Below is the Library of Congress (LS) Classification outline (adapted from the Library of Congress webpages, with links to further divisions)

• A -- GENERAL WORKS
• B -- PHILOSOPHY. PSYCHOLOGY. RELIGION
• C -- AUXILIARY SCIENCES OF HISTORY
• D -- WORLD HISTORY AND HISTORY OF EUROPE, ASIA, AFRICA, AUSTRALIA, NEW ZEALAND, ETC.
• E -- HISTORY OF THE AMERICAS
• F -- HISTORY OF THE AMERICAS
• G -- GEOGRAPHY. ANTHROPOLOGY. RECREATION
• H -- SOCIAL SCIENCES
• J -- POLITICAL SCIENCE
• K -- LAW
• L -- EDUCATION
• M -- MUSIC AND BOOKS ON MUSIC
• N -- FINE ARTS
• P -- LANGUAGE AND LITERATURE
• Q -- SCIENCE
• R -- MEDICINE
• S -- AGRICULTURE
• T -- TECHNOLOGY
• U -- MILITARY SCIENCE
• V -- NAVAL SCIENCE
• Z -- BIBLIOGRAPHY. LIBRARY SCIENCE. INFORMATION RESOURCES (GENERAL)

Below is a summary of the DDC to the 0's.  For a further breakdown of the classification number and more about DDC see the OCLC Dewey Decimal Classification Summaries.

000 Computer science, knowledge & systems 010 Bibliographies 020 Library & information sciences 030 Encyclopedias & books of facts 040 [Unassigned] 050 Magazines, journals & serials 060 Associations, organizations & museums 070 News media, journalism & publishing 080 Quotations 090 Manuscripts & rare books 100 Philosophy 110 Metaphysics 120 Epistemology 130 Parapsychology & occultism 140 Philosophical schools of thought 150 Psychology 160 Logic 170 Ethics 180 Ancient, medieval & eastern philosophy 190 Modern western philosophy 200 Religion 210 Philosophy & theory of religion 220 The Bible 230 Christianity & Christian theology 240 Christian practice & observance 250 Christian pastoral practice & religious orders 260 Christian organization, social work & worship 270 History of Christianity 280 Christian denominations 290 Other religions 300 Social sciences, sociology & anthropology 310 Statistics 320 Political science 330 Economics 340 Law 350 Public administration & military science 360 Social problems & social services 370 Education 380 Commerce, communications & transportation 390 Customs, etiquette & folklore 400 Language 410 Linguistics 420 English & Old English languages 430 German & related languages 440 French & related languages 450 Italian, Romanian & related languages 460 Spanish & Portuguese languages 470 Latin & Italic languages 480 Classical & modern Greek languages 490 Other languages

500 Science 510 Mathematics 520 Astronomy 530 Physics 540 Chemistry 550 Earth sciences & geology 560 Fossils & prehistoric life 570 Life sciences; biology 580 Plants (Botany) 590 Animals (Zoology) 600 Technology 610 Medicine & health 620 Engineering 630 Agriculture 640 Home & family management 650 Management & public relations 660 Chemical engineering 670 Manufacturing 680 Manufacture for specific uses 690 Building & construction 700 Arts 710 Landscaping & area planning 720 Architecture 730 Sculpture, ceramics & metalwork 740 Drawing & decorative arts 750 Painting 760 Graphic arts 770 Photography & computer art 780 Music 790 Sports, games & entertainment 800 Literature, rhetoric & criticism 810 American literature in English 820 English & Old English literatures 830 German & related literatures 840 French & related literatures 850 Italian, Romanian & related literatures 860 Spanish & Portuguese literatures 870 Latin & Italic literatures 880 Classical & modern Greek literatures 890 Other literatures 900 History 910 Geography & travel 920 Biography & genealogy 930 History of ancient world (to ca. 499) 940 History of Europe 950 History of Asia 960 History of Africa 970 History of North America 980 History of South America 990 History of other areas

For ore information about MARC Records see the Guide from the Library of Congress.

For a further breakdown of the fields, click on the individual fields.

DIRECTORY

VARIABLE CONTROL FIELDS

VARIABLE DATA FIELDS