human migrations

Stone Age, 9

1. Paleolithic
   1. Lower Paleolithic
   2. Middle Paleolithic
   3. Upper Paleolithic
2. Mesolithic
3. Neolithic Revolution
4. Neolithic
5. Cradle of civilization
6. Control of fire by early humans

Africa, 19

1. Ancient Egypt
   1. Naqada III
   2. Pharaoh
   3. Ptolemaic Kingdom
   4. Thebes, Egypt
   5. Memphis, Egypt
   6. Old Kingdom of Egypt
   7. Middle Kingdom of Egypt
   8. New Kingdom of Egypt
   9. Valley of the Kings
2. Nok culture
3. Nubia
   1. Kingdom of Kush
   2. Meroë
4. Kingdom of Aksum
5. Ancient Carthage
   1. Carthage
   2. Punic Wars
6. Land of Punt

Americas, 10

1. Andean civilizations
   1. Chavín culture
   2. Norte Chico civilization
2. Mesoamerica
3. Maya civilization
4. Paleo-Indians
5. Teotihuacan
6. Olmec
7. Settlement of the Americas
8. Zapotec civilization

Asia, 69

1. Silk Road

Central Asia, Iran, Caucasus, 15

1. Achaemenid Empire
2. Atropatene
3. Bactria
4. Caucasian Albania
5. Caucasian Iberia
6. Elam
   1. Susa
7. Medes
8. Parthian Empire
9. Persepolis
10. Roman–Persian Wars
11. Saka
12. Sassanid Empire
13. Sogdiana
14. Tocharians

Eastern Asia, 10

1. Gojoseon
2. Jōmon period
3. Shang Dynasty
4. Spring and Autumn period
5. Three Kingdoms of Korea
6. Warring States period
7. Zhou Dynasty
8. Yayoi period
9. Three Sovereigns and Five Emperors
10. Xiongnu

Southern Asia, 11

1. Chola dynasty
2. Gupta Empire
3. Indus Valley Civilization
   1. Mohenjo-daro
4. Indo-Greeks
5. Indo-Scythians
6. Kushan Empire
7. Magadha
8. Maurya Empire
9. Satavahana dynasty
10. Vedic period

Southeastern Asia, 3

1. Nanyue
2. Pyu city-states
3. Hong Bang dynasty

Western Asia, 29

1. Mesopotamia
2. Akkad
3. Amorite
4. Kingdom of Armenia
5. Assyria
   1. Nineveh
6. Babylonia
   1. Babylon
   2. Chaldea
7. Ebla
8. History of ancient Israel and Judah
9. Hittites
10. Lydia
11. Mitanni
12. Palmyra
13. Phoenicia
    1. Tyre, Lebanon
14. Phrygia
15. Seleucid Empire
16. Sabaeans
17. Sumer
    1. Ur
18. Troy
    1. Trojan War
19. Ugarit
20. Urartu
21. Fertile Crescent
22. Kingdom of Armenia (antiquity)
23. Syrian Wars

Europe, 45

1. Minoan civilization
   1. Knossos
2. Dacia
   1. Dacians
3. Etruscan civilization
4. Ancient Greece
   1. Mycenaean Greece
   2. Greco-Persian Wars
   3. Magna Graecia
   4. Delian League
   5. Sparta
5. Ancient Rome
   1. Roman Kingdom
   2. Roman Republic
   3. Roman Empire
      1. Pompeii
   4. Western Roman Empire
   5. Decline of the Roman Empire
   6. Crisis of the Third Century
   7. Julio-Claudian dynasty
   8. Nerva–Antonine dynasty
   9. Gallic Wars
   10. Macedonian Wars
   11. Roman civil wars
6. Macedonia (ancient kingdom)
7. Celts
8. Cimmerians
9. Sarmatians
10. Saxons
11. Scythia
    1. Scythians
12. Thrace
13. Migration Period
    1. Alans
    2. Angles
    3. Bulgars
    4. Burgundians
    5. Goths
       1. Ostrogoths
       2. Visigoths
    6. Huns
    7. Moors
    8. Rus' people
    9. Suebi
    10. Vandals

Middle Ages, 150

1. Middle Ages
2. Guild
3. Boyar
4. Knight
5. Knyaz
6. Samurai
7. Serfdom
8. Chivalry

Africa, 8

1. Ajuran Sultanate
2. Almoravid dynasty
3. Ghana Empire
4. Kanem Empire
5. Mali Empire
6. Songhai Empire
7. Timbuktu
8. Trans-Saharan trade

Americas, 8

1. Aztec
2. Inca Empire
3. Pre-Columbian era
4. Chimú culture
5. Mississippian culture
6. Moche (culture)
7. Tiwanaku
8. Wari culture

Asia, 50

1. Islamic Golden Age
2. Mamluk

Central Asia and Iran, 9

1. Aq Qoyunlu
2. Golden Horde
3. Kara Koyunlu
4. Muslim conquest of Persia
5. Khwarazmian dynasty
6. Göktürks
7. Seljuq dynasty
   1. Great Seljuq Empire
8. Uyghur Khaganate

Eastern Asia, 19

1. Goryeo
2. Han Dynasty
3. Heian period
4. Jin Dynasty (265–420)
5. Jin Dynasty (1115–1234)
6. Liao Dynasty
7. Mongol Empire
8. Ninja
9. Qin Dynasty
10. Sixteen Kingdoms
11. Song Dynasty
12. Southern and Northern Dynasties
13. Sui Dynasty
14. Tang Dynasty
15. Three Kingdoms
16. Xia Dynasty
17. Yuan Dynasty
18. Five Dynasties and Ten Kingdoms period
19. Khitan people

Southern Asia, 3

1. Delhi Sultanate
2. Muslim conquest in the Indian subcontinent
3. Vijayanagara Empire

Southeastern Asia, 7

1. Champa
2. Khmer Empire
3. Majapahit
4. Malacca sultanate
5. Pagan Kingdom
6. Srivijaya
7. Trần Dynasty

Western Asia, 9

1. Abbasid Caliphate
2. Crusades
   1. Crusader states
3. Empire of Nicaea
4. Fatimid Caliphate
5. Latin Empire
6. Ottoman Empire
7. Sultanate of Rum
8. Umayyad Caliphate

Europe, 77

1. Black Death
2. East–West Schism
3. House of Habsburg
4. House of Medici
5. Normans
6. Renaissance

Eastern Europe and Central, 26

1. Cuman people
2. Eurasian Avars
3. First Bulgarian Empire
4. Second Bulgarian Empire
5. Byzantine Empire
   1. Arab–Byzantine Wars
   2. Byzantine–Bulgarian wars
   3. Byzantine–Ottoman Wars
   4. Fall of Constantinople
6. Kingdom of Galicia–Volhynia
7. Grand Duchy of Lithuania
8. Grand Duchy of Moscow
9. Kingdom of Hungary
10. Hussite Wars
11. Khazars
12. Kievan Rus'
13. Great Moravia
14. Novgorod Republic
15. Cretan War (1645–69)
16. Pechenegs
17. Teutonic Knights
18. Vladimir-Suzdal
19. Volga Bulgaria
20. Kingdom of Bohemia
21. Polish–Lithuanian–Teutonic War
22. Rurik Dynasty

Western Europe, 45

1. Al-Andalus
   1. Caliphate of Córdoba
   2. Reconquista
2. Kingdom of Aragon
3. Duchy of Burgundy
4. Kingdom of Castile
5. Francia
   1. East Francia
   2. West Francia
6. Kingdom of France
7. Carolingian Empire
   1. Capetian dynasty
   2. Carolingian dynasty
   3. Merovingian dynasty
8. Kingdom of England
   1. Anglo-Saxons
   2. Battle of Hastings
   3. Norman conquest of England
   4. Wars of the Roses
9. Hanseatic League
10. Kalmar Union
11. Holy Roman Empire
12. House of Plantagenet
13. Hundred Years' War
14. Inquisition
15. Knights Templar
16. Lombards
17. Northern Crusades
18. Ostsiedlung
19. Papal States
20. Republic of Genoa
21. Kingdom of Sicily
22. Republic of Venice
23. Viking Age
24. Vikings
25. Visigothic Kingdom
26. Austrasia
27. Franks
28. Investiture Controversy
29. Kingdom of Germany
30. Wends
31. Gothic War (535–554)
32. Guelphs and Ghibellines
33. Neustria
34. Salic law

Early modern history, 93

Basics, 11

1. Early modern period
2. Age of Discovery
3. British Empire
4. French colonial empire
5. Little Ice Age
6. Portuguese Empire
7. Spanish Empire
8. Scientific revolution
9. Seven Years' War
10. Treaty of Zaragoza
11. Treaty of Tordesillas

Africa, 9

1. African slave trade
2. Atlantic slave trade
3. Bornu Empire
4. Kingdom of Mutapa
5. Ashanti Empire
6. Kingdom of Kongo
7. Oyo Empire
8. Sennar (sultanate)
9. Hausa Kingdoms

Americas, 11

1. American Revolutionary War
2. European colonization of the Americas
   1. British colonization of the Americas
   2. Spanish colonization of the Americas
      1. Spanish conquest of the Aztec Empire
      2. Spanish conquest of the Inca Empire
3. French and Indian Wars
   1. French and Indian War
4. Wounded Knee Massacre
5. Lewis and Clark Expedition
6. Spanish American wars of independence

Asia, 23

1. 1556 Shaanxi earthquake
2. Bengal famine of 1770
3. Deccan sultanates
4. Dutch East India Company
5. East India Company
6. Edo period
   1. Tokugawa shogunate
7. Japanese invasions of Korea
8. Joseon
9. Kazakh Khanate
10. Ming Dynasty
11. Maratha Empire
12. Mughal Empire
13. Russian conquest of Siberia
14. Safavid dynasty
15. Sikh Empire
16. Ayutthaya Kingdom
17. Khanate of Bukhara
18. Lan Xang
19. Lê Dynasty
20. Khanate of Sibir
21. Taungoo Dynasty
22. Zunghar Khanate

Europe, 39

Basics, 4

1. Age of Enlightenment
2. Protestant Reformation
3. Thirty Years' War
4. Counter-Reformation

Western Europe, 16

1. 1755 Lisbon earthquake
2. Anglo-Dutch Wars
3. Congress of Berlin
4. Eighty Years' War
5. English Civil War
6. French Revolution
   1. French Revolutionary Wars
7. French Wars of Religion
8. Huguenot
9. Italian Wars
10. Prussia
11. Puritan
12. Spanish Inquisition
13. War of the Austrian Succession
14. War of the Spanish Succession
15. Enclosure

Eastern Europe and Central, 19

1. Cossacks
   1. Cossack Hetmanate
2. Crimean Khanate
3. Great Northern War
4. Great Turkish War
5. House of Romanov
6. Khanate of Kazan
7. Livonian War
8. Partitions of Poland
9. Polish–Lithuanian Commonwealth
10. The Great Game
11. Tsardom of Russia
    1. Oprichnina
12. History of the Russo-Turkish wars
13. Ottoman wars in Europe
14. Union of Lublin
15. Muscovite–Lithuanian Wars
16. Polish–Muscovite War (1605–18)
17. Russo-Polish War (1654–1667)

Modern history, 213

Basics, 46

1. Modern history
2. 1973 oil crisis
3. Abolitionism
4. Anti-Comintern Pact
5. Movements for civil rights
6. Cold War
7. Decolonization
8. Financial crisis of 2007–2008
9. Great Depression
10. Industrial Revolution
11. Information Age
12. Interwar period
13. Kellogg–Briand Pact
14. New Imperialism
15. Space exploration
16. Space Race
17. 1918 flu pandemic
18. War on Terror
19. Women's suffrage
20. World War I
    1. Balkans Campaign
    2. Eastern Front
    3. Italian Campaign
    4. Middle Eastern theatre of World War I
    5. Treaty of Lausanne
    6. Treaty of Saint-Germain-en-Laye (1919)
    7. Treaty of Trianon
    8. Western Front
    9. Paris Peace Conference
21. World War II
    1. Allies of World War II
    2. Atomic bombings of Hiroshima and Nagasaki
    3. Attack on Pearl Harbor
    4. Axis powers
    5. Battle of the Atlantic
    6. Battle of Britain
    7. Eastern Front
    8. Invasion of Poland
    9. Mediterranean, Middle East and African theatres of World War II
    10. Molotov–Ribbentrop Pact
    11. Nuremberg trials
    12. Pacific War
    13. Western Front
    14. Winter War
    15. Yalta Conference
22. Collective farming

Africa, 18

1. Arab Spring
2. Algerian War
3. Angolan Civil War
4. Anglo–Zulu War
5. Apartheid in South Africa
6. Biafra
7. Congo Free State
8. Ethiopian Civil War
9. First Boer War
10. Libyan civil war
11. Mahdist War
12. Nigerian Civil War
13. Rwandan Genocide
14. Scramble for Africa
15. Second Boer War
16. Second Congo War
17. Second Italo–Ethiopian War
18. Sokoto Caliphate

Americas, 23

1. 2010 Haiti earthquake
2. African-American Civil Rights Movement
3. American Civil War
4. American Indian Wars
5. Confederate States of America
6. Cuban missile crisis
7. Cuban revolution
8. Dust Bowl
9. Empire of Brazil
10. Gran Colombia
11. Haitian Revolution
12. Manhattan Project
13. Mexican War of Independence
14. Mexican Revolution
15. Mexican–American War
16. September 11 attacks
17. Spanish–American War
18. Wall Street Crash of 1929
19. War of 1812
20. Paraguayan War
21. War of the Pacific
22. American frontier
23. New Deal

Asia, 56

Eastern Asia, 24

1. 1931 China floods
2. 1976 Tangshan earthquake
3. 2011 Tōhoku earthquake and tsunami
   1. Fukushima nuclear disaster
4. Boxer Rebellion
5. History of the People's Republic of China
6. Chinese Civil War
7. Cultural Revolution
8. Empire of Japan
9. First Opium War
10. First Sino-Japanese War
11. Great Leap Forward
12. Great Chinese Famine
13. Korean War
14. Meiji period
15. Meiji Restoration
16. Qing Dynasty
17. Russo-Japanese War
18. Second Opium War
19. Second Sino-Japanese War
20. Taiping Rebellion
21. Tiananmen Square protests of 1989
22. Xinhai Revolution
23. Unequal treaty

Southern Asia, 9

1. 1970 Bhola cyclone
2. Bangladesh Liberation War
3. British Raj
4. Indian independence movement
5. Indian Rebellion of 1857
6. Indo-Pakistani War of 1971
7. Partition of India
8. Nguyen dynasty
9. Konbaung Dynasty

Southeastern Asia, 9

1. 2004 Indian Ocean earthquake and tsunami
2. Dutch East Indies
3. French Indochina
4. Indonesian National Revolution
5. Philippine–American War
6. Philippine Revolution
7. Vietnam War
8. Khmer Rouge
9. First Indochina War

Western Asia, 14

1. 1953 Iranian coup d'état
2. Arab–Israeli conflict
3. Armenian Genocide
4. Israeli Declaration of Independence
5. Gulf War
6. Iran–Iraq War
7. Iranian Revolution
8. Iraq War
9. Israeli–Palestinian conflict
10. Persian Constitutional Revolution
11. Soviet war in Afghanistan
12. Turkish War of Independence
13. Young Turks
14. War in Afghanistan (2001–present)

Europe, 70

Basics, 11

1. Austrian Empire
2. Austria-Hungary
3. Congress of Vienna
4. European integration
5. History of the European Union
6. The Holocaust
7. Holy Alliance
8. Iron Curtain
9. Revolutions of 1848
10. Treaty of Paris (1814)
11. Treaty of Versailles

Eastern Europe, 30

1. Balkan Wars
   1. First Balkan War
   2. Second Balkan War
2. Chernobyl disaster
3. Crimean War
4. Czechoslovakia
5. Dissolution of the Soviet Union
6. East Germany
7. French invasion of Russia
8. Great Purge
9. Greco-Turkish War (1919–22)
10. Greek War of Independence
11. Gulag
12. Holodomor
13. Hungarian Revolution of 1956
14. Polish–Soviet War
15. Prague Spring
16. Revolutions of 1989
17. Russian Civil War
18. Russian Empire
19. Revolution of 1905
20. Russian Revolution
21. Russo-Turkish War (1877–1878)
22. Solidarity (Polish trade union)
23. Eastern Bloc
24. Soviet Union
    1. Mensheviks
    2. NKVD
25. Yugoslavia
26. Population transfer in the Soviet Union

Western Europe, 29

1. Belgian Revolution
2. Berlin Wall
3. First French Empire
4. Franco-Prussian War
5. French First Republic
6. German Confederation
7. German Empire
8. German reunification
9. Great Famine (Ireland)
10. Hundred Days
11. Italian unification
12. July Revolution
13. Napoleonic Wars
14. Nazi Germany
    1. Beer Hall Putsch
    2. Gestapo
    3. Nazi Party
    4. Schutzstaffel
    5. Sturmabteilung
    6. 20 July Plot
15. Peninsular War
16. Paris Commune
17. Second Spanish Republic
18. Spanish Civil War
19. The Troubles
20. Unification of Germany
21. Nazi concentration camps
22. Weimar Republic
23. Stab-in-the-back myth

Historical cities, 1

1. Antioch

Basics, 45

1. Technology
2. Engineering
3. Artificial intelligence
4. Biotechnology
   1. Cloning
   2. Genetically modified organism
5. Genetic engineering
6. Nanotechnology
7. Nuclear technology
8. Transhumanism
9. Control engineering
10. Standardization
11. Disruptive innovation
12. Transport engineering
13. Construction engineering
14. Petroleum engineering
15. Naval architecture
16. Innovation
17. Technophobia
18. Microtechnology
19. Engineering drawing
20. Automation
21. Technological convergence
22. Science studies
23. Science, technology and society
24. High tech
25. Engineering management
26. Food engineering
27. Technological change
28. Human reliability
29. Technological determinism
30. Municipal or urban engineering
31. Earthquake engineering
32. Coastal management
33. Ceramic engineering
34. Engineering ethics
35. Agricultural engineering

Disciplines, 8

1. Aerospace engineering
2. Biomedical engineering
3. Civil engineering
4. Electrical engineering
5. Industrial engineering
6. Military engineering
7. Nuclear engineering
8. Software engineering

Agriculture, 49

Basics, 8

1. Agricultural science
2. Agronomy
3. Domestication
4. Farm
5. Farmer
6. Green Revolution
7. Selective breeding
8. Kolkhoz

Agricultural buildings and infrastructure, 5

1. Barn
2. Granary
3. Grain elevator
4. Stable
5. Greenhouse

Agricultural techniques, 12

1. Combine harvester
2. Cultivar
3. Fertilizer
4. Gardening
5. Harvest
6. Insecticide
7. Irrigation
8. Pesticide
   1. Herbicide
9. Plant breeding
10. Tillage
11. Winnowing

Livestock, 5

1. Animal husbandry
2. Beekeeping
3. Livestock
4. Breed
5. Poultry

Crops, 6

1. Garden
2. Crop
3. Cotton
4. Hemp
5. Hay
6. Weed

Methods, 12

1. Dairy
2. Extensive farming
3. Fish farming
4. Industrial agriculture
5. Intensive farming
6. Orchard
7. Organic farming
8. Permaculture
9. Sericulture
10. Subsistence agriculture
11. Sustainable agriculture
12. Urban agriculture

Policy, 1

1. Agricultural policy

Construction, 98

See also Arts>Architecture section

1. Asphalt
2. Adobe
3. Suspension bridge
4. Reinforced concrete
5. Moat
6. Mud
7. Bulldozer
8. Mortar (masonry)
9. Plaster
10. Tile
11. Building material
12. Foundation (engineering)
13. Numerical control
14. Stucco
15. Breakwater (structure)

Basics, 5

1. Building
2. Architectural engineering
3. Building code
4. Infrastructure
5. Structural engineering

Building materials, 6

1. Nail (fastener)
2. Brick
3. Cement
4. Concrete
5. Masonry
6. Scaffolding

Buildings and structures by type, 40

Architectural elements, 12

1. Arch
2. Ceiling
3. Column
4. Dome
5. Door
6. Facade
7. Floor
8. Roof
9. Room
10. Stairs
11. Wall
12. Window

Coastal construction, 3

1. Harbor
2. Lighthouse
3. Pier

Commercial buildings, 2

1. Office
2. Warehouse

Industrial buildings, 0

Residential buildings and housing units, 13

1. Apartment
2. Barracks
3. House
4. Pagoda
5. Palace
6. Penthouse apartment
7. Pyramid
8. Skyscraper
9. Tower
10. Tower block
11. Villa
12. Hut (dwelling)
13. Igloo

Rooms and spaces, 8

1. Basement
2. Bathroom
3. Bedroom
4. Dining room
5. Garage (house)
6. Kitchen
7. Living room
8. Pantry

Portable buildings and shelters, 2

1. Tent
2. Yurt

Urban studies and planning, 11

1. Urban planning
2. Urban design
3. Campus
4. City block
5. Downtown
6. Ghetto
7. Industrial park
8. Park
9. Street
10. Town square
11. Zoning

Hydraulic structure, 3

1. Dams
   1. Hoover Dam
   2. Three Gorges Dam

Transport buildings and structures, 18

1. Bridge
   1. Akashi Kaikyō Bridge
   2. Bang Na Expressway
   3. Brooklyn Bridge
   4. Fehmarn Belt Fixed Link
   5. George Washington Bridge
   6. Golden Gate Bridge
   7. Great Belt Fixed Link
   8. Hangzhou Bay Bridge
   9. Lake Pontchartrain Causeway
   10. London Bridge
   11. Øresund connection
   12. Sunshine Skyway Bridge
   13. Tower Bridge
   14. Verrazano-Narrows Bridge
2. Tunnel
   1. Channel Tunnel
   2. Seikan Tunnel

Industry, 72

1. Industrial robot
2. Mass production
3. Mechanization
4. Waste
   1. Landfill
   2. Recycling
   3. Waste management
5. Woodworking

Energy and Fuel, 25

Energy, 10

1. Geothermal electricity
2. Hydroelectricity
3. Nuclear power
4. Solar energy
5. Solar power
6. Renewable energy
7. Wind power
8. Candle
9. Windmill
10. Hydropower

Electricity generation, 6

1. Electricity generation
2. Power station
3. Cooling tower
4. Solar cell
5. Turbine
6. Wind turbine

Electric power distribution, 3

1. Electrical grid
2. Electric power transmission
3. Electric power distribution

Fuel, 6

1. Fossil fuel
2. Coal
3. Gasoline
4. Kerosene
5. Natural gas
6. Petroleum

Food and health, 17

1. Microwave oven
2. Pasteurization
3. Refrigerator
4. Soap
5. Stove
6. Scuba set
7. Vacuum flask
8. Laundry
9. Sanitation
10. Sanitary sewer
11. Sewage treatment
12. Water purification
13. Aqueduct (water supply)
14. Plumbing
15. Pumping station
16. Water tower
17. Water well

Material and chemical, 11

1. Explosive material
   1. Dynamite
2. Metallurgy
3. Plastic
4. Natural rubber
5. Adhesive
6. Ore
7. Paper
8. Papyrus
9. Lumber
10. Petrochemical

Metalworking, 11

1. Metalworking
2. Blacksmith
3. Die casting
4. Drilling
5. Extrusion
6. Laser cutting
7. Machine press
8. Quenching
9. Rolling (metalworking)
10. Soldering
11. Welding

Machinery and tools, 89

Basics, 20

1. Mechanical engineering
2. Machine
3. Centrifuge
4. Engine
   1. Electric motor
   2. Internal combustion engine
   3. Jet engine
   4. Steam engine
5. Robot
6. Simple machine
   1. Inclined plane
   2. Lever
   3. Pulley
   4. Screw
   5. Wedge (mechanical device)
   6. Wheel
   7. Wheel and axle
7. Robotics
8. System
9. Crane (machine)

Components, 21

1. Axle
2. Bearing (mechanical)
3. Clutch
4. Gear
5. Worm drive
6. Cable
7. Chain
8. Rope
9. Net (textile)
10. Twine
11. Fastener
12. Nut (hardware)
13. Knot
14. Rivet
15. Washer (hardware)
16. Kinematic pair
17. Lock (device)
18. Key (lock)
19. Pipe (fluid conveyance)
20. Gasket
21. Spring

Machinery, 17

1. Chainsaw
2. Cotton gin
3. Cultivator
4. Irrigation sprinkler
5. Lawn mower
6. Sewing machine
7. Tractor
8. Air conditioning
9. Clothes dryer
10. Coffeemaker
11. Dishwasher
12. Oven
13. Sink
14. Electric stove
15. Toilet
16. Vacuum cleaner
17. Washing machine

Tools, 31

1. Tool
2. Archimedes' screw
3. Axe
4. Hammer
5. Saw
6. Chisel
7. Clamp (tool)
8. Lathe
9. Plane (tool)
10. Sandpaper
11. Scissors
12. Screwdriver
13. Broom
14. Ruler
15. Ladder
16. Toothbrush
17. Drill
18. Anvil
19. Clothes iron
20. Eraser

Garden tools, 11

1. Harrow (tool)
2. Hoe (tool)
3. Machete
4. Pitchfork
5. Plough
6. Rake (tool)
7. Roller (agricultural tool)
8. Scythe
9. Sickle
10. Shovel
11. Watering can

Optical, 30

1. Camera
2. Glasses
3. Laser
4. Lens (optics)
5. Microscope
6. Prism (optics)
7. Telescope
8. Holography
9. Optical fiber
10. Photodetector
11. Optical illusion
12. Albedo
13. Depth of field
14. Photodiode
15. Camera obscura
16. Periscope

Optics, 9

1. Anti-reflective coating
2. Diffraction grating
3. Focal length
4. Focus (optics)
5. Fresnel lens
6. Mirror
7. Polarizer
8. Rayleigh scattering
9. Dispersion (optics)

Optical instrument, 5

1. Binoculars
2. Interferometry
3. Catadioptric system
4. Reflecting telescope
5. Refracting telescope

Electronics, 39

1. Electronics
2. Alternating current
3. Amplifier
   1. Operational amplifier
4. Circuit design
5. Direct current
6. Electronic amplifier
7. Oscilloscope
8. Relay
9. Signal processing
10. Mechatronics

Components, 28

1. Electronic component
2. Antenna
3. Battery (electricity)
4. Capacitor
5. Diode
   1. Light-emitting diode
6. Flat panel display
7. Incandescent light bulb
8. Inductor
9. Integrated circuit
10. Cavity magnetron
11. Resistor
12. Semiconductor
13. Transformer
14. Transistor
15. Vacuum tube
16. Waveguide
17. Cathode ray tube
18. Printed circuit board
19. Electrical connector
20. Loudspeaker
21. Power supply
22. Switch
23. Circuit breaker
24. Fuse (electrical)
25. Wire
26. Flip-flop (electronics)
27. Thyristor

Navigation and timekeeping, 20

1. Atomic clock
2. Celestial navigation
3. Clock
4. Compass
5. Dead reckoning
6. Global Positioning System (GPS)
7. Gyroscope
8. Pendulum
9. Radar
10. Sonar
11. Sundial
12. Navigation
13. Sextant
14. Watch
15. Azimuth
16. Sidereal time
17. Astrolabe
18. Water clock
19. Satellite navigation
20. Hourglass

Information technology, 89

Basic, 7

1. Information technology
2. Abacus
3. Calculator
4. Computing
5. Data (computing)
6. Expert system
7. Internationalization and localization

Computer science, 17

1. Computer science
2. Algorithm
3. Compiler
4. Data compression
5. [Data structure]]
6. Error detection and correction
7. Numerical integration
8. Search engine (computing)

Cryptography, 4

1. Cryptography
2. Authentication
3. Encryption
4. Password

Programming, 5

1. Computer programming
2. Programming paradigm
3. Functional programming
4. dObject-oriented programming
5. Structured programming

Computer hardware, 17

1. Computer
2. Booting
3. Compact Disc
4. ENIAC
5. Hard disk drive
6. Motherboard
7. Central processing unit
8. Random-access memory
   1. Dynamic random-access memory
9. Read-only memory
10. Peripheral

User interface, 6

1. User interface
2. Computer keyboard
3. Computer monitor
   1. Liquid crystal display
4. Mouse (computing)
5. Touchscreen

Computer software, 34

1. Software
2. Computer program
3. Computer virus
4. Database
   1. Data warehouse
5. Graphical user interface
6. Open source software
7. Spreadsheet
8. Word processor
9. Web browser
10. Virtual reality

Operating systems, 9

1. Operating system
2. Berkeley Software Distribution
3. Linux
4. Mac OS
5. Microsoft Windows
6. MS-DOS
7. Multics
8. OpenVMS
9. Unix

Programming languages, 14

1. Programming language
2. Ada (programming language)
3. Assembly language
4. BASIC
5. C (programming language)
6. C++
7. COBOL
8. Fortran
9. Java (programming language)
10. JavaScript
11. Lisp (programming language)
12. PHP
13. Python (programming language)
14. SQL

Networks, 14

1. Computer network
2. Ethernet
3. Router (computing)
4. Wi-Fi

Internet, 10

1. Internet
2. Email
3. Transmission Control Protocol
4. World Wide Web
5. Hypertext Transfer Protocol
6. HTML
7. Internet protocol suite
8. Web search engine
9. Website
10. Wiki

Media and communication, 40

1. Broadcasting
2. Microphone
3. Mobile phone
4. Photography
5. Printing
   1. Printer
   2. Printing press
6. Publishing
7. Radio
8. Telecommunication
9. telegraphy
10. Telephone
11. Television
    1. Cable television
12. Typewriter
13. Video
    1. Videotape
14. Communications satellite
15. Data storage device
16. Floppy disk
17. Magnetic tape
18. Memory card
19. Optical disc
20. Mail
21. Courier
22. Postage stamp
23. Mobile device
24. Photocopier
25. Amateur radio
26. Radio broadcasting station
27. Social media
28. Blog
29. Sound recording and reproduction
30. Speech synthesis
31. Coding theory
32. Data transmission
33. Forward error correction
34. Modulation
35. Satellite television
36. Video camera
37. Video game console

Space, 45

1. Atacama Large Millimeter Array
2. European Space Agency
3. Great Observatories program
4. Herschel Space Observatory
5. Hubble Space Telescope
6. International Space Station
7. James Webb Space Telescope
8. Moon landing
9. NASA
10. Apollo program
    1. Apollo 11
11. Rocket
12. Satellite
13. Soyuz (spacecraft)
14. Spaceflight
15. Space Shuttle
16. Space station
17. Spitzer Space Telescope
18. Very Large Telescope
19. Wilkinson Microwave Anisotropy Probe
20. Astronaut
21. Launch pad
22. Launch vehicle
23. Rocket engine
24. Space capsule
25. Space probe
26. Space suit
27. Baikonur Cosmodrome
28. China National Space Administration
29. Japan Aerospace Exploration Agency
30. Kennedy Space Center
31. Geosynchronous orbit
32. Sputnik 1
33. Voyager 1
34. Proton (rocket family)
35. Saturn V
36. Cerro Tololo Inter-American Observatory
37. Mauna Kea Observatories
38. Mount Wilson Observatory
39. Palomar Observatory
40. Jet Propulsion Laboratory
41. Ion thruster
42. Astronautics
43. Vostok programme
    1. Vostok 1

Textiles, 3

Fibers and fabrics, 3

1. Leather
2. Silk
3. Wool

Transportation, 100

Basics, 13

1. Cargo
2. Conveyor belt
3. Elevator/Lift
4. Escalator
5. Intermodal container
6. Logistics
7. Passenger
8. Pipeline transport
9. Public transport
10. Rush hour
11. Transport
12. Travel
13. Vehicle

Aviation, 19

1. Airbus
2. Aircraft
3. Airline
4. Airliner
5. Airplane
6. Airport
7. Airship
8. Aviation
9. Balloon (aircraft)
10. Bombardier Aerospace
11. Boeing
12. Cargo aircraft
13. Embraer
14. Hartsfield–Jackson Atlanta International Airport
15. Helicopter
16. Kite
17. Parachute
18. Tupolev
19. Unmanned aerial vehicle

Naval transport, 17

1. Barge
2. Boat
3. Canoe
4. Caravel
5. Container ship
6. Cruise ship
7. Ferry
8. Hovercraft
9. Junk (ship)
10. Port
11. Raft
12. Rowing
13. Sail
14. Sailing
15. Ship
16. Tanker (ship)
17. Watercraft

Ground transport, 51

Rail transport, 16

1. Express train
2. dLocomotive
   1. Steam locomotive
3. London Underground
4. Maglev train
5. Moscow Metro
6. New York City Subway
7. Paris Métro
8. Rail transportation
9. Railway signal
10. Railway system
11. Train
12. Train station
13. Trans-Siberian Railway
14. Tram
15. Subterranean rapid transit (subway)

Road transport, 35

1. Auto rickshaw
2. Bicycle
3. Bus
   1. Trolleybus
4. Bus station
5. Carriage
6. Motorcycle
7. Road
   1. Controlled-access highway
8. Saddle
9. Stirrup
10. Traffic
11. Traffic accident
12. Traffic sign
13. Trail
14. Truck
15. Van

Automobile, 18

1. Automobile (car)
2. Automotive industry
3. Electric car
4. Taxicab

Groups, 10

1. Ford Motor Company
2. General Motors
3. Honda
4. Hyundai Motor Company
5. Nissan Motor Company
6. PSA Peugeot Citroën
7. Renault
8. Suzuki
9. Toyota
10. Volkswagen

Car models, 4

1. Ford Model T
2. Volkswagen Beetle
3. Toyota Corolla
4. VAZ-2101

Weapons, 80

1. Weapon
2. Chariot
3. Stealth technology
4. Tank
5. Torpedo
6. War elephant

Ammunition, 6

1. Ammunition
2. Cartridge (firearms)
3. Gunpowder
4. Arrow
5. Bullet
   1. Caliber

Armour, 7

1. Armour
2. Bulletproof vest
3. Combat helmet
4. Helmet
5. Mail (armour)
6. Plate armour
7. Shield

Explosive weapons, 6

1. Bomb
2. Cluster munition
3. Improvised explosive device
4. Hand grenade
5. Land mine
6. Missile

Incendiary weapons, 3

1. Greek fire
2. Molotov cocktail
3. Napalm

Melee weapons, 13

1. Nunchaku

Blade weapons, 11

1. Bayonet
2. Battle axe
3. Dagger
4. Épée
5. Katana
6. Knife
7. Rapier
8. Sabre
9. Spear
10. Sword
11. Tomahawk (axe)

Blunt weapons, 1

1. Club (weapon)

Firearm, 12

1. Firearm
2. Assault rifle
   1. AK-47
3. Handgun
4. Machine gun
   1. Uzi
5. Rifle

Artillery, 5

1. Artillery
2. Battering ram
3. Cannon
4. Howitzer
5. Mortar (weapon)

Military aviation, 4

1. Military aircraft
2. Bomber
3. Fighter aircraft
4. Attack aircraft

Naval warfare, 10

1. Battleship
2. Aircraft carrier
3. Dreadnought
4. Dromon
5. Galley
6. Submarine
7. Capital ship
8. Ship of the line
9. Trireme
10. Warship

Projectile weapons, 8

1. Ballista
2. Boomerang
3. Bow and arrow
4. Catapult
5. Crossbow
6. Musket
7. Shotgun
8. Sling (weapon)

Weapon of mass destruction, 5

1. Weapon of mass destruction
2. Biological warfare
3. Chemical weapon
4. Nuclear weapon
   1. Thermonuclear weapon