Portal:Contents/Categorical index

Wikipedia's contents: Categorical index

Categories (along with other features like cross-references, lists, and infoboxes) help you to find information, even if you don't know what exists or what it's called. The following list of categories of Wikipedia's coverage parallels our other lists by topic.

General reference

Main categories: Research and Library and information science

Reference works • Almanacs • Atlases • Biographical dictionaries • Dictionaries (online) • Directories (online) • Encyclopedias (online) • Glossaries • Handbooks and manuals • Lists • Medical manuals • Reference works in the public domain • Style guides • Trivia books • Reference book stubs • Web sites

Further research tools and topics • Academic disciplines • Archives • Books • Clients • Colleges • Curricula • Databases (online) • Distance education • Grammar • Government agencies • Indices • Information • Knowledge • Libraries (digital) • Library cataloging and classification • News agencies • Periodic table • Prefixes • Reading • Research • Search engines • Suffixes • Topics • Universities • Writing

Culture and the arts

Geography and places

Main category: Geography

Cities • Continents • Countries • Deserts • Lakes • Landforms • Maps • Mountains • Oceans • Parks • Rivers • Subterranea • Towns • Villages;• Communities

Health and fitness

Main categories: Health, Self-care, and Healthcare occupations

Self-care – Health promotion • Life extension • Prevention • Sexual health

Nutrition – Dietary supplements • Dietetics • Nutrients  (Amino acids, Minerals, Nootropics, Phytochemicals, Vitamins) • Nutritional advice pyramids

Exercise – Aerobics • Bodyweight exercise (Calisthenics) • Cycling • Exercise equipment • Exercise instructors • Dancing • Exercise physiology • Hiking • Pilates • Running • Sports • Swimming • T'ai Chi Ch'uan • Walking • Weight training • Weight training exercises • Yoga

Hygiene – Cleaning • Oral hygiene

Positive psychology – Mental health • Psychotherapy

Public health  – Health by country • Healthcare • Health law • Health promotion • Health standards • Occupational safety and health • Pharmaceutical industry • Safety •

Health science – Clinical research • Diseases • Epidemiology • Midwifery • Nursing • Nutrition • Optometry • Pharmacy • Public health 

Medicine – Veterinary medicine

Dentistry • Dental hygiene and Orthodontics • Pharmaceuticals policy •

Human medicine – Alternative medicine • Cardiology • Endocrinology • Forensics • Gastroenterology • Human Genetics • Geriatrics • Gerontology • Gynecology • Hematology • Nephrology • Neurology • Obstetrics • Oncology • Ophthalmology • Orthopedic surgery • Pathology • Pediatrics • Psychiatry • Rheumatology • Sleep • Surgery • Urology

History and events

Main categories: History and Events

By Period • By Topic • Science • Religion • Historiography • Timelines

History by Location

Regions – Africa • Asia • Europe • North America • Middle East • Oceania • South America

Countries – Cities – Empires

Mathematics and logic

Main categories: Mathematics and Abstraction

Algebra • Analysis • Arithmetic • Education • Equations • Geometry • Logic • Measurement • Numbers • Proofs • Theorems • Trigonometry

Statistics • Analysis of variance • Bayesian statistics • Categorical data • Covariance and correlation • Data analysis • Decision theory • Experimental design • Logic and statistics • Multivariate statistics • Non-parametric statistics • Parametric statistics • Regression analysis • Sampling • Statistical theory • Stochastic processes • Summary statistics • Survival analysis • Time series analysis • Uncertainty of numbers

Natural and physical sciences

Main categories: Science, Natural sciences, and Nature

Scientific method • Scientists

Biology • Ecology • Health sciences • Medicine • Neuroscience • (See also the Health and fitness section above)

Physical sciences • Astronomy • Chemistry • Climate • Earth sciences • Geology • Physics • Space

Nature: • Animals • Environment • Humans • Life • Natural resources • Plants • Pollution

People and self

Main categories: People, Personal life, Self and Surnames,

People • Beginners and newcomers • Biographies • Children • Heads of state • Humans • Legal categories of people • Men • Old age • Political people • Rivalry • Social groups • Subcultures • Women •

Specific people: by city • by company • by continent • by educational institution • by ethnic or national descent • by ethnic or national origin • by ethnicity or race • by medical or psychological condition • by nationality • by occupation • by political orientation • by religion • by revolution • by status • by year born • by year deceased

Lists of people • Personal timelines

Activists • Actors • Astronauts • Billionaires • Chief executives • Colonial people • Composers • Cyborgs • Defectors • Generals • Humanitarians • Innovators • Inventors • Lesbian, gay, bisexual or transgendered • Monarchs • Musicians • Musical groups • Philosophers • Politicians • Presidents • Princes • Princesses • Professors • Revolutionaries • Scientists • Settlers • Slaves • Victims • People associated with war • World record holders • Writers

Self • Alter egos • Consciousness studies • Gender • Personality • Sexuality • Sexual orientation

Personal life • Clothing • Employment • Entertainment • Food and drink • Games • Health • Hobbies • Home • Income • Interpersonal relationships • Leisure • Love • Motivation • Personal development • Pets

Philosophy and thinking

Main categories: Philosophy and Thought

Philosophy • Branches • Schools and traditions • Movements • Theories • Arguments • Philosophers • Literature • History • By era • By region • Aesthetics • Epistemology • Ethics • Logic • Metaphysics

Thinking / thinking skills • Attention • Cognition • Cognitive biases • Creativity • Decision theory • Emotion • Error • Imagination • Intelligence • Intelligence researchers • Learning • Memory • Memory biases • Mnemonics • Nootropics (smart drugs) • Organizational thinking • Perception • Problem solving • Psychological adjustment • Psychometrics • Qualities of thought

Religion and belief systems

Main categories: Religion and Belief

Allah • Bible • Buddhas • Deities • Demons • Exorcism • God • Jesus • Mythology • Occult • Prayer • Prophecy • Qur'an • Religious ethics • Religious law • Ritual • Spirituality • Theology 

Belief systems • Religious faiths, traditions, and movements • Agnosticism • Animism • Atheism • Deism • Determinism • Esotericism • Gnosticism • Humanism • Monism • Monotheism • Mysticism • New Age • Paganism • Pantheism • Polytheism • Shamanism • Skepticism • Spiritualism • Theosophy • Transcendentalism • Unitarianism

Major beliefs of the world  • Agnosticism • Atheism • Ayyavazhi • Bahá'í Faith • Buddhism • Cao Dai • Chinese traditional religion • Christianity • Confucianism • Falun Gong • Hinduism • Islam • Jainism • Judaism • Mormonism • Neopaganism • Rastafarianism • Satanism • Scientology • Sikhism • Spiritism • Shinto • Taoism • Tenrikyo • Unitarian Universalism • Wicca • Zoroastrianism

Mythology • Mythology by culture • Abrahamic mythology • Buddhist mythology • Christian mythology • Hindu mythology • Islamic mythology • Jewish mythology 

See also: Criticism of religion

Society and social sciences

Main categories: Science, Social sciences, and Society

Science and Scientific method • Scientists

Social sciences • Anthropology • Archaeology • Cultural studies • Demographics • Economics • Heuristics • Information studies • International relations • Linguistics • Psychology • Media studies • Political science • Social scientists • Sociology • Sexology • Systems theory

Society • Activism • Business • Communication • Crime • Education • Ethnic groups • Family • Finance • Government • Health • Home • Industries • Infrastructure • Labor • Law • Mass media • Military • Money • Organizations • Peace • Politics • Real Estate • Rights • War

Technology and applied sciences

Main categories: Technology and Applied sciences

Agriculture & Agronomy • Architecture • Automation • Biotechnology • Blu-ray • Cartography • Chemical engineering • Communication (Media studies • Telecommunications) • Construction • Design • Digital divide • Earthquake engineering • Electronics • Energy • Ergonomics • Firefighting • Fire prevention • Forensics • Forestry • Industry • Information science • Information technology • Internet • Management • Manufacturing • Marketing • Medicine (Unsolved problems in neuroscience) • Metalworking • Microtechnology • Military science • Mining • Nanotechnology • Nuclear technology • Nutrition • Optics • Plumbing • Robotics • Sound technology • Space exploration • Technology forecasting • Tools

Computing:  Artificial intelligence • Classes of computers • Companies • Computer architecture • Computer model • Computer science • Computer security • Computing and society • Data • Embedded systems • Free software • Human-computer interaction • Information systems • Internet • Mobile Internet • Languages • Multimedia • Networks • Industrial Networks • Operating systems • Platforms • Product lifecycle management • Programming • Real-time computing • Software • Software engineering • Unsolved problems in computer science • More...

Electronics:   Avionics • RF & MMIC Design • Circuits • Companies • Connectors • Consumer electronics • Digital electronics • Digital media • Electrical components • Electronic design • Electronics manufacturing • Embedded systems • Integrated circuits • Microwave technology • Molecular electronics • Water technology • Optoelectronics • Quantum electronics • RFID • Radio electronics • Semiconductors • Signal cables • Surveillance • Telecommunications • Terminology • More...

Engineering:  Aerospace engineering • Bioengineering • Chemical engineering • Civil engineering • Electrical engineering • Environmental engineering • Materials science • Mechanical engineering • Nuclear technology • Software engineering • Structural engineering • Systems engineering

Transportation:   By country • Automobiles • Aviation • Cycling • Public transport • Rail transport • Road transport • Shipping • Spaceflight • Vehicles • Water transport

Technology timelines