List of Dewey Decimal classes
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The '''[[Dewey Decimal System]]''' of library classification is made up of ten main classes or categories, each divided into ten secondary classes or subcategories, each having ten subdivisions. This system is a logical way of classifying a comprehensive array of disciplines, whether academic or practical.
== Classes ==
=== 000 – Computer science, information, and general works ===
*'''000 Generalities'''
**001 [[Knowledge]]
**002 [[Book|The book]]
**003 [[System]]s
**004 [[Data processing]] and [[Computer science]]
**005 [[Computer programming]], [[Computer program|program]]s, [[data]]
**006 Special computer methods
**''007 Not assigned or no longer used ''
**''008 Not assigned or no longer used ''
**''009 Not assigned or no longer used ''
*'''010 [[Bibliography]]'''
**011 Bibliographies
**012 Bibliographies of individuals
**013 Bibliographies of works by specific classes of authors
**014 Bibliographies of anonymous and pseudonymous works
**015 Bibliographies of works from specific places
**016 Bibliographies of works from specific subjects
**017 General subject catalogs
**018 Catalogs arranged by author & date
**019 Dictionary catalogs
*'''020 [[Library science|Library]] & [[information science]]s'''
**021 Library relationships
**022 Administration of the physical plant
**023 Personnel administration
**''024 Not assigned or no longer used ''
**025 Library operations
**026 [[:Category:Types of library|Libraries for specific subjects]]
**027 [[Public library|General libraries]]
**028 Reading, use of other information media
**''029 Not assigned or no longer used ''
*'''030 [[Encyclopedia|General encyclopedic works]]'''
**031 [[:Category:English-language encyclopedias|General encyclopedic works -- American]]
**032 [[:Category:English-language encyclopedias|General encyclopedic works in English]]
**033 General encyclopedic works in other Germanic languages
**034 [[:Category:French encyclopedias|General encyclopedic works in French]], Provencal, Catalan
**035 [[:Category:Italian encyclopedias|General encyclopedic works in Italian]], Romanian, Rhaeto-Romanic
**036 [[:Category:Spanish encyclopedias|General encyclopedic works in Spanish]] & Portuguese ([[:Category:Latin American encyclopedias|Latin American]])
**037 General encyclopedic works in Slavic languages
**038 General encyclopedic works in Scandinavian languages
**039 General encyclopedic works in other languages
*'''040 Not assigned or no longer used'''
**''041 Not assigned or no longer used ''
**''042 Not assigned or no longer used ''
**''043 Not assigned or no longer used ''
**''044 Not assigned or no longer used ''
**''045 Not assigned or no longer used ''
**''046 Not assigned or no longer used ''
**''047 Not assigned or no longer used ''
**''048 Not assigned or no longer used ''
**''049 Not assigned or no longer used ''
*'''050 General serials & their [[index (publishing)|indexes]]'''
**051 General serials & their indexes American
**052 General serials & their indexes In English
**053 General serials & their indexes In other Germanic languages
**054 General serials & their indexes In French, Provencal, Catalan
**055 General serials & their indexes In Italian, Romanian, Rhaeto-Romanic
**056 General serials & their indexes In Spanish & Portuguese
**057 General serials & their indexes In Slavic languages
**058 General serials & their indexes In Scandinavian languages
**059 General serials & their indexes In other languages
*'''060 General organization & [[museology]]'''
**061 General organization & museology In North America
**062 General organization & museology In British Isles In England
**063 General organization & museology In central Europe In Germany
**064 General organization & museology In France & Monaco
**065 General organization & museology In Italy & adjacent territories
**066 General organization & museology In Iberian Peninsula & adjacent islands
**067 General organization & museology In eastern Europe In Soviet Union
**068 General organization & museology In other areas
**069 Museology (Museum science)
*'''070 [[News media]], [[journalism]], [[publishing]]'''
**071 News media, journalism, publishing In North America
**072 News media, journalism, publishing In British Isles In England
**073 News media, journalism, publishing In central Europe In Germany
**074 News media, journalism, publishing In France & Monaco
**075 News media, journalism, publishing In Italy & adjacent territories
**076 News media, journalism, publishing In Iberian Peninsula & adjacent islands
**077 News media, journalism, publishing In eastern Europe In Soviet Union
**078 News media, journalism, publishing In Scandinavia
**079 News media, journalism, publishing In other languages
*'''080 General collections'''
**081 General collections American
**082 General collections In English
**083 General collections In other Germanic languages
**084 General collections In French, Provencal, Catalan
**085 General collections In Italian, Romanian, Rhaeto-Romanic
**086 General collections In Spanish & Portuguese
**087 General collections In Slavic languages
**088 General collections In Scandinavian languages
**089 General collections In other languages
*'''090 Manuscripts & rare books'''
**091 [[Manuscript]]s
**092 [[woodblock printing|Block book]]s
**093 [[Incunabula]]
**094 Printed books
**095 Books notable for [[Bookbinding|binding]]s
**096 Books notable for illustrations
**097 Books notable for ownership or origin
**098 [[List of banned books|Prohibited works]], [[forgery|forgeries]], [[hoax]]es
**099 Books notable for format
=== 100 – Philosophy and psychology ===
*'''100 [[Philosophy]] & [[psychology]]'''
**101 [[Philosophical method|Theory of philosophy]]
**102 Miscellany of philosophy
**103 Dictionaries of philosophy
**''104 Not assigned or no longer used ''
**105 Serial publications of philosophy
**106 Organizations of philosophy
**107 Education, research in philosophy
**108 Kinds of persons in philosophy
**109 Historical treatment of philosophy
*'''110 [[Metaphysics]]'''
**111 [[Ontology]]
**''112 Not assigned or no longer used ''
**113 Cosmology ([[Philosophy of nature]])
**114 [[Philosophy of space and time|Space]]
**115 [[Philosophy of space and time|Time]]
**116 [[Identity and change|Change]]
**117 Structure
**118 Force & Energy
**119 Number & quantity
*'''120 [[Epistemology]], [[Causality|causation]], humankind'''
**121 Epistemology (Theory of knowledge)
**122 [[Causality|Causation]]
**123 [[Determinism]] & [[indeterminism]]
**124 [[Teleology]]
**''125 Not assigned or no longer used ''
**126 [[Self (philosophy)|The self]]
**127 The unconscious & the subconscious
**128 [[Humankind]]
**129 Origin & destiny of individual souls
*'''130 [[Paranormal]] phenomena'''
**131 Occult methods for achieving well-being
**''132 Not assigned or no longer used ''
**133 [[Parapsychology]] & [[occultism]]
**''134 Not assigned or no longer used ''
**135 [[Dream]]s & mysteries
**''136 Not assigned or no longer used ''
**137 Divinatory [[graphology]]
**138 [[Physiognomy]]
**139 [[Phrenology]]
*'''140 Specific [[:Category:Philosophical movements|philosophical school]]s'''
**141 [[Idealism]] & related systems
**142 [[Critical philosophy]]
**143 [[Intuitionism]] & [[Henri Bergson|Bergsonism]]
**144 [[Humanism]] & related systems
**145 Sensationalism
**146 [[Naturalism (philosophy)|Naturalism]] & related systems
**147 [[Pantheism]] & related systems
**148 [[Liberalism]], [[eclecticism]], [[Traditionalist School|traditionalism]]
**149 Other philosophical systems
*'''150 [[Psychology]]'''
**''151 Not assigned or no longer used ''
**152 [[Perception]], [[Motion (physics)|movement]], [[emotion]]s, [[Motivation|drive]]s
**153 Mental processes & [[intelligence]]
**154 [[Subconscious]] & [[Altered state of consciousness|altered state]]s
**155 [[Differential psychology|Differential]] & [[developmental psychology]]
**156 [[Comparative psychology]]
**''157 Not assigned or no longer used ''
**158 [[Applied psychology]]
**''159 Not assigned or no longer used ''
*'''160 [[Logic]]'''
**161 [[Inductive reasoning|Induction]]
**162 [[Deductive reasoning|Deduction]]
**''163 Not assigned or no longer used ''
**''164 Not assigned or no longer used ''
**165 [[fallacy|Fallacies]] & sources of error
**166 [[Syllogism]]s
**167 [[Hypothesis|Hypotheses]]
**168 [[Logical argument|Argument]] & [[persuasion]]
**169 [[Analogy]]
*'''170 [[Ethics]] (Moral philosophy)'''
**171 [[System]]s & [[doctrine]]s
**172 [[Political]] ethics
**173 Ethics of [[family relationships]]
**174 [[Economic]] & [[professional ethics]]
**175 Ethics of [[recreation]] & [[leisure]]
**176 Ethics of [[sex]] & [[reproduction]]
**177 Ethics of [[social relations]]
**178 Ethics of [[Consumption (economics)|consumption]]
**179 Other ethical norms
*'''180 [[Ancient philosophy|Ancient]], [[medieval philosophy|medieval]], [[Eastern philosophy|Oriental philosophy]]'''
**181 Oriental philosophy
**182 [[Pre-Socratic philosophy|Pre-Socratic Greek philosophies]]
**183 [[Sophism|Sophistic]] & [[socrates|Socratic philosophies]]
**184 [[Platonic philosophy]]
**185 [[Aristotelian philosophy]]
**186 [[Philosophical skepticism|Skeptic]] and [[Neoplatonism|Neoplatonic philosophies]]
**187 [[Epicureanism|Epicurean philosophy]]
**188 [[Stoicism|Stoic philosophy]]
**189 Medieval Western philosophy
*'''190 Modern [[Western philosophy]]''' ([[19th-century philosophy|19th-century]], [[20th-century philosophy|20th-century]])
**191 Modern Western philosophy United States & Canada
**192 Modern Western philosophy British Isles
**193 Modern Western philosophy Germany & Austria
**194 Modern Western philosophy France
**195 Modern Western philosophy Italy
**196 Modern Western philosophy Spain & Portugal
**197 Modern Western philosophy Soviet Union
**198 Modern Western philosophy Scandinavia
**199 Modern Western philosophy Other geographical areas
=== 200 – Religion ===
*'''200 [[Religion]]'''
**201 Religious [[mythology]], general classes of religion, interreligious relations and attitudes, social theology
**202 [[Doctrine]]s
**203 Public [[worship]] and other practices
**204 Religious experience, life, practice
**205 Religious ethics
**206 Leaders and organization
**207 Missions and [[religious education]]
**208 Sources
**209 [[Sect]]s and reform movements
*'''210 [[Natural theology]]'''
**211 [[Conceptions of God|Concepts of God]]
**212 [[Existence of God|Existence]], attributes of God
**213 [[Creation (theology)|Creation]]
**214 [[Theodicy]]
**215 [[Relationship between religion and science|Science & religion]]
**''216 Not assigned or no longer used ''
**''217 Not assigned or no longer used ''
**218 Humankind
**''219 Not assigned or no longer used ''
*'''220 [[Bible]]'''
**221 [[Old Testament]]
**222 Historical books of Old Testament
**223 Poetic books of Old Testament
**224 Prophetic books of Old Testament
**225 [[New Testament]]
**226 [[Gospel]]s & [[Acts of the Apostles|Acts]]
**227 [[Epistles]]
**228 [[Book of Revelation|Revelation]] (Apocalypse)
**229 [[Apocrypha]] & [[List of Old Testament Pseudepigrapha|pseudepigrapha]]
*'''230 Christian theology'''
**231 [[God]]
**232 [[Jesus]] Christ & his family
**233 Humankind
**234 [[Salvation]] ([[Soteriology]]) & grace
**235 Spiritual beings
**236 [[Christian eschatology|Eschatology]]
**''237 Not assigned or no longer used ''
**238 [[Creed]]s & [[catechism]]s
**239 [[Christian apologetics|Apologetics]] & polemics
*'''240 Christian moral & [[Bible study (Christian)|devotional theology]]'''
**241 [[Moral theology]]
**242 Devotional literature
**243 [[Evangelism|Evangelistic]] writings for individuals
**''244 Not assigned or no longer used''
**''245 Not assigned or no longer used''
**246 Use of [[Christian art|art in Christianity]]
**247 [[church (building)|Church]] furnishings & articles
**248 [[Christian worship|Christian experience, practice, life]]
**249 Christian observances in family life
*'''250 Christian [[Holy Orders|orders]] & local [[church]]'''
**251 Preaching ([[Homiletics]])
**252 Texts of [[sermon]]s
**253 Pastoral office ([[Pastoral theology]])
**254 [[Parish]] government & administration
**255 [[Congregation (catholic)|Religious congregations]] & orders
**''256 Not assigned or no longer used ''
**''257 Not assigned or no longer used ''
**''258 Not assigned or no longer used ''
**259 Activities of the local church
*'''260 Christian social theology'''
**261 Social theology
**262 [[Ecclesiology]]
**263 Times, places of [[Liturgical year|religious observance]]
**264 Public worship
**265 [[Sacrament]]s, other rites & acts
**266 [[Mission (Christian)|Missions]]
**267 Associations for religious work
**268 [[Religious education]]
**269 Spiritual renewal
*'''270 Christian church history'''
**271 Religious orders in church history
**272 [[Persecution]]s in church history
**273 [[heresy|Heresies]] in church history
**274 [[Christianity in Europe|Christian church in Europe]]
**275 [[Christianity in Asia|Christian church in Asia]]
**276 [[Christianity in Africa|Christian church in Africa]]
**277 [[Christianity in North America|Christian church in North America]]
**278 [[Christianity in South America|Christian church in South America]]
**279 Christian church in other areas
*'''280 [[Christian denomination]]s & sects'''
**281 [[Early Christianity|Early church]] & [[Eastern Christianity|Eastern churches]]
**282 [[Roman catholicism|Roman Catholic]] Church
**283 [[Anglicanism|Anglican]] churches
**284 [[Protestantism|Protestants]] of Continental origin
**285 [[presbyterianism|Presbyterian]], [[Reformed Church|Reformed]], [[Congregationalism|Congregational]]
**286 [[Baptist]], [[Disciples of Christ]], [[Adventist]]
**287 [[Methodist]] & related churches
**''288 Not assigned or no longer used ''
**289 Other denominations & sects
*'''290 Other & [[comparative religion]]s'''
**291 Comparative religion
**292 Classical ([[Ancient Greek religion|Greek]] & [[Religion in ancient Rome|Roman]]) religion
**293 [[Germanic religion]]
**294 [[Indian religion|Religions of Indic origin]]
**295 [[Zoroastrianism]] (Mazdaism, Parseeism)
**296 [[Judaism]]
**297 [[Islam]] & religions originating in it
**''298 Not assigned or no longer used ''
**299 Other religions
=== 300 – Social sciences ===
*'''300 [[Social science]]s'''
**301 [[Sociology]] & [[anthropology]]
**302 [[Social interaction]]
**303 Social processes
**304 Factors affecting social behavior
**305 [[Social group]]s
**306 [[Culture]] & [[institution]]s
**307 [[Communities]]
**''308 Not assigned or no longer used''
**''309 Not assigned or no longer used''
*'''310 General statistics'''
**''311 Not assigned or no longer used''
**''312 Not assigned or no longer used''
**''313 Not assigned or no longer used''
**314 General statistics Of Europe
**315 General statistics Of Asia
**316 General statistics Of Africa
**317 General statistics Of North America
**318 General statistics Of South America
**319 General statistics Of other parts of the world
*'''320 [[Political science]]'''
**321 [[Form of government|Systems of governments]] & states
**322 Relation of [[state]] to organized groups
**323 [[Civil rights|Civil]] & [[political rights]]
**324 The [[politics|political]] process
**325 International [[Human migration|migration]] & [[colonisation|colonization]]
**326 [[Slavery]] & [[political emancipation|emancipation]]
**327 [[International relations]]
**328 The [[legislation|legislative]] process
**''329 Not assigned or no longer used''
*'''330 [[Economics]]'''
**331 [[Labor economics]]
**332 [[Financial economics]]
**333 [[Land economics]]
**334 [[Cooperative]]s
**335 [[Socialism]] & related systems
**336 [[Public finance]]
**337 [[International economics]]
**338 [[economic production|Production]]
**339 [[Macroeconomics]] & related topics
*'''340 Law'''
**341 [[International law]]
**342 [[constitutional law|Constitutional]] & [[administrative law]]
**343 [[military law|Military]], [[tax law|tax]], [[trade law|trade]], [[industrial law]]
**344 [[social law|Social]], [[labor law|labor]], [[welfare law|welfare]], & related law
**345 [[Criminal law]]
**346 [[Private law]]
**347 [[Civil procedure]] & [[court]]s
**348 [[Law]] (Statutes), [[regulation]]s, [[court case|case]]s
**349 [[:Category:Law by country|Law of specific jurisdictions & areas]]
*'''350 [[Public administration]]'''
**351 Of central governments
**352 Of local governments
**353 of U.S. federal & state governments
**354 Of specific central governments
**355 [[Military science]]
**356 [[infantry|Foot forces]] & warfare
**357 [[Mounted infantry|Mounted forces]] & warfare
**358 Other specialized forces & services
**359 [[Navy|Sea (Naval) forces]] & warfare
*'''360 [[Social services]]; association'''
**361 General social problems & services
**362 [[Social welfare]] problems & services
**363 Other social problems & services
**364 [[Criminology]]
**365 [[penal system|Penal]] & related institutions
**366 [[Voluntary association|Association]]
**367 General [[club]]s
**368 [[Insurance]]
**369 Miscellaneous kinds of associations
*'''370 [[Education]]'''
**371 School management; special education
**372 [[Elementary education]]
**373 [[Secondary education]]
**374 [[Adult education]]
**375 [[Curriculum]]s
**''376 Not assigned or no longer used ''
**''377 Not assigned or no longer used ''
**378 [[Higher education]]
**379 Government regulation, control, support
*'''380 [[Commerce]], [[communication]]s, [[transport]]'''
**381 Internal commerce ([[Domestic trade]])
**382 [[international trade|International commerce]] (Foreign trade)
**383 [[postal system|Postal communication]]
**384 Communications; [[Telecommunication]]
**385 [[rail transportation|Railroad transportation]]
**386 Inland [[waterway]] & [[ferry]] transportation
**387 [[ship transport|Water]], [[aviation|air]], [[space transport]]ation
**388 Transportation; Ground transportation
**'''389 [[Metrology]] & [[standardization]]'''
*'''390 [[Customs]], [[etiquette]], [[folklore]]'''
**391 [[Tradition|Costume]] & [[personal appearance]]
**392 Customs of life cycle & domestic life
**393 [[Funeral|Death customs]]
**394 [[Norm (sociology)|General customs]]
**395 Etiquette ([[Manners]])
**''396 Not assigned or no longer used ''
**''397 Not assigned or no longer used ''
**398 [[Folklore]]
**399 Customs of war & [[diplomacy]]
=== 400 – Language ===
*'''400 [[Language]]'''
**401 [[Philosophy of language|Philosophy]] & theory
**402 Miscellany
**403 [[Dictionary|Dictionaries]] & encyclopedias
**404 Special topics
**405 Serial publications
**406 Organizations & management
**407 [[language education|Education]], research, related topics
**408 With respect to kinds of persons
**409 Geographical & persons treatment
*'''410 [[Linguistics]]'''
**411 [[Writing system]]s
**412 [[Etymology]]
**413 [[lexicology|Dictionaries]]
**414 [[Phonology]]
**415 Structural systems ([[Grammar]])
**''416 Not assigned or no longer used ''
**417 [[Dialectology]] & [[historical linguistics]]
**418 Standard usage; [[Applied linguistics]]
**419 Verbal language not spoken or written
*'''420 [[English language|English]] & [[Old English language|Old English]]'''
**421 English [[English spelling|writing system]] & [[English phonology|phonology]]
**422 English etymology
**423 English dictionaries
**''424 Not assigned or no longer used ''
**425 [[English grammar]]
**''426 Not assigned or no longer used ''
**427 [[dialects of English|English language variations]]
**428 Standard English usage
**429 Old English (Anglo-Saxon)
*'''430 [[Germanic languages]]; [[German language|German]]'''
**431 [[German orthography|German writing system]] & [[German phonology|phonology]]
**432 German etymology
**433 German dictionaries
**''434 Not assigned or no longer used ''
**435 [[German grammar]]
**''436 Not assigned or no longer used ''
**437 [[German dialects|German language variations]]
**438 Standard German usage
**439 Other Germanic languages
*'''440 [[Romance languages]]; [[French language|French]]'''
**441 [[French orthography|French writing system]] & [[French phonology|phonology]]
**442 French etymology
**443 French dictionaries
**''444 Not assigned or no longer used ''
**445 [[French grammar]]
**''446 Not assigned or no longer used ''
**447 [[Dialects of French|French language variations]]
**448 Standard French usage
**449 [[Provençal language|Provencal]] & [[Catalan language|Catalan]]
*'''450 [[italian language|Italian]], [[Romanian language|Romanian]], [[Rhaeto-Romance languages|Rhaeto-Romanic]]'''
**451 Italian writing system & [[Italian phonology|phonology]]
**452 Italian etymology
**453 Italian dictionaries
**''454 Not assigned or no longer used ''
**455 [[Italian grammar]]
**''456 Not assigned or no longer used ''
**457 [[Italian dialects|Italian language variations]]
**458 Standard Italian usage
**459 Romanian & Rhaeto-Romanic
*'''460 [[Spanish language|Spanish]] & [[Portuguese language]]s'''
**461 Spanish [[Spanish orthography|writing system]] & [[Spanish phonology|phonology]]
**462 Spanish etymology
**463 Spanish dictionaries
**''464 Not assigned or no longer used ''
**465 [[Spanish grammar]]
**''466 Not assigned or no longer used ''
**467 [[Spanish dialects and varieties|Spanish language variations]]
**468 Standard Spanish usage
**469 Portuguese
*'''470 [[Italic languages|Italic]]; [[Latin]]'''
**471 [[Classical Latin]] writing & phonology
**472 [[Latin spelling and pronunciation|Classical Latin etymology & phonology]]
**473 Classical Latin dictionaries
**''474 Not assigned or no longer used ''
**475 Classical [[Latin grammar]]
**''476 Not assigned or no longer used ''
**477 [[old Latin|Old]], Postclassical, [[Vulgar Latin]]
**478 Classical Latin usage
**479 Other Italic languages
*'''480 Hellenic languages; [[Ancient Greek|Classical Greek]]'''
**481 Classical Greek writing & [[Ancient Greek phonology|phonology]]
**482 Classical Greek etymology
**483 Classical Greek dictionaries
**''484 Not assigned or no longer used ''
**485 Classical Greek grammar
**''486 Not assigned or no longer used ''
**487 Preclassical & postclassical Greek
**488 Classical Greek usage
**489 Other Hellenic languages
*'''490 Other languages'''
**491 East Indo-European & [[Celtic languages]]
**492 [[Afro-Asiatic languages]]; [[Semitic languages|Semitic]]
**493 Non-Semitic Afro-Asiatic languages
**494 [[Ural-Altaic languages|Ural-Altaic]], [[paleosiberian languages|Paleosiberian]], [[Dravidian languages|Dravidian]]
**495 Languages of East & Southeast Asia
**496 African languages
**497 [[Indigenous languages of the Americas|North American native languages]]
**498 [[Indigenous languages of the Americas|South American native languages]]
**499 Miscellaneous languages
=== 500 – Science ===
*'''500 [[Natural sciences]] & [[mathematics]]'''
**501 Philosophy & theory
**502 Miscellany
**503 Dictionaries & encyclopedias
**''504 Not assigned or no longer used ''
**505 Serial publications
**506 Organizations & management
**507 Education, research, related topics
**508 [[Natural history]]
**509 [[History of science|Historical]], [[:Category:Science and technology by country|areas]], persons treatment
*'''510 Mathematics'''
**511 General principles
**512 [[Algebra]] & [[number theory]]
**513 [[Arithmetic]]
**514 [[Topology]]
**515 [[Mathematical analysis|Analysis]]
**516 [[Geometry]]
**''517 Not assigned or no longer used ''
**518 [[Numerical analysis]]
**519 [[Probabilities]] & [[applied mathematics]]
*'''520 [[Astronomy]] & allied sciences'''
**521 [[Celestial mechanics]]
**522 Techniques, equipment, materials
**523 Specific celestial bodies & phenomena
**''524 Not assigned or no longer used ''
**525 [[Earth]] (Astronomical geography)
**526 Mathematical geography
**527 [[Celestial navigation]]
**528 [[Ephemerides]]
**529 [[Chronology]]
*'''530 [[Physics]]'''
**531 Classical [[mechanics]]; [[Solid mechanics]]
**532 [[Fluid mechanics]]; [[Liquid mechanics]]
**533 Gas mechanics
**534 [[Sound]] & related [[vibrations]]
**535 [[Light]] & paraphotic phenomena
**536 [[Heat]]
**537 [[Electricity]] & [[electronics]]
**538 [[Magnetism]]
**539 Modern physics
*'''540 [[Chemistry]] & allied sciences'''
**541 [[physical chemistry|Physical]] & [[theoretical chemistry]]
**542 Techniques, equipment, materials
**543 [[Analytical chemistry]]
**544 [[Qualitative analysis]]
**545 [[Quantitative analysis (chemistry)|Quantitative analysis]]
**546 [[Inorganic chemistry]]
**547 [[Organic chemistry]]
**548 [[Crystallography]]
**549 [[Mineralogy]]
*'''550 [[Earth sciences]]'''
**551 [[Geology]], [[hydrology]], [[meteorology]]
**552 [[Petrology]]
**553 [[Economic geology]]
**554 Earth sciences of Europe
**555 Earth sciences of Asia
**556 Earth sciences of Africa
**557 Earth sciences of North America
**558 Earth sciences of South America
**559 Earth sciences of other areas
*'''560 [[Paleontology]]; [[Paleozoology]]'''
**561 [[Paleobotany]]
**562 [[Fossil]] invertebrates
**563 Fossil primitive phyla
**564 Fossil Mollusca & Molluscoidea
**565 Other fossil invertebrates
**566 Fossil Vertebrata (Fossil Craniata)
**567 Fossil cold-blooded vertebrates
**568 Fossil Aves (Fossil birds)
**569 Fossil Mammalia
*'''570 [[Life sciences]]'''
**571 [[Physiology]]
**572 [[Biochemistry]]
**573 Physiological systems of [[animal]]s
**''574 Not assigned or no longer used''
**575 [[Plant physiology|Physiological systems of plants]]
**576 [[Genetics]] and [[evolution]]
**577 [[Ecology]]
**578 [[Natural history]] of [[organism]]s
**579 [[Microbiology|microorganisms]], [[fungus|fungi]], [[algae]]
*'''580 Plants'''
**581 [[Botany]]
**582 [[Plant]]s noted for specific vegetative characteristics and [[flower]]s
**583 [[Dicotyledon]]es
**584 [[Monocotyledon]]es
**585 Gymnospermae ([[Pinophyta]])
**586 [[Cryptogams|Cryptogamia]] (Seedless plants)
**587 [[Pteridophyta]] (Vascular cryptogams)
**588 [[Bryophyte|Bryophyta]]
**''589 Not assigned or no longer used''
*'''590 Zoological sciences'''
**591 [[Zoology]]
**592 [[Invertebrate]]s
**593 [[Protozoa]], [[Echinoderm]]ata, related phyla
**594 [[Mollusc]]a & Molluscoidea
**595 Other [[invertebrate]]s
**596 Vertebrata ([[Craniata]], [[Vertebrate]]s)
**597 Cold-blooded vertebrates, [[fish]]es
**598 [[bird|Aves]] (Birds)
**599 [[Mammal]]ia (Mammals)
=== 600 – Technology ===
*'''600 [[Technology]] (Applied sciences)'''
**601 Philosophy & theory
**602 Miscellany
**603 Dictionaries & encyclopedias
**604 Special topics
**605 Serial publications
**606 Organizations
**607 Education, research, related topics
**608 [[Invention]] & [[patent]]s
**609 [[History of technology|Historical]], areas, persons treatment
*'''610 Medical sciences; [[Medicine]]'''
**611 [[Human anatomy]], [[cytology]], [[histology]]
**612 [[Human physiology]]
**613 Promotion of [[health]]
**614 Incidence & prevention of disease
**615 [[Pharmacology]] & [[therapeutics]]
**616 [[Disease]]s
**617 [[Surgery]] & related medical specialties
**618 [[Gynecology]] & other medical specialties
**619 [[Experimental medicine]]
*'''620 [[Engineering]] & allied operations'''
**621 [[Applied physics]]
**622 [[Mining]] & related operations
**623 [[Military engineer|Military]] & [[nautical engineering]]
**624 [[Civil engineering]]
**625 Engineering of [[railroad]]s, [[road]]s
**''626 Not assigned or no longer used ''
**627 [[Hydraulic engineering]]
**628 Sanitary & municipal engineering
**629 Other branches of engineering
*'''630 [[Agriculture]]'''
**631 Techniques, [[:Category:Agricultural machinery|equipment]], materials
**632 Plant injuries, [[:Category:Plant pathogens and diseases|diseases]], [[Pest (organism)|pest]]s
**633 [[Field (agriculture)|Field]] & plantation [[crop (agriculture)|crop]]s
**634 [[Orchard]]s, [[fruit]]s, [[forestry]]
**635 Garden crops ([[Horticulture]])
**636 [[Animal husbandry]]
**637 Processing [[dairy]] & related products
**638 Insect culture
**639 [[Hunting]], [[fishing]], [[Wildlife conservation|conservation]]
*'''640 [[Home economics]] & family living'''
**641 [[Food]] & [[drink]]
**642 [[Meal]]s & table service
**643 [[Housing]] & household equipment
**644 [[Household]] utilities
**645 [[Furniture|Household furnishings]]
**646 [[Sewing]], [[clothing]], personal living
**647 [[Household management|Management of public household]]s
**648 [[Household chore|Housekeeping]]
**649 [[Child rearing]] & [[home care]] of sick
*'''650 [[Management]] & auxiliary services'''
**651 [[Office]] services
**652 Processes of written communication
**653 [[Shorthand]]
**''654 Not assigned or no longer used ''
**''655 Not assigned or no longer used ''
**''656 Not assigned or no longer used ''
**657 [[Accounting]]
**658 General management
**659 [[Advertising]] & [[public relations]]
*'''660 [[Chemical engineering]]'''
**661 Industrial chemicals technology
**662 [[Explosives]], [[fuels]] technology
**663 Beverage technology
**664 [[Food technology]]
**665 Industrial [[oil]]s, [[fat]]s, [[wax]]es, gases
**666 [[Ceramic]] & allied technologies
**667 [[washing|Cleaning]], [[pigment|color]], related technologies
**668 Technology of other organic products
**669 [[Metallurgy]]
*'''670 [[Manufacturing]]'''
**671 [[Metalworking]] & metal products
**672 [[Iron]], [[steel]], other [[:Category:Ferrous alloys|iron alloy]]s
**673 Nonferrous [[metal]]s
**674 [[Timber|Lumber]] processing, [[wood]] products, [[cork (material)|cork]]
**675 [[Leather]] & [[fur]] processing
**676 [[Pulp and paper industry|Pulp & paper technology]]
**677 [[Textile]]s
**678 [[Elastomer]]s & elastomer products
**679 Other products of specific materials
*'''680 Manufacture for specific uses'''
**681 [[Precision instrument]]s & other devices
**682 Small [[forge]] work ([[Blacksmith]]ing)
**683 [[Hardware]] & [[:category:Home appliances|household appliances]]
**684 Furnishings & home [[workshop]]s
**685 Leather, fur, related products
**686 [[Printing]] & related activities
**687 Clothing
**688 Other final products & [[packaging]]
**''689 Not assigned or no longer used ''
*'''690 [[Building]]s'''
**691 Building [[material]]s
**692 Auxiliary construction practices
**693 Specific materials & purposes
**694 Wood construction; [[Carpentry]]
**695 [[Roof]] covering
**696 Utilities
**697 [[HVAC|Heating]], [[ventilating]], [[air-conditioning]]
**698 Detail finishing
**''699 Not assigned or no longer used''
=== 700 – Arts and recreation ===
*'''700 The [[arts]]'''
**701 [[Philosophy of art|Philosophy]] & [[Aesthetics|theory]]
**702 Miscellany
**703 Dictionaries & encyclopedias
**704 Special topics
**705 [[:Category:Art magazines|Serial publications]]
**706 Organizations & management
**707 Education, research, related topics
**708 [[:Category:Art museums and galleries|Galleries, museums, private collections]]
**709 [[Art history|Historical]], areas, persons treatment
*'''710 Civic & [[landscape art]]'''
**711 [[urbanism|Area planning]] (Civic art)
**712 [[Landscape architecture]]
**713 Landscape architecture of trafficways
**714 [[water body|Water]] features
**715 [[tree|Woody plants]]
**716 [[Herbaceous]] plants
**717 Structures
**718 Landscape design of cemeteries
**719 Natural [[landscape]]s
*'''720 [[Architecture]]'''
**721 [[building|Architectural structure]]
**722 Architecture to ca. 300
**723 Architecture from ca. 300 to 1399
**724 Architecture from 1400
**725 Public structures
**726 [[religious architecture|Buildings for religious purposes]]
**727 Buildings for education & research
**728 [[house|Residential & related buildings]]
**729 [[Design]] & [[Painter and decorator|decoration]]
*'''730 [[Plastic arts]]; [[Sculpture]]'''
**731 Processes, forms, subjects of sculpture
**732 Sculpture to ca. 500
**733 [[Classical sculpture|Greek, Etruscan, Roman sculpture]]
**734 Sculpture from ca. 500 to 1399
**735 Sculpture from 1400
**736 [[Stone carving|Carving]] & carvings
**737 [[Numismatics]] & [[sigillography]]
**738 [[Ceramics (art)|Ceramic arts]]
**739 Art metalwork
*'''740 [[Drawing]] & [[decorative art]]s'''
**741 Drawing & drawings
**742 [[Perspective (graphical)]]
**743 Drawing & drawings by subject
**''744 Not assigned or no longer used ''
**745 Decorative arts
**746 [[Textile art]]s
**747 [[Interior decoration]]
**748 [[Glass]]
**749 [[Furniture]] & accessories
*'''750 [[Painting]] & [[:Category:Paintings|paintings]]'''
**751 Techniques, equipment, forms
**752 [[Color]]
**753 [[Symbolism]], [[allegory]], [[mythology]], [[legend]]
**754 [[Painting style|Genre paintings]]
**755 [[iconography|Religion & religious symbolism]]
**''756 Not assigned or no longer used ''
**757 Human figures & their parts
**758 Other subjects
**759 [[History of painting|Historical]], areas, persons treatment
*'''760 [[Graphic arts]]; [[Printmaking]] & prints'''
**761 Relief processes ([[Block printing]])
**''762 Not assigned or no longer used ''
**763 [[lithography|Lithographic]] (Planographic) processes
**764 [[Chromolithography]] & [[serigraphy]]
**765 Metal [[engraving]]
**766 [[Mezzotint]]ing & related processes
**767 [[Etching]] & [[drypoint]]
**''768 Not assigned or no longer used ''
**769 Prints
*'''770 [[Photography]] & photographs'''
**771 [[:Category:Photographic techniques|Techniques]], [[:Category:Photography equipment|equipment]], materials
**772 Metallic salt processes
**773 Pigment processes of printing
**774 [[Holography]]
**775 [[Digital photography]]
**776 [[Computer art]]
**''777 Not assigned or no longer used ''
**778 [[:Category:Photography by genre|Fields & kinds of photography]]
**779 [[:Category:Photographs|Photographs]]
*'''780 [[Music]]'''
**781 [[Music theory|General principles]] & [[musical form]]s
**782 [[Vocal music]]
**783 Music for single voices; The [[human voice|voice]]
**784 [[musical instrument|Instrument]]s & [[Musical ensemble|Instrumental ensembles]]
**785 [[Chamber music]]
**786 [[keyboard instrument|Keyboard]] & other instruments
**787 [[String instrument|Stringed instruments]] (Chordophones)
**788 [[Wind instrument]]s (Aerophones)
**''789 Not assigned or no longer used ''
*'''790 Recreational & [[performing arts]]'''
**791 Public performances
**792 Stage presentations
**793 [[Indoor game]]s & amusements
**794 Indoor games of skill
**795 [[gambling|Games of chance]]
**796 Athletic & outdoor sports & games
**797 Aquatic & air sports
**798 [[Equestrian sports]] & animal racing
**799 [[Fishing]], [[hunting]], [[shooting]]
=== 800 – Literature ===
*'''800 [[Literature]] & [[rhetoric]]'''
**801 Philosophy & theory
**802 Miscellany
**803 Dictionaries & encyclopedias
**''804 Not assigned or no longer used ''
**805 [[Literary magazine|Serial publications]]
**806 Organizations
**807 Education, research, related topics
**808 Rhetoric & collections of literature
**809 [[history of literature|Literary history]] & [[literary criticism|criticism]]
*'''810 [[American literature]] in English'''
**811 [[Poetry of the United States|Poetry]]
**812 Drama
**813 Fiction
**814 Essays
**815 Speeches
**816 Letters
**817 Satire & humor
**818 Miscellaneous writings
**''819 Not assigned or no longer used ''
*'''820 [[English literature|English]] & [[Old English literature]]s'''
**821 [[English poetry]]
**822 [[English drama]]
**823 English fiction
**824 English essays
**825 English speeches
**826 English letters
**827 English satire & humor
**828 English miscellaneous writings
**829 Old English (Anglo-Saxon)
*'''830 Literatures of Germanic languages'''
**831 German poetry
**832 German drama
**833 German fiction
**834 German essays
**835 German speeches
**836 German letters
**837 German satire & humor
**838 German miscellaneous writings
**839 Other Germanic literatures
*'''840 Literatures of Romance languages'''
**841 [[French poetry]]
**842 French drama
**843 French fiction
**844 French essays
**845 French speeches
**846 French letters
**847 French satire & humor
**848 French miscellaneous writings
**849 Provencal & Catalan
*'''850 [[Italian literature|Italian]], [[romanian literature|Romanian]], [[Swiss literature#Romansh and Ladin branch|Rhaeto-Romanic]]'''
**851 [[Italian poetry]]
**852 Italian drama
**853 Italian fiction
**854 Italian essays
**855 Italian speeches
**856 Italian letters
**857 Italian satire & humor
**858 Italian miscellaneous writings
**859 Romanian & Rhaeto-Romanic
*'''860 [[Spanish literature|Spanish]] & [[Portuguese literature]]s'''
**861 [[Spanish poetry]]
**862 Spanish drama
**863 Spanish fiction
**864 Spanish essays
**865 Spanish speeches
**866 Spanish letters
**867 Spanish satire & humor
**868 Spanish miscellaneous writings
**869 Portuguese
*'''870 Italic literatures; [[latin literature|Latin]]'''
**871 [[Latin poetry]]
**872 Latin dramatic poetry & drama
**873 Latin epic poetry & fiction
**874 Latin lyric poetry
**875 Latin speeches
**876 Latin letters
**877 Latin satire & humor
**878 Latin miscellaneous writings
**879 Literatures of other Italic languages
*'''880 Hellenic literatures; Classical Greek'''
**881 Classical Greek poetry
**882 Classical Greek drama
**883 Classical Greek epic poetry & fiction
**884 Classical Greek lyric poetry
**885 Classical Greek speeches
**886 Classical Greek letters
**887 Classical Greek satire & humor
**888 Classical Greek miscellaneous writings
**889 [[Greek literature|Modern Greek]]
*'''890 Literatures of other languages'''
**891 East Indo-European & Celtic
**892 Afro-Asiatic literatures Semitic
**893 Non-Semitic Afro-Asiatic literatures
**894 Ural-Altaic, Paleosiberian, Dravidian
**895 Literatures of East & Southeast Asia
**896 African literatures
**897 North American native literatures
**898 South American native literatures
**899 Other literatures
=== 900 – History and geography and biography===
*'''900 [[Geography]] & [[history]]'''
**901 Philosophy & theory
**902 Miscellany
**903 Dictionaries & encyclopedias
**904 Collected accounts of events
**905 Serial publications
**906 Organizations & management
**907 Education, research, related topics
**908 With respect to kinds of persons
**909 [[World history]]
*'''910 Geography & [[travel]]'''
**911 [[Historical geography]]
**912 [[map|Graphic representations of earth]]
**913 [[Ancient world]]
**914 [[Europe]]
**915 [[Asia]]
**916 [[Africa]]
**917 [[North America]]
**918 [[South America]]
**919 Other areas
*'''920 [[Biography]], [[genealogy]], [[insignia]]'''
**''921 Not assigned or no longer used ''
**''922 Not assigned or no longer used ''
**''923 Not assigned or no longer used ''
**''924 Not assigned or no longer used ''
**''925 Not assigned or no longer used ''
**''926 Not assigned or no longer used ''
**''927 Not assigned or no longer used ''
**''928 Not assigned or no longer used ''
***The 921-928 range is reserved as an optional location for biographies
**929 Genealogy, [[name]]s, insignia
*'''930 [[Ancient history|History of ancient world]]'''
**931 History of ancient world; [[Ancient China|China]]
**932 History of ancient world; [[Ancient Egypt|Egypt]]
**933 History of ancient world; [[History of Palestine|Palestine]]
**934 History of ancient world; [[History of India|India]]
**935 History of ancient world; [[Mesopotamia]] & Iranian Plateau
**936 History of ancient world; [[Prehistoric Europe|Europe north & west of Italy]]
**937 History of ancient world; [[Ancient Rome|Italy & adjacent territories]]
**938 History of ancient world; [[Ancient Greece|Greece]]
**939 History of ancient world; Other parts of ancient world
*''' 940 General [[history of Europe]]'''
**941 General history of Europe; [[History of the British Isles|British Isles]]
**942 General history of Europe; [[History of England|England]] & [[History of Wales|Wales]]
**943 General history of Europe; [[Central Europe]] [[History of Germany|Germany]]
**944 General history of Europe; [[History of France|France]] & [[History of Monaco|Monaco]]
**945 General history of Europe; [[History of Italy|Italian Peninsula]] & adjacent islands
**946 General history of Europe; [[Iberian Peninsula#History|Iberian Peninsula]] & adjacent islands
**947 General history of Europe; [[Eastern Europe]]; [[History of the Soviet Union|Soviet Union]]
**948 General history of Europe; [[Northern Europe]]; [[History of Scandinavia|Scandinavia]]
**949 General history of Europe; Other parts of Europe
*'''950 General [[history of Asia]]; Far East'''
**951 General history of Asia; [[History of China|China]] & adjacent areas
**952 General history of Asia; [[History of Japan|Japan]]
**953 General history of Asia; [[Arabian Peninsula]] & adjacent areas
**954 General history of Asia; [[History of South Asia|South Asia]]; [[History of India|India]]
**955 General history of Asia; [[History of Iran|Iran]]
**956 General history of Asia; [[History of the Middle East|Middle East]] (Near East)
**957 General history of Asia; [[History of Siberia|Siberia]] (Asiatic Russia)
**958 General history of Asia; [[History of Central Asia|Central Asia]]
**959 General history of Asia; [[History of Southeast Asia|Southeast Asia]]
*''' 960 General [[history of Africa]]'''
**961 General history of Africa; [[History of Tunisia|Tunisia]] & [[History of Libya|Libya]]
**962 General history of Africa; [[History of Egypt|Egypt]] & [[History of Sudan|Sudan]]
**963 General history of Africa; [[History of Ethiopia|Ethiopia]]
**964 General history of Africa; [[History of Morocco|Morocco]] & [[Canary Islands#History|Canary Islands]]
**965 General history of Africa; [[History of Algeria|Algeria]]
**966 General history of Africa; [[History of West Africa|West Africa]] & offshore islands
**967 General history of Africa; [[Central Africa]] & offshore islands
**968 General history of Africa; [[Southern Africa]]
**969 General history of Africa; South Indian Ocean islands
*''' 970 General [[history of North America]]'''
**971 General history of North America; [[History of Canada|Canada]]
**972 General history of North America; [[History of Central America|Middle America]]; [[History of Mexico|Mexico]]
**973 General history of North America; [[History of the United States|United States]]
**974 General history of North America; [[Northeastern United States#History|Northeastern United States]]
**975 General history of North America; Southeastern United States
**976 General history of North America; South central United States
**977 General history of North America; North central United States
**978 General history of North America; Western United States
**979 General history of North America; Great Basin & Pacific Slope
*''' 980 General [[history of South America]]'''
**981 General history of South America; [[History of Brazil|Brazil]]
**982 General history of South America; [[History of Argentina|Argentina]]
**983 General history of South America; [[History of Chile|Chile]]
**984 General history of South America; [[History of Bolivia|Bolivia]]
**985 General history of South America; [[History of Peru|Peru]]
**986 General history of South America; [[History of Colombia|Colombia]] & [[History of Ecuador|Ecuador]]
**987 General history of South America; [[History of Venezuela|Venezuela]]
**988 General history of South America; [[History of Guyana|Guiana]]
**989 General history of South America; [[history of Paraguay|Paraguay]] & [[History of Uruguay|Uruguay]]
*''' 990 General history of other areas'''
**''991 Not assigned or no longer used ''
**''992 Not assigned or no longer used ''
**993 General history of other areas; [[History of New Zealand|New Zealand]]
**994 General history of other areas; [[History of Australia|Australia]]
**995 General history of other areas; [[Melanesia]]; [[History of Papua New Guinea|New Guinea]]
**996 General history of other areas; Other parts of Pacific [[Polynesia]]
**997 General history of other areas; Atlantic Ocean islands
**998 General history of other areas; Arctic islands & [[History of Antarctica|Antarctica]]
**999 Extraterrestrial worlds
== Editions and publication ==
[[OCLC]] owns the rights to the Dewey Decimal System. It is updated by ten librarians stationed in the [[Library of Congress]]. The changes and editions are published every five years. The most recent edition is DDC 22 and the next edition is planned for 2008.
== See also ==
*[[Dewey Decimal Classification|Dewey Decimal Classification System]]
*[[Library of Congress Classification|Library of Congress Classification System]]
*[[OCLC]]
*[[WorldCat]]
== References ==
*{{cite book
| author = OCLC Incorporated
| title = Dewey Decimal Classification and Relative Index
| url = http://www.oclc.org/dewey/resources/summaries/deweysummaries.pdf
| format = pdf
| accessdate = 2007-11-11
| edition = 22
| year = 2003
| publisher = OCLC
| location = Dublin, OH
| isbn = 0-910608-71-7
}}
== External links ==
*[http://www.oclc.org/dewey/about/default.htm OCLC Website]
[[Category:Library cataloging and classification|Dewey Decimal classes]]