The Dewey Decimal Classification is a system of library classification made up of ten classes, each divided into ten divisions, each having ten sections (although there are only 99 divisions and 908 sections in total, as some are no longer in use or have not been assigned).

000 - Computer science, information & general works

000 Computer science, knowledge & systems
- 000 Computer science, knowledge & general works
- 001 Knowledge
- 002 The book
- 003 Systems
- 004 Data processing & computer science
- 005 Computer programming, programs & data
- 006 Special computer methods
- 007 [Unassigned]
- 008 [Unassigned]
- 009 [Unassigned]
010 Bibliographies
- 010 Bibliography
- 011 Bibliographies
- 012 Bibliographies of individuals
- 013 [Unassigned]
- 014 Of anonymous & pseudonymous works
- 015 Bibliographies of works from specific places
- 016 Bibliographies of works on specific subjects
- 017 General subject catalogs
- 018 Catalogs arranged by author, date, etc.
- 019 Dictionary catalogs
020 Library & information sciences
- 020 Library & information sciences
- 021 Library relationships
- 022 Administration of physical plant
- 023 Personnel management
- 024 No longer used-formerly Regulations for readers
- 025 Library operations
- 026 Libraries for specific subjects
- 027 General libraries
- 028 Reading & use of other information media
- 029 No longer used-formerly Literary methods
030 Encyclopedias & books of facts
- 030 General encyclopedic works
- 031 Encyclopedias in American English
- 032 Encyclopedias in English
- 033 In other Germanic languages
- 034 Encyclopedias in French, Occitan & Catalan
- 035 In Italian, Romanian & related languages
- 036 Encyclopedias in Spanish & Portuguese
- 037 Encyclopedias in Slavic languages
- 038 Encyclopedias in Scandinavian languages
- 039 Encyclopedias in other languages
040 No longer used-formerly Collected essays by language
- 040 [Unassigned]
- 041 [Unassigned]
- 042 [Unassigned]
- 043 [Unassigned]
- 044 [Unassigned]
- 045 [Unassigned]
- 046 [Unassigned]
- 047 [Unassigned]
- 048 [Unassigned]
- 049 [Unassigned]
050 Magazines, journals & serials
- 050 General serial publications
- 051 Serials in American English
- 052 Serials in English
- 053 Serials in other Germanic languages
- 054 Serials in French, Occitan & Catalan
- 055 In Italian, Romanian & related languages
- 056 Serials in Spanish & Portuguese
- 057 Serials in Slavic languages
- 058 Serials in Scandinavian languages
- 059 Serials in other languages
060 Associations, organizations & museums
- 060 General organizations & museology
- 061 Organizations in North America
- 062 Organizations in British Isles; in England
- 063 Organizations in central Europe; in Germany
- 064 Organizations in France & Monaco
- 065 Organizations in Italy & adjacent islands
- 066 In Iberian Peninsula & adjacent islands
- 067 Organizations in eastern Europe; in Russia
- 068 Organizations in other geographic areas
- 069 Museum science
070 News media, journalism & publishing
- 070 News media, journalism & publishing
- 071 Newspapers in North America
- 072 Newspapers in British Isles; in England
- 073 Newspapers in central Europe; in Germany
- 074 Newspapers in France & Monaco
- 075 Newspapers in Italy & adjacent islands
- 076 In Iberian Peninsula & adjacent islands
- 077 Newspapers in eastern Europe; in Russia
- 078 Newspapers in Scandinavia
- 079 Newspapers in other geographic areas
080 General collections
- 080 General collections
- 081 Collections in American English
- 082 Collections in English
- 083 Collections in other Germanic languages
- 084 Collections in French, Occitan & Catalan
- 085 In Italian, Romanian & related languages
- 086 Collections in Spanish & Portuguese
- 087 Collections in Slavic languages
- 088 Collections in Scandinavian languages
- 089 Collections in other languages
090 Manuscripts & rare books
- 090 Manuscripts & rare books
- 091 Manuscripts
- 092 Block books
- 093 Incunabula
- 094 Printed books
- 095 Books notable for bindings
- 096 Books notable for illustrations
- 097 Books notable for ownership or origin
- 098 Prohibited works, forgeries & hoaxes
- 099 Books notable for format

100 Philosophy
- 100 Miscellany of philosophy & psychology
- 101 Theory of philosophy
- 102 Miscellany of philosophy
- 103 Dictionaries of philosophy
- 104 No longer used-formerly Essays
- 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
- 110 Metaphysics
- 111 Ontology
- 112 No longer used-formerly Methodology
- 113 Cosmology (Philosophy of nature)
- 114 Space
- 115 Time
- 116 Change
- 117 Structure
- 118 Force & Energy
- 119 Number & quantity
120 Epistemology, causation, humankind
- 120 Epistemology, causation & humankind
- 121 Epistemology (Theory of knowledge)
- 122 Causation
- 123 Determinism & indeterminism
- 124 Teleology
- 125 No longer used-formerly Infinity
- 126 The self
- 127 The unconscious & the subconscious
- 128 Humankind
- 129 Origin & destiny of individual souls
130 Paranormal phenomena
- 130 Parapsychology & occultism
- 131 Occult methods for achieving well-being
- 132 No longer used-formerly Mental derangements
- 133 Parapsychology & occultism
- 134 No longer used-formerly Mesmerism and Clairvoyance
- 135 Dreams & mysteries
- 136 No longer used-formerly Mental characteristics
- 137 Divinatory graphology
- 138 Physiognomy
- 139 Phrenology
140 Specific philosophical schools
- 140 Specific philosophical schools
- 141 Idealism & related systems
- 142 Critical philosophy
- 143 Intuitionism & Bergsonism
- 144 Humanism & related systems
- 145 Sensationalism
- 146 Naturalism & related systems
- 147 Pantheism & related systems
- 148 Liberalism, eclecticism, traditionalism
- 149 Other philosophical systems
150 Psychology
- 150 Psychology
- 151 No longer used-formerly Intellect
- 152 Perception, movement, emotions, drives
- 153 Mental processes & intelligence
- 154 Subconscious & altered states
- 155 Differential & developmental psychology
- 156 Comparative psychology
- 157 No longer used-formerly Emotions
- 158 Applied psychology
- 159 No longer used-formerly Will
160 Logic
- 160 Logic
- 161 Induction
- 162 Deduction
- 163 Not assigned or no longer used
- 164 Not assigned or no longer used
- 165 Fallacies & sources of error
- 166 Syllogisms
- 167 Hypotheses
- 168 Argument & persuasion
- 169 Analogy
170 Ethics (Moral philosophy)
- 170 Ethics
- 171 Systems & doctrines
- 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
- 179 Other ethical norms
180 Ancient, medieval, Oriental philosophy
- 180 Ancient, medieval & eastern philosophy
- 181 Oriental philosophy
- 182 Pre-Socratic Greek philosophies
- 183 Sophistic & Socratic philosophies
- 184 Platonic philosophy
- 185 Aristotelian philosophy
- 186 Skeptic and Neoplatonic philosophies
- 187 Epicurean philosophy
- 188 Stoic philosophy
- 189 Medieval Western philosophy
190 Modern Western philosophy (19th-century, 20th-century)
- 190 Modern western philosophy
- 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
- 200 Religion
- 201 Religious mythology, general classes of religion, interreligious relations and attitudes, social theology
- 202 Doctrines
- 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 Sects and reform movements
210 Natural theology
- 211 Concepts of God
- 212 Existence, attributes of God
- 213 Creation
- 214 Theodicy
- 215 Science & religion
- 216 No longer used-formerly Evil
- 217 No longer used-formerly Prayer
- 218 Humankind
- 219 No longer used-formerly Analogies
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 Gospels & Acts
- 227 Epistles
- 228 Revelation (Apocalypse)
- 229 Apocrypha & pseudepigrapha
230 Christian theology
- 231 God
- 232 Jesus Christ & his family
- 233 Humankind
- 234 Salvation (Soteriology) & grace
- 235 Spiritual beings
- 236 Eschatology
- 237 No longer used-formerly Future state
- 238 Creeds & catechisms
- 239 Apologetics & polemics
240 Christian moral & devotional theology
- 241 Moral theology
- 242 Devotional literature
- 243 Evangelistic writings for individuals
- 244 No longer used-formerly Religious fiction
- 245 No longer used-formerly Hymnology
- 246 Use of art in Christianity
- 247 Church furnishings & articles
- 248 Christian experience, practice, life
- 249 Christian observances in family life
250 Christian orders & local church
- 251 Preaching (Homiletics)
- 252 Texts of sermons
- 253 Pastoral office (Pastoral theology)
- 254 Parish government & administration
- 255 Religious congregations & orders
- 256 No longer used-formerly Religious societies
- 257 No longer used-formerly Parochial schools, libraries, etc.
- 258 No longer used-formerly Parochial medicine
- 259 Activities of the local church
260 Christian social theology
- 261 Social theology
- 262 Ecclesiology
- 263 Times, places of religious observance
- 264 Public worship
- 265 Sacraments, other rites & acts
- 266 Missions
- 267 Associations for religious work
- 268 Religious education
- 269 Spiritual renewal
270 Christian church history
- 271 Religious orders in church history
- 272 Persecutions in church history
- 273 Heresies in church history
- 274 Christian church in Europe
- 275 Christian church in Asia
- 276 Christian church in Africa
- 277 Christian church in North America
- 278 Christian church in South America
- 279 Christian church in other areas
280 Christian denominations & sects
- 281 Early church & Eastern churches
- 282 Roman Catholic Church
- 283 Anglican churches
- 284 Protestants of Continental origin
- 285 Presbyterian, Reformed, Congregational
- 286 Baptist, Disciples of Christ, Adventist
- 287 Methodist & related churches
- 288 No longer used-formerly Unitarian
- 289 Other denominations & sects
290 Other & comparative religions
- 291 Comparative religion
- 292 Classical (Greek & Roman) religion
- 293 Germanic religion
- 294 Religions of Indian origin
- 295 Zoroastrianism (Mazdaism, Parseeism)
- 296 Judaism
- 297 Islam, Bábism & Bahá'í Faith
- 298 No longer used-formerly Mormonism
- 299 Other religions

300 - Social sciences

300 Social sciences, sociology & anthropology
- 300 Social sciences
- 301 Sociology & anthropology
- 302 Social interaction
- 303 Social processes
- 304 Factors affecting social behavior
- 305 Social groups
- 306 Culture & institutions
- 307 Communities
- 308 No longer used-formerly Polygraphy
- 309 No longer used-formerly History of sociology
310 General statistics
- 311 No longer used-formerly Theory and methods
- 312 No longer used-formerly Population
- 313 No longer used-formerly Special topics
- 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 Systems of governments & states
- 322 Relation of state to organized groups
- 323 Civil & political rights
- 324 The political process
- 325 International migration & colonization
- 326 Slavery & emancipation
- 327 International relations
- 328 The legislative process
- 329 Not assigned or no longer used
330 Economics
- 331 Labor economics
- 332 Financial economics
- 333 Land economics
- 334 Cooperatives
- 335 Socialism & related systems
- 336 Public finance
- 337 International economics
- 338 Production
- 339 Macroeconomics & related topics
340 Law
- 341 International law
- 342 Constitutional & administrative law
- 343 Military, tax, trade, industrial law
- 344 Social, labor, welfare, & related law
- 345 Criminal law
- 346 Private law
- 347 Civil procedure & courts
- 348 Law (Statutes), regulations, cases
- 349 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 Foot forces & warfare
- 357 Mounted forces & warfare
- 358 Other specialized forces & services
- 359 Sea (Naval) forces & warfare
360 Social services; association
- 361 General social problems
- 362 Social welfare problems & services
- 363 Other social problems & services
- 364 Criminology
- 365 Penal & related institutions
- 366 Association
- 367 General clubs
- 368 Insurance
- 369 Miscellaneous kinds of associations
370 Education
- 371 School management; special education
- 372 Elementary education
- 373 Secondary education
- 374 Adult education
- 375 Curriculums
- 376 No longer used-formerly Education of women
- 377 No longer used-formerly Ethical education
- 378 Higher education
- 379 Government regulation, control, support
380 Commerce, communications, transport
- 381 Internal commerce (Domestic trade)
- 382 International commerce (Foreign trade)
- 383 Postal communication
- 384 Communications; Telecommunication
- 385 Railroad transportation
- 386 Inland waterway & ferry transportation
- 387 Water, air, space transportation
- 388 Transportation; Ground transportation
- 389 Metrology & standardization
390 Customs, etiquette, folklore
- 391 Costume & personal appearance
- 392 Customs of life cycle & domestic life
- 393 Death customs
- 394 General customs
- 395 Etiquette (Manners)
- 396 No longer used-formerly Women's position and treatment
- 397 No longer used-formerly outcast studies
- 398 Folklore
- 399 Customs of war & diplomacy

400 - Language

400 Language
- 400 Language
- 401 Philosophy & theory
- 402 Miscellany
- 403 Dictionaries & encyclopedias
- 404 Special topics
- 405 Serial publications
- 406 Organizations & management
- 407 Education, research, related topics
- 408 With respect to kinds of persons
- 409 Geographical & persons treatment
410 Linguistics
- 411 Writing systems
- 412 Etymology
- 413 Dictionaries
- 414 Phonology
- 415 Structural systems (Grammar)
- 416 No longer used-formerly Prosody (linguistics)
- 417 Dialectology & historical linguistics
- 418 Standard usage; Applied linguistics
- 419 Verbal language not spoken or written
420 English & Old English
- 421 English writing system & phonology
- 422 English etymology
- 423 English dictionaries
- 424 No longer used-formerly English thesauruses
- 425 English grammar
- 426 No longer used-formerly English prosodies
- 427 English language variations
- 428 Standard English usage
- 429 Old English (Anglo-Saxon)
430 Germanic languages; German
- 431 German writing system & 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 language variations
- 438 Standard German usage
- 439 Other Germanic languages
440 Romance languages; French
- 441 French writing system & 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 French language variations
- 448 Standard French usage
- 449 Provençal & Catalan
450 Italian, Romanian, Rhaeto-Romanic
- 451 Italian writing system & 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 language variations
- 458 Standard Italian usage
- 459 Romanian & Rhaeto-Romanic
460 Spanish & Portuguese languages
- 461 Spanish writing system & 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 language variations
- 468 Standard Spanish usage
- 469 Portuguese
470 Italic; Latin
- 471 Classical Latin writing & phonology
- 472 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, Postclassical, Vulgar Latin
- 478 Classical Latin usage
- 479 Other Italic languages
480 Hellenic languages; Classical Greek
- 481 Classical Greek writing & 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
- 493 Non-Semitic Afro-Asiatic languages
- 494 Ural-Altaic, Paleosiberian, Dravidian
- 495 Languages of East & Southeast Asia
- 496 African languages
- 497 North American native languages
- 498 South American native languages
- 499 Miscellaneous languages

500 - Science

500 Sciences
- 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 Historical, geographic, persons treatment
510 Mathematics
- 511 General principles
- 512 Algebra & number theory
- 513 Arithmetic
- 514 Topology
- 515 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 & theoretical chemistry
- 542 Techniques, equipment, materials
- 543 Analytical chemistry
- 544 Qualitative analysis
- 545 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 animals
- 574 Not assigned or no longer used
- 575 Physiological systems of plants
- 576 Genetics and evolution
- 577 Ecology
- 578 Natural history of organisms
- 579 Microorganisms, fungi, algae
580 Plants
- 581 Botany
- 582 Plants noted for specific vegetative characteristics and flowers
- 583 Dicotyledones
- 584 Monocotyledones
- 585 Gymnospermae (Pinophyta)
- 586 Cryptogamia (Seedless plants)
- 587 Pteridophyta (Vascular cryptogams)
- 588 Bryophyta
- 589 Not assigned or no longer used
590 Zoological sciences/Animals
- 591 Zoology
- 592 Invertebrates
- 593 Protozoa, Echinodermata, related phyla
- 594 Mollusca & Molluscoidea
- 595 Other invertebrates
- 596 Vertebrata (Craniata, Vertebrates)
- 597 Cold-blooded vertebrates, fishes
- 598 Aves (Birds)
- 599 Mammalia (Mammals)

600 - Technology

600 Technology (Applied sciences)
- 600 Technology
- 601 Philosophy & theory
- 602 Miscellany
- 603 Dictionaries & encyclopedias
- 604 Special topics
- 605 Serial publications
- 606 Organizations
- 607 Education, research, related topics
- 608 Invention & patents
- 609 Historical, geographic, 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 and therapeutics
- 616 Diseases
- 617 Surgery & related medical specialties
- 618 Gynaecology & other medical specialties
- 619 Experimental medicine
620 Engineering & Applied operations
- 621 Applied physics
- 622 Mining & related operations
- 623 Military & nautical engineering
- 624 Civil engineering
- 625 Engineering of railroads, roads
- 626 Not assigned or no longer used
- 627 Hydraulic engineering
- 628 Sanitary & municipal engineering
- 629 Other branches of engineering
630 Agriculture
- 631 Techniques, equipment, materials
- 632 Plant injuries, diseases, pests
- 633 Field & plantation crops
- 634 Orchards, fruits, forestry
- 635 Garden crops (Horticulture)
- 636 Animal husbandry
- 637 Processing dairy & related products
- 638 Insect culture
- 639 Hunting, fishing, conservation
640 Home economics & family living
- 641 Food & drink
- 642 Meals & table service
- 643 Housing & household equipment
- 644 Household utilities
- 645 Household furnishings
- 646 Sewing, clothing, personal living
- 647 Management of public households
- 648 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 oils, fats, waxes, gases
- 666 Ceramic & allied technologies
- 667 Cleaning, color, related technologies
- 668 Technology of other organic products
- 669 Metallurgy
670 Manufacturing
- 671 Metalworking & metal products
- 672 Iron, steel, other iron alloys
- 673 Nonferrous metals
- 674 Lumber processing, wood products, cork
- 675 Leather & fur processing
- 676 Pulp & paper technology
- 677 Textiles
- 678 Elastomers & elastomer products
- 679 Other products of specific materials
680 Manufacture for specific uses
- 681 Precision instruments & other devices
- 682 Small forge work (Blacksmithing)
- 683 Hardware & household appliances
- 684 Furnishings & home workshops
- 685 Leather, fur, related products
- 686 Printing & related activities
- 687 Clothing
- 688 Other final products & packaging
- 689 Not assigned or no longer used
690 Buildings
- 691 Building materials
- 692 Auxiliary construction practices
- 693 Specific materials & purposes
- 694 Wood construction; Carpentry
- 695 Roof covering
- 696 Utilities
- 697 Heating, ventilating, air-conditioning
- 698 Detail finishing
- 699 Not assigned or no longer used

700 - Arts

700 Arts
- 700 The Arts; fine & decorative arts
- 701 Philosophy & theory
- 702 Miscellany
- 703 Dictionaries & encyclopedias
- 704 Special topics
- 705 Serial publications
- 706 Organizations & management
- 707 Education, research, related topics
- 708 Galleries, museums, private collections
- 709 Historical, areas, persons treatment
710 Civic & landscape art
- 711 Area planning (Civic art)
- 712 Landscape architecture
- 713 Landscape architecture of trafficways
- 714 Water features
- 715 Woody plants
- 716 Herbaceous plants
- 717 Structures
- 718 Landscape design of cemeteries
- 719 Natural landscapes
720 Architecture
- 721 Architectural structure
- 722 Architecture to ca. 300
- 723 Architecture from ca. 300 to 1399
- 724 Architecture from 1400
- 725 Public structures
- 726 Buildings for religious purposes
- 727 Buildings for education & research
- 728 Residential & related buildings
- 729 Design & decoration
730 Plastic arts; Sculpture
- 731 Processes, forms, subjects of sculpture
- 732 Sculpture to ca. 500
- 733 Greek, Etruscan, Roman sculpture
- 734 Sculpture from ca. 500 to 1399
- 735 Sculpture from 1400
- 736 Carving & carvings
- 737 Numismatics & sigillography
- 738 Ceramic arts
- 739 Art metalwork
740 Drawing & decorative arts
- 741 Drawing & drawings
- 742 Perspective (graphical)
- 743 Drawing & drawings by subject
- 744 Not assigned or no longer used
- 745 Decorative arts
- 746 Textile arts
- 747 Interior decoration
- 748 Glass
- 749 Furniture & accessories
750 Painting & paintings
- 751 Techniques, equipment, forms
- 752 Color
- 753 Symbolism, allegory, mythology, legend
- 754 Genre paintings
- 755 Religion & religious symbolism
- 756 Not assigned or no longer used
- 757 Human figures & their parts
- 758 Other subjects
- 759 Geographical, historical, areas, persons treatment
760 Graphic arts; Printmaking & prints
- 761 Relief processes (Block printing)
- 762 Not assigned or no longer used
- 763 Lithographic (Planographic) processes
- 764 Chromolithography & serigraphy
- 765 Metal engraving
- 766 Mezzotinting & related processes
- 767 Etching & drypoint
- 768 Not assigned or no longer used
- 769 Prints
770 Photography & photographs
- 771 Techniques, 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 Fields & kinds of photography
- 779 Photographs
780 Music
- 781 General principles & musical forms
- 782 Vocal music
- 783 Music for single voices; The voice
- 784 Instruments & Instrumental ensembles
- 785 Chamber music
- 786 Keyboard & other instruments
- 787 Stringed instruments (Chordophones)
- 788 Wind instruments (Aerophones)
- 789 Not assigned or no longer used
790 Recreational & performing arts
- 791 Public performances
- 792 Stage presentations
- 793 Indoor games & amusements
- 794 Indoor games of skill
- 795 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 & criticism
- 800 Literature & rhetoric
- 801 Philosophy & theory
- 802 Miscellany
- 803 Dictionaries & encyclopedias
- 804 Not assigned or no longer used
- 805 Serial publications
- 806 Organizations
- 807 Education, research, related topics
- 808 Rhetoric & collections of literature
- 809 Literary history & criticism
810 American literature in English
- 811 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 & Old English literatures
- 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 Provençal & Catalan
850 Italian, Romanian, 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 & Portuguese literatures
- 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
- 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 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, geography,(& biography)

900 history
- 900 History & geography
- 901 Philosophy & theory
- 902 unassigned
- 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 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
- 921-928 This range is reserved as an optional location for biographies, which are shelved alphabetically by subject's last name.
- 929 Genealogy, names, insignia
930 History of ancient world
- 931 History of ancient world; China
- 932 History of ancient world; Egypt
- 933 History of ancient world; Palestine
- 934 History of ancient world; India
- 935 History of ancient world; Mesopotamia & Iranian Plateau
- 936 History of ancient world; Europe north & west of Italy
- 937 History of ancient world; Italy & adjacent territories
- 938 History of ancient world; Greece
- 939 History of ancient world; Other parts of ancient world
940 General history of Europe
- 941 General history of Europe; British Isles
- 942 General history of Europe; England & Wales
- 943 General history of Europe; Central Europe; Germany
- 944 General history of Europe; France & Monaco
- 945 General history of Europe; Italian Peninsula & adjacent islands
- 946 General history of Europe; Iberian Peninsula & adjacent islands
- 947 General history of Europe; Eastern Europe; Russia
- 948 General history of Europe; Northern Europe; Scandinavia
- 949 General history of Europe; Other parts of Europe
950 General history of Asia; Far East
- 951 General history of Asia; China & adjacent areas
- 952 General history of Asia; Japan
- 953 General history of Asia; Arabian Peninsula & adjacent areas
- 954 General history of Asia; South Asia; India
- 955 General history of Asia; Iran
- 956 General history of Asia; Middle East (Near East)
- 957 General history of Asia; Siberia (Asiatic Russia)
- 958 General history of Asia; Central Asia
- 959 General history of Asia; Southeast Asia
960 General history of Africa
- 961 General history of Africa; Tunisia & Libya
- 962 General history of Africa; Egypt & Sudan
- 963 General history of Africa; Ethiopia
- 964 General history of Africa; Morocco & Canary Islands
- 965 General history of Africa; Algeria
- 966 General history of 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; Canada
- 972 General history of North America; Middle America; Mexico
- 973 General history of North America; United States
- 974 General history of North America; 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; Brazil
- 982 General history of South America; Argentina
- 983 General history of South America; Chile
- 984 General history of South America; Bolivia
- 985 General history of South America; Peru
- 986 General history of South America; Colombia & Ecuador
- 987 General history of South America; Venezuela
- 988 General history of South America; Guiana
- 989 General history of South America; Paraguay & 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; New Zealand
- 994 General history of other areas; Australia
- 995 General history of other areas; Melanesia; 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 & Antarctica
- 999 Extraterrestrial worlds

That is the Dewey decimal system

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