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
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History
Intellectual Property
Labor
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Magazines
Management Science
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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
Higher Education
Instructional Technology
Journals
K-12
Literacy
News and Media
Organizations
Policy
Programs
Reform
Special Education
Standards and Testing
Statistics
Teaching
Theory and Methods
Web Directories
Entertainment
Actors and Actresses
Amusement and Theme Parks
Books and Literature
Chats and Forums
Comedy
Comics and Animation
Consumer Electronics
Contests, Surveys, and Polls
Cool Links
Employment
Entertainment and Media Production
Events
Food and Drink
Gambling
Games
Genres
History
Humor
Magic
Movies and Film
Music
News and Media
Organizations
Performing Arts
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
Conventions and Conferences
Documents
Embassies and Consulates
Ethics
Intelligence
International Organizations
Law
Military
National Symbols and Songs
News and Media
Politics
Public and Civil Service
Research Labs
Statistics
Student Government
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U.S. Government
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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Environmental Health
First Aid
Fitness
General Health
Health Administration
Health Care
Health Sciences
Hospitals and Medical Centers
Institutes
Law
Long Term Care
Medicine
Men's Health
Mental Health
Midwifery
News and Media
Nursing
Nutrition
Organizations
Pet Health
Pharmacy
Procedures and Therapies
Public Health and Safety
Reference
Reproductive Health
Senior Health
Sexuality
Shopping and Services
Teen Health
Traditional Medicine
Travel Health and Medicine
Web Directories
Weight Issues
Women's Health
Workplace
News & Media
By Region
Columns and Columnists
Commercial Services
Content Ratings
Industry Information
Internet Broadcasts
Journals
Magazines
Newspapers
Photojournalism
Radio
Television
Web Directories
Recreation & Sports
Amusement and Theme Parks
Automotive
Aviation
Booksellers
Chats and Forums
Cooking
Dance
Employment
Events
Fitness
Gambling
Games
Hobbies
Home and Garden
Magazines
Motorcycles
Outdoors
Pets
Sports
Television
Toys
Travel
Reference
Regional
U.S. States
Africa
Antarctica
Arctic
Asia
Caribbean
Central America
Europe
Latin America
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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
Biology
Booksellers
Chats and Forums
Chemistry
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Complex Systems
Computer Science
Dictionaries
Earth Sciences
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Education
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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
Organizations
Paleontology
People
Physics
Psychology
Religion and Science
Research
Science and Technology Policy
Science on Postage Stamps
Space
Sports
Web Directories
Social Science
Anthropology and Archaeology
Area Studies
Bibliographies
Books
Chats and Forums
Communications
Conferences
Critical Theory
Disability Studies
Economics
Education
Employment
Environmental Studies
Ethnic Studies
Futures Studies
Gender Studies
Genealogy
Geography
Gerontology
History
Humanities
Institutes
Journals
Law
Lesbian, Gay, and Bisexual Studies
Libraries
Library and Information Science
Linguistics and Human Languages
Migration and Ethnic Relations
Organizations
Peace and Conflict Studies
Political Science
Popular Culture Studies
Psychology
Recreation and Leisure Studies
Rural Development
Science, Technology, and Society Studies
Sexology
Social Research
Social Work
Sociology
Urban Studies
Web Directories
Women's Studies
Society & Culture
Advice
Bibliographies
Chats and Forums
Crime
Cultural Policy
Cultures and Groups
Death and Dying
Disabilities
Environment and Nature
Etiquette
Events
Families
Fashion
Firearms
Food and Drink
Gender
Holidays and Observances
Issues and Causes
Journals
Magazines
Museums and Exhibits
Mythology and Folklore
People
Pets
Relationships
Religion and Spirituality
Reunions
Sexuality
Social Organizations
Web Directories
Weddings