Thematic classification
  new
    About.com's Classification
    Barlett-Roget's classification
    Britannica's classification (11th ed.)
    Britannica's classification (15th ed.)
    Britannica.com's classification
    Dewey Decimal classification
    Descriptionary classification
    Encarta's classification
    Encyclopedie francaise' classification
    Eurasia's classification
    Grolier's classification
    Guiness Book of Answer's classification
    Guiness Encyclopedia's classification
    Hutchinson Encyclopedia's classification
    Inside Information's classification
    Joel Jones' classification
    Joint's classification
    Joy of Knowledge's classification
    Library of Congress classification
    Lo's list classification
    Macmillan Desk Reference's classification
    McArthur's classification
    NYPL Desk Reference's classification
    Open Directory dmoz.org's classification
    Random House Electronic Encyclopedia's classification
    Random House Encyclopedia's classification
    Random House Word Menu's classification
    Roget's classification (1st ed.)
    Roget's classification (4th ed.)
    Roget's classification (5th ed.)
    Stibb's classification
    Universal Decimal Classification
    Yahoo.com's classification
  old
    Aelfric's classification
    Al-Khwarizmi's science classification
    An-Nuwairi's classification
    Aquinas' theological classification
    Bacon's classification
    Bacon's classification of knowledge
    Coleridge's classification
    Comenius' classification
    De Beauvais' classification
    Isidore's classification
    Martini's classification of knowledge
    Pliny's Historia Naturalis classification
    Wilkins' classification
  visual
    Duden's visual classification
    Stoddart's visual classification
    What's What's visual classification


About.com's Classification

Arts/Humanities
  books/authors
  history
  performing arts
  visual arts/design
  writing/publishing
Autos
Cities/Towns
Comedy
Computing/Technology
  communication/networks
  hardware
  operating systems
  programming
  software
  tech biz/careers
Cultures
  africa/mideast
  americas
  asia/pacific
  europe
  languages
Education
  adult/continuing education
  college/university
  primary/secondary education
Food/Drink
  cooking: general
  drinks/beverages
  world/regional cuisine
Gadgets
Games
  electronic games
  games-general
Health/Fitness
  alternative/complementary medicine
  disabilities
  diseases/conditions
  fitness/wellness
  medicine/allied health
  mental health
  recovery/addiction
  women's health
Hobbies
  arts/crafts
  collecting
  pastimes
Home/Garden
  crafts
  design/living
  gardening
  repair/renovate
Homework Help
  arts
  history
  languages
  literature
  philosophy/religion
  sciences
  social studies
  study skills/tools
Industry
  communication/networks
  computing
  energy/environment
  food service
  government
  health/biotech
  logistics/transportation
  manufacturing
  metals/materials
  other industries
  retail sector
Internet/Online
  career planning/job searching
  careers: business/finance
  careers: media/arts
  careers: nonprofit/government/education
  careers: science/technology
Jobs/Careers
Kids
Money
  manage your money
  markets/investing
  worldwide finance
Movies
Music/Performing Arts
  audio/visual
  music
  performing arts
News/Issues
  government
  issues/causes
  media
  news
  politics
Parenting/Family
  family life
  family/parenting partners
  parenting
People/Relationships
  dating/relationships
  gay/lesbian/bisexual
  seniors
Pets
Real Estate
Recreation Outdoors
Religion/Spirituality
Science
  alternative science
  applied science/engineering
  computer science
  earth science
  life science
  physical science/math
  social science
Shopping
  autos
  collecting
  computing/gadgets
  entertainment
  real estate
  savvy shopping
  style
  travel
Small Business
Sports
Style
  at home
  beauty/health
  entertaining/events
  fashion
Teens
Travel
  africa/asia
  australia/new zealand/south pacific
  canada/u.s.
  caribbean/latin america
  europe
  getaways/vacations
  recreation/outdoors
TV/Radio
  radio
  soaps
  tv interational
  tv scehdules
  tv shows
  video/tv equipment


Aelfric's classification

God, heaven, angels, sun, moon, earth, sea
man, woman, the parts of the body
kinship, professional and trades people, artisans
diseases
abstract terms
times of the year and day, seasons, the weather
colours
birds
fishes
beasts
herbs
trees
house furnishings
kitchen and cooking utensils
weapons
parts of a city
metals and precious stones
general terms (abstract and concrete)


Al-Khwarizmi's science classification

the indigenous sciences
  Quranic jurisprudence
  theological philosophy
  Arabic grammar
  secretarial duties
  poetry and prosody
  history
the foreign sciences
  philosophy
  logic
  medicine
  arithmetic
  geometry
  astronomy
  music
  mechanics
  alchemy


An-Nuwairi's classification

geography, geology, meteorology, astronomy, chronology
humanity - it's anatomy, folklore, conduct and politics
zoology
botany
history


Aquinas' theological classification

theology, God, the Trinity, the Creation, angels, cosmogony, man, human
  intelligence, divine government, and world order
the human race, morality, emotion, virtue, sin, law, and grace; faith,
  hope, charity, mysticism and miracles, and the religious life
the Incarnate Word, Christ, meditation, the Virgin Mary, the Passion and
  Resurrection, the sacraments and penance


Bacon's classification

external nature
  astronomy
  meteorology
  geography
  minerals
  plants
  animals
man
  anatomy
  physiology
  powers
  actions
man acting upon nature
  medicine
  chemistry
  the visual arts
  the senses
  the emotions
  the intellect
  architecture
  transport
  printing
  agriculture
  navigation
  arithmetic
  ...


Bacon's classification of knowledge

history
  natural
  civil
    ecclesiastical
    literary
poetry
  narrative
  dramatic
  parabolic
theology
  God
  nature
  man
    human philosophy
      body
        medicinal arts
        cosmetic arts
        athletic arts
        voluptuary arts
      soul
    civil philosophy
philosophy
  speculative
    physics
    metaphysics
  mathematics
    speculative
    pure
    mixed
    practical
  practical
    mechanics
    magic


Barlett-Roget's classification

foundation of knowledge
living things
social structure
human relations
belief systems
provision
health and well-being
occupations and crafts
the arts
sports and enjoyments
communications
the senses
feelings
the intellect and ideas
will and behavior
negotiations and fiscal relations
power
material characteristics
spatial relations
shape
time
motion
abstract relations
condition


Britannica's classification (11th ed.)

anthropology, ethnology
archaeology, antiquities
art
astronomy
biology
chemistry
economics, social science
education
engineering
geography
geology
history
industries, manufactures, occupations
language, writing
law, political science
literature
mathematics
medical science
military, naval
philosophy, psychology
physics
religion, theology
sports, pastimes
miscellaneous


Britannica's classification (15th ed.)

matter and energy
  atoms, elementary particles
  energy, radiation
  universe
the earth
  property, structure, composition
  atmosphere, hydrosphere
  surface
  history
life on earth
  nature and diversity
  molecular basis of life
  structure and function of organisms
  behavioral response of organisms
  biosphere
human life
  stages in development
  health and disease
  behavior and experience
human society
  people and culture
  social organization and social change
  production, distribution, and utilization of wealth
  politics and government
  law
  education
art
  general
  particular
technology
  nature and development of technology
  elements of technology
  fields of technology
religion
  general
  particular
the history of mankind
  people and civilization of ancient SW Asia, N Africa, and Europe
  people and civilization of medieval SW Asia, N Africa, and Europe
  people and traditional civilization of E, central, S, and SE Asia
  people and civilization of sub-Saharan Africa to 1885
  people and civilization of pre-Columbian America
  modern world to 1920
  world since 1920
the branches of knowledge
  logic
  mathematics
  science
  history and humanities
  philosophy


Britannica.com's classification

arts
  film & tv
  music
  performing arts
  style
  visual arts
books
  biography
  children's books
  fiction
  mystery
  nonfiction
  poetry
  science fiction
  writing
business
  consumer issues
  economics
  international
  investing
  taxes
  workplace
education
  alternative
  college & university
  distance learning
  early childhood
  primary & secondary
  special education
  world education
health
  aging
  children's health
  health care
  humany body
  illness & injury
  men's health
  mental health
  nutrition & diet
  physical fitness
  women's health
history
  military history
  people
  periods
  places
  race & ethnicity
  U.S. history
  women's history
philosophy
  classical philosophy
  contemporary ideas
  ethics
  history of philosophy
  logic
  political philosophy
politics
  governments
  law
  NGOs
  political parties
  political science
  world affairs
religion
  ancient religions
  buddhism
  christianity
  eastern religions
  hinduism
  indigenous religions
  islam
  judaism
  mythology
  new movements
science
  biology
  chemistry
  earth
  history of science
  math
  natural history
  physics
  space
society
  cultures & groups
  gender & sexuality
  popular culture
  relationships
  social issues
  social sciences
sports
  auto racing
  baseball
  basketball
  football
  golf
  ice hockey
  olympics
  soccer
  tennis
technology
  business technology
  computer science
  digital culture
  engineering
  internet
  inventions
  personal technology
travel
  accomodations
  adventure travel
  attractions
  destinations
  specialty travel
  transportation
  travel planning
world
  africa
  americas
  antarctica
  asia
  australia & oceania
  europe
  middle east
  oceans & seas


Coleridge's classification

pure science
  formal
    philosophy
    logic
    mathematics
  real
    metaphysics
    morals
    theology
mixed and applied science
  mixed
    mechanics
    hydrostatics
    pneumatics
    optics
    astronomy
  applied
    experimental philosophy
    fine arts
    useful arts
    natural history
    applications of natural history
biography and history
misc., lexicography, gazateer, philosophical and etymological lexicon
analytic index


Comenius' classification

the origin of the world
the elements, the firmament, fire and meteors
waters, earths, stones, metals
trees, fruits, herbs, shrubs
animals
man and his body
the qualities or accidents of the body
diseases, ulcers and wounds
the senses (external and internal)
mind, the will and the affections (emotions)
the mechanical arts
the house and its parts
marriage and the family
civic and state economy
grammar, dialectic, rhetoric
arithmetic and geometry
ethics
games
death and burial
Providence, God and the angels


De Beauvais' classification

speculum naturale ('the mirror of nature')
  God, angels and devils, man, the creation, and natural history
speculum doctrinale ('the mirror of learning')
  grammar, logic, ethics, medicine, crafts, etc.
speculum historiale ('the mirror of history')
  a summary of the first two divisions and a history of the world


Descriptionary classification

environment
animals
human body and mind
architecture
art
music
the performing arts and broadcasting
sports
transportation
the law
medicine
finance
the military
other occupations
language
modern religions
ancient religions
clothing
weapons
food and drink
hand tools
electronics


Dewey Decimal classification

000 generalities
  010 bibliographies
  020 library & information science
  030 general encyclopedic works
  040
  050 general serial publications
  060 general organization & mueseology
  070 journalism, publishing, newspapers
  080 general collection
  090 manuscripts & rarities
100 philosophy & aesthetics
  110 metaphysics
  120 epistemology, causation, human kind
  130 paranormal phenomena & arts
  140 specific philosophical viewpoints
  150 psychology
  160 logic
  170 ethics (moral philosophy)
  180 ancient, medieval, Oriental
  190 modern western philosophy
200 religions
  210 natural religion
  220 bible
  230 christian theology
  240 christian moral & devotional
  220 local church & religious orders
  260 social & ecclesiastical theology
  270 history & geography of church
  280 christian denomination & sects
  290 other & comparative religions
300 social science
  310 statistics
  320 political science
  330 economics
  340 law
  350 public administration
  360 social problems & services
  370 education
  380 commerce (trade)
  330 customs, etiquette, folklore
400 linguistics and languages
  410 linguistics
  420 English & Anglo-Saxon languages
  430 Germanic languages   German
  440 Romance languages   French
  450 Italian, Romanian Rhaeto-Romanic
  460 Spanish & Portuguese languages
  470 Italic languages   Latin
  480 Hellenic   classical Greek
  490 other languages
500 pure sciences
  510 mathematics
  520 astronomy
  530 physics
  540 chemistry
  550 science of earth & other worlds
  560 paleontology, paleozoology
  570 life sciences
  580 botanical sciences
  590 zoological sciences
600 technology (applied sciences)
  610 medical sciences   medicine
  620 engineering
  630 agriculture
  640 home economics & family living
  650 management & auxiliary services
  660 chemical technology
  670 manufactures
  680 manufacturing for specific uses
  690 buildings
700 the arts and recreation
  710 civic & landscape art
  720 architecture
  730 plastic arts, sculpture
  740 drawing, decorative, & minor arts
  750 painting & paintings
  760 graphic arts, prints
  770 photography & photographs
  780 music
  790 recreational & performing arts
800 literature
  810 American literature in English
  820 English & Anglo-Saxon literature
  830 literature of Germanic languages
  840 literature of Romance languages
  850 Italian, Romanian, Rhaeto-Romanic
  860 Spanish & Portuguese literature
  870 Italic literature   Latin
  880 Hellenic literature   Greek
  890 literature of other languages
900 geography, biography and history
  910 general geography   travel
  920 general biography & genealogy
  930 general history of ancient world
  940 general history of Europe
  950 general history of Asia
  960 general history of Africa
  970 general history of North America
  980 general history of South America
  990 general history of other areas


Duden's visual classification

atom, universe, earth
man and home
horticulture, agriculture, forestry
hunting and fishing
crafts and trade
industry
printing and allied trades
transport and communications
office, bank, and stock exchange
state and city
travel and recreation
sport
entertainment and music
science, religion and art
animals and plants


Encarta's classification

physical science & technology
  mathematics
  physics
  chemistry
  earth science
  paleontology
  atronomy & space science
  time, weights, & measures
  transportation
  communications
  computer science & electronics
  machines & tools
  construction & engineering
  industry, mining, & fuels
  military technology
  people in physical science
life science
  biological principles & concepts
  viruses, monerans, & protists
  algae & fungi
  plants
  invertebrate animals
  mammals
  birds
  fish
  reptiles & amphibibans
  anatomy & physiology
  medicine
  environment
  agriculture, foodstuffs, & livestock
  people in life science
geography
  countries
  mountain ranges, peaks, & landforms
  rivers, lakes, & waterways
  oceans & seas
  islands
  U.S. states, territories, & regions
  Canadian provinces, territories, & cities
  regions of the world
  U.S. cities, towns, & villages
  world cities, towns, & villages
  parks & monuments
  maps & map making
  exploration & explorers
history
  united states history
  people in u.s. history
  European history
  people in European history
  history of Asia & Australasia
  African history
  history of the Americas
  ancient history
  world history & concepts
social science
  sociology and social reform
  anthropology
  archaeology
  econmics & business
  political science
  education
  psychology
  law
  organizations
  institutions
  military
  calendar holidays, & festivals
religion & philosophy
  religions & religious groups
  scripture
  theology & practices
  religious figures
  philosophy
  mythology
  the occult
art, language, & literature
  artists
  architecture
  painting, drawing, & graphic arts
  sculpture
  photography
  decorative arts
  periods & styles
  national & regional art
  language
  writers & poets
  literature & writing
  national & regional literature
  legends & folklore
performing arts
  music
  musical instruments
  musicians & composers
  dance
  theater
  cinema, television, & broadcasting
sports, games, hobbies, & pets
  sports
  sports figures
  games, hobbies, & recreation
  pets


Encyclopedie francaise' classification

mans mental tools: logic, language, mathematics
physics
heaven and earth
life
living beings
human beings
human species
study of the mind
economic and social universe
the state
international life
chemical science and industry
industry and agriculture
man's daily life
education and learning theory
arts and literature
the written word
philosophy and religion
the world and its development: history, evolution, prospects


Eurasia's classification

human life
  body
  mind
life necessitites
  life suporting necessities
  propagation of human life
stages of life
  birth
  maturation and old age
  disorders
  death
human environment
  natural environment
  social environment
human activities
  scientific research
  agricultural and industrial construction
  commerce
  economic reconstruction and international trade
  treasury and finance
  insurance
  political activities
  wars
  people's roles in society
human knowledge
  general works and references
  philosophy
  religions
  social sciences
  language
  natural sciences
  applied sciences or technology
  the arts
  literature
  geography and history


Grolier's classification

geography
  geography and cartography
  continents and major areas
  countries, colonies, territories
  states, provinces, regions
  cities of the world
  landforms & bodies of water
  national parks and monuments
  peoples of the world
  explorers and exploration
history
  U.S. history
  European history
  Asia & Oceania
  Americas
  Africa
  Military history and military leaders
language & literature
  language & linguistics
  literature, general topics
  national & regional literatures
  nonfiction
  nonfiction writers
  novels & novellas
  novelists
  poetry and drama
  poets and dramatists
  print media
  publishers, editors, journalists
  epic, folk tales, children's lit
life sciences
  general biologoy and zoology
  plants & plant life
  invertebrates
  amphibians & reptiles
  fish
  birds
  mammals
  domesticated animals
  human body
  medicine & health
  notable figures in life sciences
  organizations & institutions
performing arts
  music & opera
  musicians, composers, singers
  dance
  dancers, choreographers, etc.
  dram, theater arts, comedy
  stage actors & other notables
  film
  film actor & other notables
  television & radio
  tv & radio notable figures
  other genres & artists
physical sciences and math
  science, general topics
  chemistry
  chemists
  physics
  physicists
  astronomy & space science
  astronomers & astrophysicists
  earth & environmental science
  earth & environmental scientists
  mathematics
  mathematicians
  organizations & institutions
society and social sciences
  anthropology & archaeology
  religion & religious figures
  philosophy & philosophers
  psychology & psychologists
  sociology & sociologists
  government, politics, social reform
  law, lawyers, jurists
  economics, business, labor
  education & educators
  holidays & observances
sports, games, recreation
  games, hobbies, pastimes
  baseball & baseball players
  football & football players
  basketball & basketball players
  track & field and notable athletes
  tennis & tennis players
  golf & golfers
  boxing & boxers
  other sports & sports figures
technology
  technology, general topics
  industry & manufacturing
  engineering & construction
  tools, machines, instruments
  materials
  agriculture, fishing, food
  transportation
  energy & power
  communication & electronics
  space exploration
  military technology
  notable figures in technology
visual arts
  visual arts, general topics
  painting, drawing, graphic arts
  painters & graphic artists
  sculpture
  sculptors
  architecture
  architects
  photography
  photographers
  design & decorative arts
  designers & decorative artists


Guiness Book of Answer's classification

the earth
geology
meteorology
astronomy
the calendar
the plant world
the animal world
the human world
medicine
language
literature
philosophy
religion
painting and sculpture
architecture
music and dance
the cinema
the theatre
sport
metrology
mathematics
computers
inventions
chemistry
physics
transport
spaceflight
defence
economics
countries of the world


Guiness Encyclopedia's classification

the nature of the universe
the restless Earth
the living planet
the human organism
the world today
technology and industry
a history of the world
religion and philosophy
the visual arts
music and dance
language and literature
countries of the world


Hutchinson Encyclopedia's classification

society
  history
  economics
  education
  language
  philosophy
  politics and government
  psychology
  religion and mythology
  resources
  sociology
  sports
  women in society
the arts
  visual arts
  architecture
  cinema
  photography
  literature
  theatre
  music and dance
science and technology
  astronomy
  computing
  earth sciences
  life sciences
  medicine
  physics
  chemistry
  mathematics
  technology


Inside Information's classification

nature
  human body
    anatomy
    medical problems
    fitness, enhancement and nutrition
    grooming and hairstyles
    physical appearance
  living things
    biology
    animals
    plants
  earth
    geology
    geography
    minerals, metals and rocks
    landscapes and seascapes
    weather and natural phenomena
science and technology
  physical science
    physics
    chemistry
    astronomy and space science
    mathematics
    medicine
  building blocks and working parts
    machinery and fabrication
    structural components
    tools and hardware
    containers
    building and construction materials
    weapons and armaments
    computers
    electricity and electronics
  transportation
    aircraft
    automobiles
    nautical
    railroads
    vehicles
domestic life
  the home
    buildings
    housing: exterior structure
    housing: interior structure
    furnishings
    housing: ornaments and accessories
    clothing: outer garments
    clothing: undergarments
    clothing: ornaments and accessories
    clothing material
    footwear
    hats, headgear and hairpieces
    fashion and garment parts
  the family
    kinship and family relations
    marriage and divorce
    parents and children
  eating
    eating verbs
    foods
    cooking and cuisine
    the kitchen
  leisure
    hobbies and crafts
    holidays, celebrations and vacations
    drinking and intoxication
    tobacco and smoking
    gardening
institutions
  society at large
    the city
    government
    politics
    law
    war and military
    international relations
    education
    publishing and journalism
    communications
    sociology
    psychology
  the economy
    business and economics
    finance
    agriculture
    advertising
    insurance
    real estate
    occupations
arts and entertainment
  the arts
    music
    musical instruments
    dance
    theater
    literature
    painting and graphic art
    sculpture and ceramics
    architecture
    photography
    colors
  pop culture
    entertainments and spectacles
    cinema
    television and radio
    pop music
    sports, games and toys
    major sports and games
language
  structure and usage
    grammar, phonetics and linguistics
    rhetoric and figures of speech
    verbs of motion
    verbs of sight
    qualifiers
    latin words and phrases
    titles of rank
    abbreviations
  speech
    verbs of speech
    sounds and noises
    exclamations
    greetings and farewells
    nonsense, confusion and trouble
    insults, slurs and epithets
    terms of endearment and repsect
    yiddish slang
the human condition
  character
    attributes of personality and behavior
    sex, love and romance
  cognition
    philosophy
    verbs of thought
    reasoning and intuition
    judgment and critcism
    time
    spatial positions and relations
    shapes
  the dark side
    crime
    intrigue, deception and strategy
    drugs and drug abuse
    insanity and mental states
    magic and the occult
    violence
    death
  faith
    religion
    mythology and folklore
    eschatology
    truth, wisdom and spiritual attainment


Isidore's classification

liberal arts
medicine
law
history
the Bible
the Church
people
language
statecraft
a Latin dictionary
man
zoology
heaven
air
seas and oceans
geography
cities and towns
building
geology
weights and measurements
agriculture
ships
houses
dress and costume
food and drink
tools
furniture


Joel Jones' classification

Matter and Energy
  Atoms: Atomic Nuclei and Elementary Particles
  Energy, Radiation, and the States and Transformation of Matter
  The Universe: Galaxies, Stars, and the Solar System
The Earth
  The Earth's Properties, Structure, and Composition
  The Earth's Envelope: Its Atmosphere and Hydrosphere
  The Earth's Surface Features
  The Earth's History
Life on Earth
  The Nature and Diversity of Living Things
  The Molecular Basis of Vital Processes
  The Structures and Functions of Organisms
  Behavioral Responses of Organisms
  The Biosphere: the World of Living Things
Human Life
  Stages in the Development of Human Life on Earth
  The Human Organism: Health and Disease
  Human Behavior and Experience
Human Society
  Social Groups: Peoples and Cultures
  Social Organization and Social Change
  The Production, Distribution, and Utilization of Wealth
  Politics and Government
  Law
  Education
Art
  Art in General
  The Particular Arts
Technology
  The Nature and Development of Technology
  Elements of Technology
  Major Fields of Technology
Religion
  Religion in General
  The Particular Religions
The History of Mankind
  Peoples and Civilizations of Ancient Southwest Asia, North Africa, and Europe
  Peoples and Civilizations of Medieval Europe, North Africa, and Southwest Asia
  Peoples and Traditional Civilizations of East, Central, South, and Southeast Asia
  Peoples  and Civilizations of Sub-Saharan Africa to  1885
  Peoples and Civilizations of Pre-Columbian America
  The Modern World to 1920
  The World Since 1920
The Branches of Knowledge
  Logic
  Mathematics
  Science
  History and the Humanities
  Philosophy


Joint's classification

popular science and technology
  mathematics
  physics
  chemistry
  astronomy
  meteorology
  geonomy (geology)
  seismolgy
  oceanography
  theory of evolution
  cytology
  genetics
  genetic engineering
  microbiology
  parasitology
  histology
  embryology
  botany
  plant physiology
  zoology
  animal kingdom
  ecology
  biochemistry
  biophysics
  archaeology
  space technology
  environmental science
  miniaturization
  photography
culture, education and health
  culture
  education
  press and publishing
  physical culture
  medical treatment and public health
finance, commerce and service industry
  finance
  banking
  commerce
  wares of commerce
  food market
  the restaurant industry
  the service industry
  foreign trade
industry, transport and communications
  general
  iron and steel
  petroleum
  petrochemicals
  chemicals
  coal
  power
  machinery
  shipbuilding
  electronics
  building construction
  timber processing
  textiles
  rubber
  plastics
  glass
  paper
  printing
  sugar
  food processing
  ceramics
  arts and crafts
  civil aviation
  railway transport
  road transport
  shipping
  post and telegraph
  radio and television
agriculture
  rural people's commune
  agricultural meterology
  soil
  fertilizer
  water conservation
  seed selection and breeding
  tillage and planting
  agricultural machinery and farm implements
  crop plant protection
  cereal crops
  oil crops
  sugar crops
  beverage crops
  spice crops
  tobacco production
  vegetables
  fruit crops
  fibre crops
  rubber production
  forestry
  animal husbandry
  side-line occupations
  fishery


Joy of Knowledge's classification

science and the universe
  the growth of science
  mathematics
  atomic theory
  statics and dynamics
  heat, light and sound
  electricity
  chemistry
  techniques of astronomy
  the solar system
  stars and star maps
  galaxies
  man in space
the physical Earth
  structure of the Earth
  the Earth in perspective
  weather
  seas and oceans
  geology
  Earth's resources
  agriculture
  cultivated plants
  flesh, fish, and fowl
the natural world
  how life began
  plants
  animals
  insects
  fish
  amphibians and reptiles
  birds
  mammals
  prehistory animals and plants
  animals and their habitats
  conservation
man and society
  evolution of man
  how your body works
  illness and health
  mental health
  human development
  man and his gods
  communication
  politics
  law
  work and play
  economics
history and culture
  the art of prehistory
  classical Greece
  India, China and Japan
  Barbarian invasions
  the crusades
  age of exploration
  the Renaissance
  the English revolution
  Neoclassicism
  colonizing Australasia
  world war I
  Ireland and independence
  Twenties and the depression
  world war II
  Hollywood
man and machines
  the growth of technology
  materials and techniques
  power
  machines
  transport
  weapons
  engineering
  communications
  industrial chemistry
  domestic engineering
the modern world
  almanack
  countries of the world
  atlas
  gazetteer


Library of Congress classification

A  general works
B  philosophy and religion
C  auxiliary sciences of history
D  general and Old World history
E  general U.S. history
F  local U.S. history, Canadian & Latin American history
G  geography and anthropology
H  social science
I
J  political science
K  law
L  education
M  music
N  fine arts (visual arts)
O
P  language and literature
Q  natural science
R  medicine
S  agriculture
T  technology
U  military science
V  naval science
W
X
Y
Z  bibliography and library science


Lo's list classification

arts
  architecture
  education
  language
  literature
  music
  painting
  peerage
entertainment
  books
  games
  movies
  other
  people/characters
  songs
  sports
  television
geography
history
  other
  people
  periods
human behavior
  mental health
  morality
  other
measurements
  other
  space
  time
miscellaneous
mythology and religion
  bible
  greek and roman
  hindu
  oriental
  other
science, math
  astronmy
  biology
  chemistry
  computers
  geology
  mathematics
  physics
thematic classification
  new
  old
  visual


Macmillan Desk Reference's classification

the physical world
  astronomy
  geology
  geography
  biology
  botany
  zoology
  environmental issues
science and technology
  physics
  chemistry
  how things work
  mathematics
communications
  language
  signalling systems
  time and distance
  computer systems
history
  early history
  the ancient world
  America and Europe 1400-1850
  Civil War to World War 1
  World War 1 and after
  World War 2 to today
the arts
  theater
  music and dance
  painting and sculpture
  literature
  cinema and photography
  decorative arts
  architecture
religion and philosophy
  judaism
  christianity
  islam
  hinduism and sikhism
  buddhims and jainism
  eastern religions
  religions of the 20th century
  philosophy and thought
  ancient religions
body and health
  physiology
  skin and hair
  sex and reproduction
  fitness and health
  medicine
  psychology
sports
  types of sport
  athletics
  boxing
  display
  target
  court
  team
  racing
  Olympic games


Martini's classification of knowledge

philologica
  ratiocinatrix
    historica
    logica
  sermocinatrix
    primaria
      musica
      poetica
    secundaria
principalis
  philosophica
    optica
    physiognomica
      juridia
      medica
    practica
      specialis
        politica
        oeconomica
      ethica
    theoretica
      specialis
        mathematica
          geometrica
          arithmetica
        physica
      ethica


McArthur's classification

life and living things
  life and living things
  living creatures generally
  animals/mammals
  birds
  reptiles and amphibians
  fish and other water creatures
  insects and similar creatures
  parts of animals
  kinds and parts of plants
  plants generally
the body: it's functions and welfare
  the body generally
  the body: overall
  the head and the face
  the trunk, arms, and legs
  the skin, the complexion, and the hair
  fluids and waste products of the body
  bodily states and associated activities
  bodily conditions relating to health, sickness, and disability
  diseases and ailments
  medicin and general medical care
people and the family
  people
  courting, sex, and marriage
  friendship and enmity
  death and burial
  social organizations in groups and places
  government
  politics and elections
  political tension and trouble
  social classifications and situations
  law and order generally
  courts of law and legal work
  the police, security services, crimes, and criminals
  prison and punishment
  warfare, defence, and the army; fighting, war, and peace
  the armed forces
  religion and beliefs
buildings, houses, the home, clothes, belongings and personal care
  architecture and kinds of houses and buildings
  parts of houses
  areas around and near houses
  residence
  belonging and owning, getting and giving
  furniture and household fittings
  clothes and personal belongings
  cleaning and personal care
food, drink, and farming
  food generally
  food
  drinks
  cigarettes and drugs
  the preparation and quality of food
  places and people associated with food and drink
  farming
feelings, emotions, attitudes and sensations
  feeling and behaviour generally
  liking and not liking
  good and evil
  happiness and sadness
  anger, violence, stress, calm, and quietness
  fear and courage
  admiration, pride, contempt,and abuse
  kindness and unkindness
  honesty, loyalty, trickery, and deceit
  relaxation, excitement, interest, and surprise
  actions of the face related to feelings
  senses and sensations
thought and communication, language and grammar
  thinking, judging and remembering
  knowing and learning
  communicating, mainly by speaking and talking
  communicating, mainly by reading and writing, printing and publishing,
    radio and television
  communication and information
  language
  grammar
  general grammatical words
substances, materials, objects and equipment
  substances and materials generally
  objects generally
  specific substances and materials
  equipment, machines, and instruments
  tools
  containers
  electricity and electrical equipment
  weapons
arts and crafts, science and technology, industry and education
  making things
  arts and crafts
  science and technology
  industry and work
  education
numbers, measurement, money and commerce
  numbers and quantities
  mathematics
  measurement
  money
  banking, wealth, and investment
  commerce
  shopping and general expenses
  business, work, and employment
entertainment, sports and games
  entertainment generally
  music and related activities
  recording sound, listening to the radio, etc.
  drama, the theatre, and show business
  sports and games generally
  indoor games
  children's games and toys
  outdoor games
space and time
  the universe
  light and colour
  weather and temperature
  geography
  time generally
  beginning and ending
  old, new, and young
  periods of time and their measurement
  grammatical words and phrases relating to time
movement, location, travel and transport
  moving, coming, and going
  putting and taking, pulling and pushing
  travel and visiting
  vehicles and transport on land
  places
  shipping
  aircraft
  locations and direction
general and abstract terms
  being, becoming, and happening
  possibility, chance, and necessity
  general, usual, unusual, etc.
  size, importance, and availability
  doing things
  causing
  resemblance, difference, and change
  rightness, fairness, purpose, use, and strength
  fullness, heaviness, thickness, stiffness, roughness, etc.
  actions and positions
  cutting, joining, breaking, and destroying
  showing, hiding, finding, saving, and similar words


NYPL Desk Reference's classification

times and dates
weights and meaures
symbols and signs
the animal world
math and science basics
inventions and scientific discoveries
the arts
literature
religions
philosophy
libraries and museums
words
grammar and punctuation
etiquette
forms of address
legal information
personal finances
useful addresses
travel
for the homemaker
the outdoors
sports and games
health
first aid
the world


Open Directory dmoz.org's classification

Arts
  Animation
  Antiques
  Architecture
  Art History
  Art Therapy
  Bodyart
  Celebrities
  Classical Studies
  Comics
  Crafts
  Dance
  Design
  Digital
  Education
  Entertainment
  Graphic Design
  Humanities
  Illustration
  Literature
  Movies
  Music
  Myths and Folktales
  Native and Tribal
  Online Writing
  Performing Arts
  Photography
  Radio
  Rhetoric
  Television
  Theatre
  Typography
  Video
  Visual Arts
  Writers Resources
  Genres
  Internet Directories and Portals
  Magazines and E-zines
  Periods and Movements
  Regional
Business
  Associations
  Business Software
  Business Travel
  Classifieds
  Cooperatives
  Directories
  E-Commerce
  Economics
  Employment
  History
  Industries
  International Business and Trade
  Investing
  Major Companies
  News and Publications
  Opportunities
  Resources
  Small Business
  Training and Schools
  Venture Capital
  Accounting
  Advertising
  Agriculture and Forestry
  Arts and Entertainment
  Business Services
  Construction and Maintenance
  Consulting
  Customer Service
  Energy and Utilities
  Environmental and Safety
  Financial Services
  Food and Related Products
  Human Resources
  Insurance
  Internet
  Law
  Management
  Manufacturing
  Marketing
  Mining and Drilling
  Music
  Printing
  Publishing
  Real Estate
  Retail
  Security
  Telecommunications
  Transportation
Computers
  Algorithms
  Artificial Intelligence
  Artificial Life
  Bulletin Board Systems
  CAD
  Companies
  Computer Science
  Consultants
  Data Communications
  Data Formats
  Desktop Publishing
  E-Books
  Education
  Employment
  Emulators
  Ethics
  Fonts
  Games
  Graphics
  Hacking
  Hardware
  History
  Home Automation
  Human-Computer Interaction
  Internet
  Intranet
  Mailing Lists
  MIS
  Mobile Computing
  Multimedia
  Newsgroups
  Open Source
  Operating Systems
  Organizations
  Parallel Computing
  Performance and Capacity
  Product Support
  Programming
  Publications
  Robotics
  Security
  Shopping
  Software
  Speech Technology
  Supercomputing
  Systems
  Usenet
  Virtual Reality
Games
  Board Games
  Card Games
  Coin-Op
  Collectable Card Games
  Computer Games
  Console Games
  Crossword Puzzles
  Dice Games
  Fantasy Sports
  Fortune Telling
  Gambling
  Glass Bead Games
  Hand-Eye Coordination
  Hand Games
  Interactive Fiction
  Internet
  Investing Games
  Miniatures
  MUDs
  Paper and Pencil
  Party Games
  Play-By-Mail
  Puzzles
  Roleplaying
  Sports
  Tile Games
  Trading Cards
  Video Games
  Wordplay
  Yard and Deck Games
  Books
  Conventions
  Developers and Publishers
  Directories
  Employment
  Game Collecting
  Game Creation Systems
  Game Design
  Gaming Play Groups
  Magazines and E-zines
  Programming
  Ratings and Awards
  Retailers
  Wholesalers and Distributors
  Women in Gaming
Health
  Alternative
  Conditions and Diseases
  Healthcare Industry
  Medicine
  Mental Health
  Aging
  Animals
  Beauty
  Child Health
  Consumer Support Groups
  Dentistry
  Disabilities
  Education
  Employment
  Environmental Health
  Fitness
  Health Insurance
  Home Health
  Men's Health
  Nursing
  Nutrition
  Occupational Health and Safety
  Organizations
  Pharmacy
  Products and Shopping
  Professions
  Publications
  Public Health and Safety
  Reproductive Health
  Resources
  Senior Health
  Senses
  Services
  Substance Abuse
  Teen Health
  Weight Loss
  Women's Health
Home
  Apartment Living
  Consumer Information
  Cooking
  Do-It-Yourself
  Domestic Services
  Emergency Preparation
  Entertaining
  Family
  Gardens
  Home Business
  Homemaking
  Homeowners
  Moving and Relocating
  Personal Finance
  Personal Organization
  Pets
  Rural Living
  Seniors
  Shopping
  Urban Living
Kids and Teens
  Arts
  Computers
  Directories
  Entertainment
  Games
  Health
  People and Society
  Pre-School
  School Time
  Sports and Hobbies
  Teen Life
  Your Family
News
  Breaking News
  Internet Broadcasts
  Magazines
  Media
  Newspapers
  Alternative Media
  By Subject
  Colleges and Universities
  Columnists
  Current Events
  Directories
  Ezines
  Newspapers - International
  Online Archives
  Personalized News
  Politics
  Regional
  Satire
  Services
  Sports
  Television
  Weather
Recreation
  Air Hockey
  Amateur Radio
  Antiques
  Audio
  Autos
  Aviation
  Birdwatching
  Boating
  Bowling
  Climbing
  Collecting
  Crafts
  Drugs
  Fireworks
  Food
  Games
  Gardens
  Genealogy
  Guns
  Horoscopes
  Hot Air Ballooning
  Humor
  Kites
  Knives
  Living History
  Martial Arts
  Models
  Motorcycles
  Nudism
  Outdoors
  Parties
  Pets
  Roads and Highways
  Scouting
  Smoking
  Sports
  Theme Parks
  Trains and Railroads
  Travel
Reference
  Almanacs
  Archives
  Ask An Expert
  Bibliography
  Books
  Dictionaries
  Directories
  Education
  Encyclopedia
  Flags
  Geography
  Journals
  Knowledge Management
  Libraries
  Maps
  Museums
  Parliamentary Procedure
  Questions and Answers
  Quotations
  Scientific Reference
  Style Guides
  Thesauri
  Time
  World Records
Regional
  Africa
  Asia
  Caribbean
  Central America
  Europe
  Middle East
  North America
  Oceania
  Polar Regions
  South America
Science
  Conferences
  Directories
  Educational Resources
  Employment
  Institutions
  Instruments and Supplies
  Methods and Techniques
  News
  Publications
  Reference
  Science in Society
  Software
  Agriculture
  Anomalies and Alternative Science
  Astronomy
  Biology
  Chemistry
  Earth Sciences
  Environment
  History
  Math
  Physics
  Social Sciences
  Technology
Shopping
  Auctions
  Classifieds
  Directories
  Retailers
  Antiques and Collectibles
  Autos
  Books
  Children
  Clothing
  Computers
  Consumer Electronics
  Crafts
  Entertainment
  Ethnic and Regional
  Flowers
  Food
  Furniture
  Gifts
  Health and Beauty
  Holidays
  Home and Garden
  Jewelry
  Music
  Niche
  Office Products
  Pets
  Photography
  Publications
  Recreation and Hobbies
  Religious
  Sports
  Tobacco
  Tools
  Toys and Games
  Travel
  Vehicles
  Visual Arts
  Weddings
  Wholesale
Society
  Activism
  Advice
  Crime
  Death
  Disabled
  Economics
  Education
  Ethnicity
  Folklore
  Future
  Gay, Lesbian, and Bisexual
  Genealogy
  Government
  History
  Holidays
  Issues
  Language and Linguistics
  Law
  Lifestyle Choices
  Men
  Military
  Organizations
  Paranormal
  People
  Philosophy
  Politics
  Relationships
  Religion and Spirituality
  Sexuality
  Social Sciences
  Sociology
  Subcultures
  Support Groups
  Transgendered
  Urban Legends
  Women
  Work
Sports
  Business
  Chats and Forums
  College and University
  Directories
  Disabled
  Events
  Fantasy
  Gay, Lesbian, and Bisexual
  History
  Humor
  News and Media
  Officiating
  Organizations
  People
  Shopping
  Software
  Sports Economics
  Sports Medicine
  Sports Travel
  Team Spirit
  Women
  Youth and High School
  Adventure Racing
  Airsoft
  Animal Fighting
  Archery
  Badminton
  Baseball
  Basketball
  Billiards
  Bocce
  Boomerang
  Bowling
  Boxing
  Cheerleading
  Cricket
  Croquet
  Curling
  Cycling
  Darts
  Equestrian
  Extreme Sports
  Fencing
  Fishing
  Flying Discs
  Football
  Gaelic
  Goalball
  Golf
  Greyhound Racing
  Gymnastics
  Handball
  Hockey
  Horse Racing
  Kabbadi
  Korfball
  Lacrosse
  Laser Games
  Lumberjack
  Martial Arts
  Motorsports
  Multi-Sports
  Netball
  Orienteering
  Paddleball
  Paintball
  Petanque
  Racquetball
  Rodeo
  Roller Derby
  Rope Skipping
  Running
  Sailing
  Sepak Takraw
  Shooting
  Skateboarding
  Skating
  Skiing
  Sledding
  Sled Dog Racing
  Snowboarding
  Soccer
  Softball
  Squash
  Strength Sports
  Table Soccer
  Table Tennis
  Tchoukball
  Team Handball
  Tennis
  Track and Field
  Volleyball
  Walking
  Water Sports
  Winter Sports
  Wrestling


Pliny's Historia Naturalis classification

book  contents
------------------------------------------------------------------------
1     preface, table of contents in detail, acknowledgement of sources
2     cosmology, astronomy, meteorology, geography, geology
3     sites, races, seas, towns, harbours, rivers, etc.
4     sites, races, seas, towns, harbours, dimensions, etc.
5     sites, races, seas, towns, harbours, etc.
6     sites, races, seas, towns, harbours, etc.
7     human race: its biology, physiology and psychology
8     various animals, wild and domesticated (and also snakes,
      crocodiles and lizard)
9     aquatic species, including nereids, tritons and sea-serpents
10    ornithology, but also including various animals etc.
11    insects, their physiology and habits; also animals
12    trees and their various qualities
13    foreign trees and their use in supplying scent, fruit, paper and
      wood
14    vine-growing and the varieties of wine
15    olives, olive oil and fruit trees
16    forest trees and their various natures
17    the nature of cultivated trees
18    crops and their nature
19    the cultivation of flax and other plants used for fabrics and also
      vegetable gardening
20    medicines from garden plants
21    the nature of flowers, and flowers for garlands etc.
22    the importance of herbs
23    the culling of drugs from cultivated trees
24    drugs from forest trees
25    the nature of self-grown plants, the value of palnts and herbs
26    various drugs
27    the remaining kinds of plants, and the drugs derived from them
28    drugs obtained from animals
29    drugs obtained from animals
30    drugs obtained from animals
31    medicinal benefits acquired from aquatic animals
32    drugs from aquatic animals
33    the properties of metals
34    copper, bronze, lead etc., and including bronze statues
35    painting
36    the nature of stones
37    gems


Random House Electronic Encyclopedia's classification

geography
  countries
  cities, villages, towns
  U.S. states and capitals
  bodies of water
  mountains and mountain ranges
  people of the world
  languages of the world
  states, regions, provinces, parks
  land forms, islands, peninsulas, continents
history
  U.S.
  Europe
  Asia
  Latin America and Caribbean
  Africa
  Middle East
  Pacific
  Canada
  interantional events and treaties
  exploration
  international administrations and organizations
philosophy, religion, and mythology
  philosophy
  religion
  mythology, folklore
social science
  psychology
  economics, labour
  anthropology
  sociology
  political science
  education
  linguistics
the arts
  literature
  visual arts
  music and instruments
  sculpture, textiles, ceramics, jewelry
  art history
  photography
  performing arts
  architecture
  publishing and journalism
science
  biology, anatomy
  botany
  zoology
  ecology
  chemistry, physics, metallurgy, measures
  medicine, psychiatry, pathology
  astronomy, aerospace, meterology, climatology
  geology, oceanography, cartography
  mathematics
  technology
  agriculture, fishing, hunting, subsistence strategies
sports and leisure
  sports
  leisure and entertainment
  food and drink, consumables
law
government


Random House Encyclopedia's classification

the universe
  general astronomy
  history of astronomy
  telescopes
  the universe
  the solar system - general
  planets, moons, and non-stellar objects
  the sun
  stars and space
  space exploration
  extraterrestrial life
the Earth
  face of the land - geography
  the structure of the Earth - geology
  the history of the Earth
  the new geology - drifting continents
  water on the Earth
  earthquakes and volcanoes
  atmosphere and weather
  mineral resources
  energy resources
  preserving the Earth
  agriculture
  food and famine
  food plants
  plant products
  domesticated animals and their products
  forestry
  fisheries
life on Earth
  general
  evolution
  genetics and cell biology
  the microscopic world
  plants
  animals - anatomy, behavior, distribution
  simple animals
  insects and their relatives
  fish
  amphibians and reptiles
  birds
  mammals
  ecology - general
  habitats
  animal conservation
man
  the human body - structure, function, and health
  anthropology
  sociology
  psychology
  philosophy
  religion and mythology
  the occult
  political science
  economics
history and culture
  world history and culture and international affairs
  the ancient world: prehistory to the middle ages
  Europe: from the middle ages to modern times
  Africa and the Middle East
  Asia and Oceania
  Latin America
  United States and Canada: history and society
  United States and Canada: arts and letters
man and science
  general
  history of science
  mathematics - history
  basic mathematics
  algebra, geometry, and trigonometry
  calculus
  topology
  probability and statistics
  physics - history
  physics - general
  the structure of matter
  energy and motion
  relativity
  electricty and magnetism
  heat, light, sound
  chemistry - history
  basic chemistry
  electrochemistry
  chemical analysis
  physical chemistry
  inorganic chemistry
  organic chemistry
  biochemistry - history
  the chemistry of life
man and machines
  history of technology
  machines and technology
  producing energy
  transportation
  weapons
  engineering
  building
  electronics - general
  communication
  computers
  industry and materials


Random House Word Menu's classification

nature
  human body
    anatomy
    medical problems
    health, fitness, and enhancement
    hair and grooming
    physical appearance
  living things
    biology
    animals
    plants
    simpler life forms
  earth
    geology
    geography
    minerals, metals, and rocks
    landscapes and seascapes
    weather and natural phenomena
science and technology
  the sciences
    physics
    astronomy and space science
    mathematics
    chemistry
    medicine
    measures and weights
  technology
    machinery and fabrication
    structural components
    building and construction materials
    tools and hardware
    knots
    containers
    weapons and armaments
    electricity and electronics
    telecommunications
    computers
  transportation
    aircraft
    automobiles
    railroads
    ships and boats
    other vehicles
domestic life
  the home
    buildings
    exterior structure
    interior structure
    furnishings
    ornamental and functional articles
  the family
    kinship and family relations
    marriage and divorce
    parents and children
  eating
    eating verbs
    foods
    cooking and cuisine
    the kitchen
  clothing
    outer garments
    undergarments
    ornaments and accessories
    clothing material
    footwear
    hats, headgear, and hairpieces
    fashion and garment parts
institutions
  social order
    the city
    government
    politics
    law
    publishing and the press
    war and military
    international relations
    titles of rank
  the economy
    business and economics
    finance
    agriculture
    advertising
    insurance
    real estate
    occupations
  social science
    anthropology
    sociology
    psychology
    philosophy
    education
arts and leisure
  fine arts and literature
    painting
    sculpture
    literature
  performing arts
    classical music
    popular music
    musical instruments
    dance
    theater
    cinema
    television and radio
  applied arts
    architecture
    graphic design and printing
    photography
    crafts
  leisure and recreation
    holidays, celebrations and vacations
    entertainments and spectacles
    sports
    hunting and fishing
    gardening
    hobbies
    games, activities, and toys
    smoking and tobacco
    drinking and alcoholic beverages
language
  structure and usage
    grammar, phonetics and linguistics
    rhetoric and figures of speech
    qualifiers and connectives
    prefixes and suffixes
    abbreviations
  action and sense words
    verbs of motion
    verbs of sight
    verbs of speech
    sounds and noises
    smells and tastes
  common expressions
    exclamations
    greetings and farewells
    insults, slurs, and epithets
    terms of endearment and repsect
    nonsense, confusion, and trouble
  foreign expressions
    latin words and phrases
    foreign words and phrases
    yiddish borrowings
the human condition
  character and behavior
    personality and behavior
    sex, love and romance
    strategy, intrigue, and deception
  cognition
    time perception
    spatial positions and relations
    shapes
    colors
    verbs of thought
    reasoning and intuition
    judgment and critcism
  the dark side
    drugs abuse and alcoholism
    mental disturbances
    crime
    violence
    death
  faith
    religion
    mythology and folklore
    magic and the occult
    eschatology
    truth, wisdom and spiritual attainment


Roget's classification (1st ed.)

abstract relations
  existence
  relation
  quantity
  order
  number
  time
  change
  causation
space
  in general
  dimensions
  form
  motion
matter
  in general
  inorganic
    solids
    fluids
  organic
    vitality
    sensation
intellect
  formation of ideas
  communication of ideas
volition
  individual
  intersocial
    in general
    possessive relations
      property
      money
affections
  in general
  personal
  sympathetic
  moral
  religious


Roget's classification (4th ed.)

abstract relations
  existence
    abstract
    concrete
    formal
    modal
  relation
    absolute
    partial
    correspondence of
  quantity
    simple
    comparative
    conjunctive
    wholeness
  order
    in general
    consecutive
    collective
    distributive
    conformity to rule
  number
    in general
    determinate
    indeterminate
  time
    absolute
    relative
    with reference to age
    with reference to season
    recurrent
  change
  event
  causation
  power
    in general
    in operation
    indirect
    combination of forces
space
  in general
    abstract
    specific
    relative
    existence in
  dimensions
    general
    linear
    external and internal
  structure; form
    general
    special
    superficial
  motion
    in general
    change of place
    cojoined with froce
    with reference to direction
physics
  physics
  heat
  light
  electricity and electronics
  mechanics
  physical properties
  colour
matter
  matter in general
  inorganic matter
    mineral
    soil
    liquids
    vapors
  organic matter
    organic matter
    vitality
    vegetable life
    animal life
    mankind
    male and female
sensation
  sensation in general
  touch
  taste
  smell
  sight
  hearing
    perception of sound
    sound
    specific sounds
    unmusical sounds
    musical sounds
intellect
  intellectual faculties and processes
    faculties
    omprehension
    functions of the mind
    reasoning processes
    consideration
    assessment
    conclusion
    theory
    belief
    grounds for belief
    qualifications
    conformity to fact
    acceptance
  states of mind
    mental attitudes
    creative thought
    recollection
    anticipation
  communication of ideas
    nature of ideas communicated
    modes of communication
    education
    indication
    representation
    arts of design
    language
    grammar
    style; mode of expression
    spoken language
    written language
    linguistic representation
    uncommunicativeness; secrecy
    falsehood
volition
  volition in general
    will
    resolution; determination
    irresolusion; caprice
    evasion
    inclination
    choice
    custom
    motive
    purpose
    ways and means
    use
  conditions
    adaptation to ends
    wholesomeness
    health
    physical progress
    security
  voluntary action
    action
    exertion; endeavor
    preparation
    acccomplishment
    adroitness
    conduct
  authority; control
    prerogative
    politics and government
    direction
    directions
    constraint
    restraint
    unrestraint
    subjugation
    compliance
    pledge
    proposal
    consent
    commision
  support and opposition
    support
    opposition
    concord
    contention
    peace
    mid-course
  possessive relations
    possession
    sharing
    transfer of property
    appropriation
    interchange of property
    monetary relations
affections
  personal affections
    emotion
    excitability
    pleasure
    anticipative emotions
    discriminative affectins
    pride
    esteem
    contemplative emotions
  sympathetic affections
    social relations
    social affections
    civility
    benevolence
    sympathy
    gratefulness
    ill humour
    selfish resentment
    reprisal
  morality
    morals
    moral obligation
    moral sentiments
    moral conditions
    moral practice
    moral observance
  religion
   supernatural beings
   supernatural regions
   religious beliefs
   religious quality
   religious sentiments
   religious practice
   supernaturalism
   churchdom


Roget's classification (5th ed.)

the body and the senses
  body
  nutrition
  secretion
  bodily development
  rest
  sensation
  vision
  hearing
  taste
  touch
  sex
  cleanness
  health
feelings
place and change of place
  space
  motion
  container
  environment
  presence
  habitation
  town
  landscape
measure and shape
  quantity
  size
  distance
  form
  smoothness
  weight
  rarity
  measurement
living things
  age
  life
  animals and plants
  humankind
natural phenomena
behavior and the will
  behavior
  action
  assent
  imitation
  compensation
  intrepretation
  falseness
  resolution
  custom
  motivation
  improvement
  skill
  request
  aid
  possession
  celebration
  cowardice
  fastidiousness
  ornamentation
  retaliation
  ridicule
  fasting
language
  signs
  speech
  diction
  talkativness
  letter
human society and institutions
  relationship by blood
  school
  direction
  fashion
  friendship
  the people
  association
  wealth
values and ideals
  ethics
  title
  justice
  religion
  occultism
  piety
  worship
arts
  show business
  visual arts
  literature
occupations and crafts
  occupation
  money
  crafts
sports and amusements
the mind and ideas
  existence
  accompaniment
  relation
  agreement
  composition
  order
  time
  change
  generality
  list
  cause
  impulse
  spectator
  knowledge
  comparison
  theory
  belief
  foresight
  truth
  mental attitude
  specter
  memory
  expedience
  goodness
  danger
  prosperity
science and technology
  mathematics
  light
  electricity
  friction
  liquidity
  biology
  earth science


Stibb's classification

geography
animals and plants
people
the arts
science and technology
religion and mythology
work
military terms
transport
clothes aand materials
food and drink
sport and recreation
miscellaneous
languages
common sayings
words
first names


Stoddart's visual classification

astronomy
geography
vegetable kingdom
animal kingdom
human being
food
farming
architecture
house
house furniture
gardening
do-it-yourself
clothing
personal adornment
personal articles
communications
transportation
  road
  rial
  subway
  sea
  air
  space
office supplies and equipment
music
creative leisure activities
sports
  team games
  water sports
  aerial sports
  winter sports
  equestrian sports
  athletics
  combat sports
  leisure sports
  indoor games
  camping
measuring devices
optical instruments
health
energy
heavy machinery
weapons
symbols


Universal Decimal Classification

0 Generalities. Information. Organization.
  01 Bibliography. Catalogues.
  02 Libraries. Librarianship.
  03 Reference Books: Encyclopedias, Dictionaries.
  04 Essays, Pamphlets, and Brochures.
  05 Periodicals. Reviews.
  06 Corporate Bodies; Institutions.
  07 Newspapers. Journalism.
  08 Polygraphies. Collective Works.
  09 Manuscripts. Rare and Remarkable Works.
1 Philosophy. Psychology.
  120 Metaphysics.
  130 Metaphysics of Spiritual Life. Occultism.
  140 Philosophical Systems
  150 Psychology.
  160 Logic. Theory of Knowledge. Logical Method.
  170 Ethics. Moral Science. Convention.
  180 Aesthetics.
2 Religion. Theology.
  21 Natural Theology; Religious Philosophy.
  22 Holy Scripture. The Bible.
  23 Dogmatic Theology.
  24 Practical Theology: Christian Living.
  25 Pastoral Theology.
  26 Christian Church: General.
  27 Christian Church: Historical.
  28 Christian Church: Worshipping Bodies.
  29 Nonchristian Religions. Comparative Religion.
3 Social Sciences. Economics. Law. Government. Education.
  31 Statistics.
  32 Political Science. Politics. Current Affairs.
  33 Political and Social Economy. Economics.
  34 Jurisprudence. Law. Legislation.
  35 Public Administration. Defence. Military.
  36 Social Relief/Welfare. Insurance.
  37 Education.
  38 Trade. Commerce. Communication. Transport.
  39 Ethnography. Custom. Tradition. Folklore.
4 vacant
5 Mathematics and Natural Sciences.
  51 Mathematics.
  52 Astronomy, Surveying, Geodesy.
  53 Physics.
  54 Chemistry. Mineralogy.
  55 Geology. Meteorology.
  56 Paleontology.
  57 Biology. Anthropology.
  58 Botany.
  59 Zoology
6 Applied Sciences. Technology. Medicine.
  61 Medical Sciences. Health.
  62 Engineering and Technology Generally.
  63 Agriculture, Forestry, Stockbreeding, Fisheries.
  64 Domestic Science; Household Economics.
  65 Technology of Business, Communication, and Transport.
  66 Chemical Industry. Chemical Technology.
  67 Manufacturing: Industry and Crafts.
  68 Specialized Trades, Crafts, and Industries.
  69 Building: Industry, Materials, Trades, Construction.
7 The Arts. Recreation. Entertainment. Sport.
  70 Generalities.
  71 Physical Planning. Landscape, etc.
  72 Architecture.
  73 Sculpture and the Plastic Arts.
  74 Drawing and Minor Arts.
  75 Painting.
  76 Engraving. Prints.
  77 Photography and Cinematography.
  78 Music.
  79 Entertainment. Pastimes. Games. Sport.
8 Language. Linguistics. Literature.
  80 Linguistics. Philology. Languages.
  81 vacant
  82 Western Literature. English Literature.
  83 German/Dutch/Scandinavian Literature.
  84 French Literature.
  85 Italian Literature.
  86 Spanish/Portuguese Literature.
  87 Classical (Latin and Greek) Literature.
  88 Slavic Literature.
  89 Literature in Other Languages.
9 Geography. Biography. History.
  90 Archaeology; Antiquities.
  91 Geography, Exploration, and Travel.
  92 Biography.
  93 Historical Sciences; Ancient, Medieval, Modern History.
  94 History of Europe.
  95 History of Asia.
  96 History of Africa.
  97 History of North and Central America.
  98 History of South America.
  99 History of Oceania and Polar Regions.


What's What's visual classification

the earth
  the planetary system
  the earth
  terrains
  water systems
  weather
  maps
living things
  man
  edible animals
  domestic animals
  wild animals
  plants
shelters and structures
  house
  architectural design from other lands
  special purpose buildings
  other structures
transportation
  automobile
  public transportation
  carriers
  emergency vehicles
  cycles
  recreational vehicles
  caarriages
  boats and ships
  aricraft
  spacecraft
communication
  print
  visual
  aural
  audiovisual
personal items
  men's apparel
  women's apparel
  unisex clothing
  headwear
  footwear
  fasteners
  hairstyles and facial hair
  cosmetics
  jewelry
  timepieces
  eyeglasses
  bags
  wallet and currency
  smoking materials
  umbrella
the home
  living room
  dining room
  kitchen
  bedroom
  bathroom
  playroom/utility room
  yar
sports and recreation
  team sports
  competitive sports
  table games
  individual sports
  equestrian sports
  automobile racing
  outdoor sports
  bodybuilding
  board games
  casino games
arts and crafts
  performing arts
  music
  fine arts
  cartooning
  crafts
machinery, tools and weapons
  power systems
  climate control units
  engines
  household tools
  gardening tools
  rancher's equipment
  trapping devices
  agricultural tools
  construction equipment
  computing tools
  scientific tools
  sensing devices
  medicaal tools
  security devices
  chain and pulley
  execution devices
  weapons
uniforms, costumes and ceremonial attire
  royal vestments
  religious aattire
  wedding aaattire
  servant's attire
  native attire
  historical costumes
  performer's costumes
  military attire
  municipal uniforms
signs and symbols
  flags
  heraldry
  road signs
  public signs
  religious symbols
  signs of the zodiac
  symbls of science, business, and commerce
  sign alphabet and Braille
  grammaatical symbols
  proofreader's marks
  graffiti
tombstone and coffin


Wilkins' classification

God
the elements, meteors, stones, metals
plants, herbs, flowers, shrubs, trees
animals, fishes, birds, beasts
parts of bodies
quantity, magnitude, space, measure
quality (of natural power, habit, manners, the senses, diseases)
action (spiritual, corporeal, in motion, in operations)
relations (in the family, regarding possessions, and provisions)
public relationships (civil, judiciary, naval, military, ecclesiastical)


Yahoo.com's classification

Arts & Humanities
  Art History
  Artists
  Arts Therapy
  Awards
  Booksellers
  Censorship
  Chats and Forums
  Companies
  Crafts
  Criticism and Theory
  Cultural Policy
  Cultures and Groups
  Design Arts
  Education
  Employment
  Events
  Humanities
  Institutes
  Museums, Galleries, and Centers
  News and Media
  Organizations
  Performing Arts
  Reference
  Thematic
  Visual Arts
  Web Directories
Business & Economy
  Business Libraries
  Business Schools
  Chats and Forums
  Classifieds
  Consortia
  Consumer Advocacy and Information
  Conventions and Conferences
  Cooperatives
  Directories
  Economics
  Education
  Electronic Commerce
  Employment and Work
  Ethics and Responsibility
  Finance and Investment
  Global Economy
  History
  Intellectual Property
  Labor
  Law
  Magazines
  Management Science
  Marketing and Advertising
  News and Media
  Organizations
  Quality Standards
  Real Estate
  Small Business Information
  Statistics and Indicators
  Taxes
  Television
  Trade
  Transportation
Computers & Internet
  Art
  Bibliographies
  Communications and Networking
  Computer Science
  Contests
  Conventions and Conferences
  Countries, Cultures, and Groups
  Cyberculture
  Data Formats
  Desktop Customization
  Desktop Publishing
  Dictionaries
  Employment
  Ethics
  Games
  Graphics
  Hardware
  History
  Humor
  Industry Information
  Internet
  Magazines
  Mobile Computing
  Multimedia
  Music
  News and Media
  Operating Systems
  Organizations
  People
  Personal Computers
  Product Reviews
  Programming Languages
  Science and Technology Policy
  Security and Encryption
  Semiconductors
  Software
  Standards
  Supercomputing and Parallel Computing
  Technical Guides and Support
  Telecommunications
  Training
  User Groups
  Web Directories
  World Wide Web
  Year 2000 Problem
Education
  Academic Competitions
  Adult and Continuing Education
  Bibliographies
  Bilingual
  Career and Vocational
  Chats and Forums
  Companies
  Conferences
  Correctional
  Disabilities
  Distance Learning
  Early Childhood Education
  Employment
  Equity
  Financial Aid
  Government Agencies
  Graduation
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  Instructional Technology
  Journals
  K-12
  Literacy
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  Reform
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  Statistics
  Teaching
  Theory and Methods
  Web Directories
Entertainment
  Actors and Actresses
  Amusement and Theme Parks
  Books and Literature
  Chats and Forums
  Comedy
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  Consumer Electronics
  Contests, Surveys, and Polls
  Cool Links
  Employment
  Entertainment and Media Production
  Events
  Food and Drink
  Gambling
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  Genres
  History
  Humor
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  Movies and Film
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  News and Media
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  Radio
  Randomized Things
  Reviews
  Shopping and Services
  Television
  Trivia
  Virtual Cards
  Web Directories
  Webisodes
  X of the Day, Week, etc.
Government
  Chats and Forums
  Civic Participation
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  News and Media
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  Web Directories
Health
  Alternative Medicine
  Business to Business
  Chats and Forums
  Children's Health
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  Death and Dying
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  Education
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  First Aid
  Fitness
  General Health
  Health Administration
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  Health Sciences
  Hospitals and Medical Centers
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  Long Term Care
  Medicine
  Men's Health
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  Midwifery
  News and Media
  Nursing
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  Organizations
  Pet Health
  Pharmacy
  Procedures and Therapies
  Public Health and Safety
  Reference
  Reproductive Health
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  Shopping and Services
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  Traditional Medicine
  Travel Health and Medicine
  Web Directories
  Weight Issues
  Women's Health
  Workplace
News & Media
  By Region
  Columns and Columnists
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  Web Directories
Recreation & Sports
  Amusement and Theme Parks
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  Booksellers
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  Gambling
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  Hobbies
  Home and Garden
  Magazines
  Motorcycles
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  Travel
Reference
Regional
  U.S. States
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  Antarctica
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  Caribbean
  Central America
  Europe
  Latin America
  Mediterranean
  Middle East
  North America
  Oceania
  Pacific Rim
  South America
Science
  Acoustics
  Agriculture
  Alternative
  Amateur Science
  Animals, Insects, and Pets
  Anthropology and Archaeology
  Artificial Life
  Ask an Expert
  Astronomy
  Aviation and Aeronautics
  Bibliographies
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  Energy
  Engineering
  Events
  Forensics
  Geography
  Geology and Geophysics
  History
  Humor
  Hydrology
  Information Technology
  Institutes
  Journals
  Libraries
  Life Sciences
  Mathematics
  Measurements and Units
  Medicine
  Meteorology
  Museums and Exhibits
  Nanotechnology
  News and Media
  Oceanography
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  Space
  Sports
  Web Directories
Social Science
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  Area Studies
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  Books
  Chats and Forums
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  Education
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  Humanities
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  Lesbian, Gay, and Bisexual Studies
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  Holidays and Observances
  Issues and Causes
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  Religion and Spirituality
  Reunions
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  Web Directories
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