This is a comparison chart showing how the Dewey Decimal and Library of Congress Classification systems organize resources by concept, in part for the purpose of assigning call numbers. These two systems account for over 95% of the classification in United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 libraries, and are used widely worldwide.

The chart includes all ninety-nine second level (two-digit) DDC classes (040 is not assigned), and should include all second level (two-digit) LCC classes. Where a class in one system maps to several classes in other system, it will be listed multiple times (e.g. DDC class 551).

Additional information on these classification plans is available at:

• Dewey Decimal Classification
  Dewey Decimal Classification
  Dewey Decimal Classification, is a proprietary system of library classification developed by Melvil Dewey in 1876.It has been greatly modified and expanded through 23 major revisions, the most recent in 2011...
  
   -- high level categories, with links to lower level categories
• Library of Congress Classification
  Library of Congress Classification
  The Library of Congress Classification is a system of library classification developed by the Library of Congress. It is used by most research and academic libraries in the U.S. and several other countries; for example, Australia and Taiwan, R.O.C. It is not to be confused with the Library of...
  
   -- high level categories

Chart

DDC Dewey Decimal Classification Dewey Decimal Classification, is a proprietary system of library classification developed by Melvil Dewey in 1876.It has been greatly modified and expanded through 23 major revisions, the most recent in 2011...	LCC Library of Congress Classification The Library of Congress Classification is a system of library classification developed by the Library of Congress. It is used by most research and academic libraries in the U.S. and several other countries; for example, Australia and Taiwan, R.O.C. It is not to be confused with the Library of...	Description
000		Computer science, knowledge and general works
001	A	Knowledge
002		The book
003		Systems
004	QA(subrange)	Data processing & computer science
005	QA(subrange)	Computer programming, programs & data
006	QA(subrange)	Special computer methods
010	Z1001-8999	Bibliography
020	Z665-718.8	Library & information sciences
030	AE	General encyclopedic works
050	AI	General serials & their indexes
060	AM111-160	General organization & museology
070	AN	News media
070	PN4699-5650	Journalism
070	Z278-549	Publishing
080	AC	General collections
090	Z105-115.5	Manuscripts
090	Z1019-1033	Rare books
100	B	Psychology Psychology Psychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...  & Philosophy Philosophy Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...
111	BD300-450	Ontology Ontology Ontology is the philosophical study of the nature of being, existence or reality as such, as well as the basic categories of being and their relations...
115	BD493-701	Time Time Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....
120	BD143-237	Epistemology
120	BD?	Causation Causality Causality is the relationship between an event and a second event , where the second event is understood as a consequence of the first....
120	BD?	Humankind
124	BD493-701	Teleology Teleology A teleology is any philosophical account which holds that final causes exist in nature, meaning that design and purpose analogous to that found in human actions are inherent also in the rest of nature. The word comes from the Greek τέλος, telos; root: τελε-, "end, purpose...
130	BF1404-2055	Paranormal phenomena / Occult sciences
150	BF	Psychology Psychology Psychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...
152	HM1041-1101	Perception Perception Perception is the process of attaining awareness or understanding of the environment by organizing and interpreting sensory information. All perception involves signals in the nervous system, which in turn result from physical stimulation of the sense organs...
152	QH?	Movement Motion (physics) In physics, motion is a change in position of an object with respect to time. Change in action is the result of an unbalanced force. Motion is typically described in terms of velocity, acceleration, displacement and time . An object's velocity cannot change unless it is acted upon by a force, as...
152	BF511-593	Emotions
155	BF712-724	Developmental psychology Developmental psychology Developmental psychology, also known as human development, is the scientific study of systematic psychological changes, emotional changes, and perception changes that occur in human beings over the course of their life span. Originally concerned with infants and children, the field has expanded to...
160	BC	Logic
170	BJ	Ethics Ethics Ethics, also known as moral philosophy, is a branch of philosophy that addresses questions about morality—that is, concepts such as good and evil, right and wrong, virtue and vice, justice and crime, etc.Major branches of ethics include:...  (moral philosophy)
180	B108-708	Classic philosophy Philosophy Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...
181	B850-5739	Oriental philosophy
182	B108-708	Ancient philosophy Ancient philosophy This page lists some links to ancient philosophy. In Western philosophy, the spread of Christianity through the Roman Empire marked the ending of Hellenistic philosophy and ushered in the beginnings of Medieval philosophy, whereas in Eastern philosophy, the spread of Islam through the Arab Empire...
183	B108-708	Sophists & Socratic Socratic method The Socratic method , named after the classical Greek philosopher Socrates, is a form of inquiry and debate between individuals with opposing viewpoints based on asking and answering questions to stimulate critical thinking and to illuminate ideas...  philosophies
185	B108-708	Aristotelian philosophy
186	B108-708	Skeptic & Neoplatonic philosophies
187	B108-708	Epicurean philosophy
188	B108-708	Stoic philosophy
189	B720-765	Medieval Western philosophy Medieval philosophy Medieval philosophy is the philosophy in the era now known as medieval or the Middle Ages, the period roughly extending from the fall of the Western Roman Empire in the fifth century AD to the Renaissance in the sixteenth century...
190	B790-5802	Modern Western philosophy Western philosophy Western philosophy is the philosophical thought and work of the Western or Occidental world, as distinct from Eastern or Oriental philosophies and the varieties of indigenous philosophies....
200	BL	Religion Religion Religion is a collection of cultural systems, belief systems, and worldviews that establishes symbols that relate humanity to spirituality and, sometimes, to moral values. Many religions have narratives, symbols, traditions and sacred histories that are intended to give meaning to life or to...
210	BL175-265	Natural theology
212	BL205-216	Nature of God
220	BS	Bible Bible The Bible refers to any one of the collections of the primary religious texts of Judaism and Christianity. There is no common version of the Bible, as the individual books , their contents and their order vary among denominations...
221	BS701-1830	Old Testament Old Testament The Old Testament, of which Christians hold different views, is a Christian term for the religious writings of ancient Israel held sacred and inspired by Christians which overlaps with the 24-book canon of the Masoretic Text of Judaism...
225	BS1901-2970	New Testament New Testament The New Testament is the second major division of the Christian biblical canon, the first such division being the much longer Old Testament....
226	BS2547-2970?	Gospels & Acts of the Apostles Acts of the Apostles The Acts of the Apostles , usually referred to simply as Acts, is the fifth book of the New Testament; Acts outlines the history of the Apostolic Age...
227	BS2640-2765.6	Epistles
228	BS2547-2970?	Revelation Revelation In religion and theology, revelation is the revealing or disclosing, through active or passive communication with a supernatural or a divine entity...
229	BS2547-2970?	Apocrypha Apocrypha The term apocrypha is used with various meanings, including "hidden", "esoteric", "spurious", "of questionable authenticity", ancient Chinese "revealed texts and objects" and "Christian texts that are not canonical"....
230	BR	Christian theology Christian theology - Divisions of Christian theology :There are many methods of categorizing different approaches to Christian theology. For a historical analysis, see the main article on the History of Christian theology.- Sub-disciplines :...
232	BT198-590	Jesus Jesus Jesus of Nazareth , commonly referred to as Jesus Christ or simply as Jesus or Christ, is the central figure of Christianity...  & his family
236	BT819-891	Eschatology Eschatology Eschatology is a part of theology, philosophy, and futurology concerned with what are believed to be the final events in history, or the ultimate destiny of humanity, commonly referred to as the end of the world or the World to Come...
250	BR?	Christian orders & local church
260	BR?	Christian social theology
270	BR140-1510	Christian church history
280	BX?	List of Christian denominations
282	BX800-4795	Roman Catholic Church Roman Catholic Church The Catholic Church, also known as the Roman Catholic Church, is the world's largest Christian church, with over a billion members. Led by the Pope, it defines its mission as spreading the gospel of Jesus Christ, administering the sacraments and exercising charity...
283	BX5001-6093	Anglican churches (English and Protestant Episcopal Anglican Communion The Anglican Communion is an international association of national and regional Anglican churches in full communion with the Church of England and specifically with its principal primate, the Archbishop of Canterbury... )
284	BX?	Protestants of Continental origin
286	BX6201-6495, BX7301-7343, BX6101-6193	Baptist Baptist Baptists comprise a group of Christian denominations and churches that subscribe to a doctrine that baptism should be performed only for professing believers , and that it must be done by immersion... , Disciples of Christ, Adventist Adventist Adventism is a Christian movement which began in the 19th century, in the context of the Second Great Awakening revival in the United States. The name refers to belief in the imminent Second Coming of Jesus Christ. It was started by William Miller, whose followers became known as Millerites...
287	BX8201-8495	Methodist & related churches
289	BX7601-7795, BX7801-7843, BX8101-8144, BX 8799-8809, BX9751-9793, BX9998	Other denominations and sects
290	BL660-2680	Non-Christian religion
292	BL700-820	Greek mythology Greek mythology Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...  and Roman mythology Roman mythology Roman mythology is the body of traditional stories pertaining to ancient Rome's legendary origins and religious system, as represented in the literature and visual arts of the Romans...
295	BL1500-1590	Zoroastrianism Zoroastrianism Zoroastrianism is a religion and philosophy based on the teachings of prophet Zoroaster and was formerly among the world's largest religions. It was probably founded some time before the 6th century BCE in Greater Iran.In Zoroastrianism, the Creator Ahura Mazda is all good, and no evil...
296	BM	Judaism Judaism Judaism ) is the "religion, philosophy, and way of life" of the Jewish people...
297	BP	Islam Islam Islam . The most common are and .   : Arabic pronunciation varies regionally. The first vowel ranges from ~~. The second vowel ranges from ~~~... , Bábísm, Bahá'í Faith Bahá'í Faith The Bahá'í Faith is a monotheistic religion founded by Bahá'u'lláh in 19th-century Persia, emphasizing the spiritual unity of all humankind. There are an estimated five to six million Bahá'ís around the world in more than 200 countries and territories....
300	H	Social sciences Social sciences Social science is the field of study concerned with society. "Social science" is commonly used as an umbrella term to refer to a plurality of fields outside of the natural sciences usually exclusive of the administrative or managerial sciences...
301	HM	Sociology Sociology Sociology is the study of society. It is a social science—a term with which it is sometimes synonymous—which uses various methods of empirical investigation and critical analysis to develop a body of knowledge about human social activity...
301	GN	Anthropology Anthropology Anthropology is the study of humanity. It has origins in the humanities, the natural sciences, and the social sciences. The term "anthropology" is from the Greek anthrōpos , "man", understood to mean mankind or humanity, and -logia , "discourse" or "study", and was first used in 1501 by German...
310	HA154-473	General statistics (of parts of the world)
320	J	Political science Political science Political Science is a social science discipline concerned with the study of the state, government and politics. Aristotle defined it as the study of the state. It deals extensively with the theory and practice of politics, and the analysis of political systems and political behavior...
327	JZ	International relations
330	HB	Economics Economics Economics is the social science that analyzes the production, distribution, and consumption of goods and services. The term economics comes from the Ancient Greek from + , hence "rules of the house"...
331	HD4801-8943	Labor economics
332	HG	Financial economics Financial economics Financial Economics is the branch of economics concerned with "the allocation and deployment of economic resources, both spatially and across time, in an uncertain environment"....
333	HD101-1399	Economics of land
333	HD9502	Economics of energy
336	HJ	Public finance Public finance Public finance is the revenue and expenditure of public authoritiesThe purview of public finance is considered to be threefold: governmental effects on efficient allocation of resources, distribution of income, and macroeconomic stabilization.-Overview:The proper role of government provides a...
339	HB?	Macroeconomics Macroeconomics Macroeconomics is a branch of economics dealing with the performance, structure, behavior, and decision-making of the whole economy. This includes a national, regional, or global economy...
340	K Library of Congress Classification:Class K -- Law Class K: Law is a classification used by the Library of Congress Classification system. This page outlines the sub-classes of Class K.-K - Law in general. Comparative and uniform law. Jurisprudence:...	Law Law Law is a system of rules and guidelines which are enforced through social institutions to govern behavior, wherever possible. It shapes politics, economics and society in numerous ways and serves as a social mediator of relations between people. Contract law regulates everything from buying a bus...
341	KZ Library of Congress Classification:Class K -- Law Class K: Law is a classification used by the Library of Congress Classification system. This page outlines the sub-classes of Class K.-K - Law in general. Comparative and uniform law. Jurisprudence:...	International law International law Public international law concerns the structure and conduct of sovereign states; analogous entities, such as the Holy See; and intergovernmental organizations. To a lesser degree, international law also may affect multinational corporations and individuals, an impact increasingly evolving beyond...
345	K5000-5582 Library of Congress Classification:Class K -- Law Class K: Law is a classification used by the Library of Congress Classification system. This page outlines the sub-classes of Class K.-K - Law in general. Comparative and uniform law. Jurisprudence:...	Criminal law Criminal law Criminal law, is the body of law that relates to crime. It might be defined as the body of rules that defines conduct that is not allowed because it is held to threaten, harm or endanger the safety and welfare of people, and that sets out the punishment to be imposed on people who do not obey...
346	KB479 Library of Congress Classification:Class K -- Law Class K: Law is a classification used by the Library of Congress Classification system. This page outlines the sub-classes of Class K.-K - Law in general. Comparative and uniform law. Jurisprudence:...	Private law Private law Private law is that part of a civil law legal system which is part of the jus commune that involves relationships between individuals, such as the law of contracts or torts, as it is called in the common law, and the law of obligations as it is called in civilian legal systems...
347	K2201-2385 Library of Congress Classification:Class K -- Law Class K: Law is a classification used by the Library of Congress Classification system. This page outlines the sub-classes of Class K.-K - Law in general. Comparative and uniform law. Jurisprudence:...	Civil procedure Civil procedure Civil procedure is the body of law that sets out the rules and standards that courts follow when adjudicating civil lawsuits...
347	K2100-2385	Courts
350	JF	Public administration Public administration Public Administration houses the implementation of government policy and an academic discipline that studies this implementation and that prepares civil servants for this work. As a "field of inquiry with a diverse scope" its "fundamental goal.....
352	JS	City government
353	JK1-9593	U.S. federal government
353	JK2403-9593	U.S. state governments
355	U	Military Science Military science Military science is the process of translating national defence policy to produce military capability by employing military scientists, including theorists, researchers, experimental scientists, applied scientists, designers, engineers, test technicians, and military personnel responsible for...
360	H	Social services; association
361	HN	General social problems & services
362	HN	Social welfare problems & services
363	HN	Other social problems & services
364	HV6001-7220	Criminology
365	HV8301-9920	Penal & related institutions
366	HS	Association
367	HS	General clubs
368	K1960-1973	(Social) Insurance
370	L	Education Education Education in its broadest, general sense is the means through which the aims and habits of a group of people lives on from one generation to the next. Generally, it occurs through any experience that has a formative effect on the way one thinks, feels, or acts...
371	LB3011-3095	School management
371	LC3950-4806.5	Special education
372	LB1501-1602	Elementary education
373	LB1603-1699	Secondary education
374	LC5201-6661	Adult education
376	LC1401-2572	Education of women
377	LC321-951	Schools & religion
378	LB2300-2430	Higher education
380	HF	Commerce Commerce While business refers to the value-creating activities of an organization for profit, commerce means the whole system of an economy that constitutes an environment for business. The system includes legal, economic, political, social, cultural, and technological systems that are in operation in any... , communications Transport Transport or transportation is the movement of people, cattle, animals and goods from one location to another. Modes of transport include air, rail, road, water, cable, pipeline, and space. The field can be divided into infrastructure, vehicles, and operations... , transport Transport Transport or transportation is the movement of people, cattle, animals and goods from one location to another. Modes of transport include air, rail, road, water, cable, pipeline, and space. The field can be divided into infrastructure, vehicles, and operations...
382	HF1	International commerce (Foreign trade)
383	HE6000-7500	Postal Mail Mail, or post, is a system for transporting letters and other tangible objects: written documents, typically enclosed in envelopes, and also small packages are delivered to destinations around the world. Anything sent through the postal system is called mail or post.In principle, a postal service...  communications
384	HE	Communication Communication Communication is the activity of conveying meaningful information. Communication requires a sender, a message, and an intended recipient, although the receiver need not be present or aware of the sender's intent to communicate at the time of communication; thus communication can occur across vast... s
384	HE7601-8700.9	Telecommunication Telecommunication Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
385	HE1001-5600	Railways
386	HE380-560	Inland waterway Canal Canals are man-made channels for water. There are two types of canal:#Waterways: navigable transportation canals used for carrying ships and boats shipping goods and conveying people, further subdivided into two kinds:...
386	HE5751-5870	Ferry Ferry A ferry is a form of transportation, usually a boat, but sometimes a ship, used to carry primarily passengers, and sometimes vehicles and cargo as well, across a body of water. Most ferries operate on regular, frequent, return services...  transport Transport Transport or transportation is the movement of people, cattle, animals and goods from one location to another. Modes of transport include air, rail, road, water, cable, pipeline, and space. The field can be divided into infrastructure, vehicles, and operations... ation
387	HE380-971	Water transportation
387	HE9761-9900	Air transportation
387	TL787-4050	Space transportation
388	HE	Transport Transport Transport or transportation is the movement of people, cattle, animals and goods from one location to another. Modes of transport include air, rail, road, water, cable, pipeline, and space. The field can be divided into infrastructure, vehicles, and operations...
390	GT	Customs
390	BJ1801-2195	Etiquette
390	GR	Folklore
391	GT500-2370	Costume Costume The term costume can refer to wardrobe and dress in general, or to the distinctive style of dress of a particular people, class, or period. Costume may also refer to the artistic arrangement of accessories in a picture, statue, poem, or play, appropriate to the time, place, or other circumstances...  and Personal Appearance
392	GT2400-3390.5	Customs Customs Customs is an authority or agency in a country responsible for collecting and safeguarding customs duties and for controlling the flow of goods including animals, transports, personal effects and hazardous items in and out of a country...  of life cycle Rite of passage A rite of passage is a ritual event that marks a person's progress from one status to another. It is a universal phenomenon which can show anthropologists what social hierarchies, values and beliefs are important in specific cultures....  & domestic life Domestic Life "Domestic Life" is a single by American country music artist John Conlee. Released in 1987, it was the first single from the album American Faces. The song reached #4 on the Billboard Hot Country Singles & Tracks chart.-Chart perofrmance:...
393	GT2400-3390.5	Customs of Death Death Death is the permanent termination of the biological functions that sustain a living organism. Phenomena which commonly bring about death include old age, predation, malnutrition, disease, and accidents or trauma resulting in terminal injury....
395	BJ1801-2195	Etiquette Etiquette Etiquette is a code of behavior that delineates expectations for social behavior according to contemporary conventional norms within a society, social class, or group...
398	GR	Folklore Folklore Folklore consists of legends, music, oral history, proverbs, jokes, popular beliefs, fairy tales and customs that are the traditions of a culture, subculture, or group. It is also the set of practices through which those expressive genres are shared. The study of folklore is sometimes called...
400	P	Language Language Language may refer either to the specifically human capacity for acquiring and using complex systems of communication, or to a specific instance of such a system of complex communication...
410	P101-410	Linguistics Linguistics Linguistics is the scientific study of human language. Linguistics can be broadly broken into three categories or subfields of study: language form, language meaning, and language in context....
411	P327-327.5	Writing systems
412	P321-324.5	Etymology Etymology Etymology is the study of the history of words, their origins, and how their form and meaning have changed over time.For languages with a long written history, etymologists make use of texts in these languages and texts about the languages to gather knowledge about how words were used during...
414	P?	Phonology Phonology Phonology is, broadly speaking, the subdiscipline of linguistics concerned with the sounds of language. That is, it is the systematic use of sound to encode meaning in any spoken human language, or the field of linguistics studying this use...  phonetics Phonetics Phonetics is a branch of linguistics that comprises the study of the sounds of human speech, or—in the case of sign languages—the equivalent aspects of sign. It is concerned with the physical properties of speech sounds or signs : their physiological production, acoustic properties, auditory...
415	P201-299	Grammar Grammar In linguistics, grammar is the set of structural rules that govern the composition of clauses, phrases, and words in any given natural language. The term refers also to the study of such rules, and this field includes morphology, syntax, and phonology, often complemented by phonetics, semantics,...
419	PM8001-8995	Sign language Sign language A sign language is a language which, instead of acoustically conveyed sound patterns, uses visually transmitted sign patterns to convey meaning—simultaneously combining hand shapes, orientation and movement of the hands, arms or body, and facial expressions to fluidly express a speaker's...
420	PE	English language English language English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...
430	PD	Germanic languages
440	PC2001-3761	French language French language French is a Romance language spoken as a first language in France, the Romandy region in Switzerland, Wallonia and Brussels in Belgium, Monaco, the regions of Quebec and Acadia in Canada, and by various communities elsewhere. Second-language speakers of French are distributed throughout many parts...
449	PC3201-3366	Provençal Provençal language Provençal is a dialect of Occitan spoken by a minority of people in southern France, mostly in Provence. In the English-speaking world, "Provençal" is often used to refer to all dialects of Occitan, but it actually refers specifically to the dialect spoken in Provence."Provençal" is also the...
449	PC3801-3976	Catalan Catalan language Catalan is a Romance language, the national and only official language of Andorra and a co-official language in the Spanish autonomous communities of Catalonia, the Balearic Islands and Valencian Community, where it is known as Valencian , as well as in the city of Alghero, on the Italian island...
450	PC1001-1977	Italian language Italian language Italian is a Romance language spoken mainly in Europe: Italy, Switzerland, San Marino, Vatican City, by minorities in Malta, Monaco, Croatia, Slovenia, France, Libya, Eritrea, and Somalia, and by immigrant communities in the Americas and Australia...
459	PC601-872	Romanian language Romanian language Romanian Romanian Romanian (or Daco-Romanian; obsolete spellings Rumanian, Roumanian; self-designation: română, limba română ("the Romanian language") or românește (lit. "in Romanian") is a Romance language spoken by around 24 to 28 million people, primarily in Romania and Moldova...
459	PC901-986	Rhaeto-Romanic language
460	PC4001-4977	Spanish language Spanish language Spanish , also known as Castilian , is a Romance language in the Ibero-Romance group that evolved from several languages and dialects in central-northern Iberia around the 9th century and gradually spread with the expansion of the Kingdom of Castile into central and southern Iberia during the...
469	PC5001-5498	Portuguese language Portuguese language Portuguese is a Romance language that arose in the medieval Kingdom of Galicia, nowadays Galicia and Northern Portugal. The southern part of the Kingdom of Galicia became independent as the County of Portugal in 1095...
470	PA2001-2915	Latin language Latin Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...
480	PA201-899	Greek language Greek language Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...
490	P501-769	Indo-European Languages Indo-European languages The Indo-European languages are a family of several hundred related languages and dialects, including most major current languages of Europe, the Iranian plateau, and South Asia and also historically predominant in Anatolia...
492	PJ991-995	Afro-Asiatic languages Afro-Asiatic languages The Afroasiatic languages , also known as Hamito-Semitic, constitute one of the world's largest language families, with about 375 living languages...
494	PL1-481	Altaic languages Altaic languages Altaic is a proposed language family that includes the Turkic, Mongolic, Tungusic, and Japonic language families and the Korean language isolate. These languages are spoken in a wide arc stretching from northeast Asia through Central Asia to Anatolia and eastern Europe...
495	PL3521-4001	Sino-Tibetan languages Sino-Tibetan languages The Sino-Tibetan languages are a language family comprising, at least, the Chinese and the Tibeto-Burman languages, including some 250 languages of East Asia, Southeast Asia and parts of South Asia. They are second only to the Indo-European languages in terms of the number of native speakers...
496	PL8000-8844	African languages African languages There are over 2100 and by some counts over 3000 languages spoken natively in Africa in several major language families:*Afro-Asiatic spread throughout the Middle East, North Africa, the Horn of Africa, and parts of the Sahel...
497	PM101-2711	North American languages (Native American languages)
498	PM3001-4566	Central American Languages (Native American languages)
498	PM5001-7356	South American Languages (Native American languages)
500	Q	Natural sciences & mathematics Mathematics Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...
510	QA	Mathematics Mathematics Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...
512	QA150-272	Algebra Algebra Algebra is the branch of mathematics concerning the study of the rules of operations and relations, and the constructions and concepts arising from them, including terms, polynomials, equations and algebraic structures...
513	QA101-145	Arithmetic Arithmetic Arithmetic or arithmetics is the oldest and most elementary branch of mathematics, used by almost everyone, for tasks ranging from simple day-to-day counting to advanced science and business calculations. It involves the study of quantity, especially as the result of combining numbers...
514	QA612-699	Topology Topology Topology is a major area of mathematics concerned with properties that are preserved under continuous deformations of objects, such as deformations that involve stretching, but no tearing or gluing...
515	QA299-433	Analysis Mathematical analysis Mathematical analysis, which mathematicians refer to simply as analysis, has its beginnings in the rigorous formulation of infinitesimal calculus. It is a branch of pure mathematics that includes the theories of differentiation, integration and measure, limits, infinite series, and analytic functions...  / Calculus Calculus Calculus is a branch of mathematics focused on limits, functions, derivatives, integrals, and infinite series. This subject constitutes a major part of modern mathematics education. It has two major branches, differential calculus and integral calculus, which are related by the fundamental theorem...
516	QA440-611	Geometry Geometry Geometry arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre-modern mathematics, the other being the study of numbers ....  (excluding Topology)
519	QA273-299	Probability Probability Probability is ordinarily used to describe an attitude of mind towards some proposition of whose truth we arenot certain. The proposition of interest is usually of the form "Will a specific event occur?" The attitude of mind is of the form "How certain are we that the event will occur?" The... , Statistics Statistics Statistics is the study of the collection, organization, analysis, and interpretation of data. It deals with all aspects of this, including the planning of data collection in terms of the design of surveys and experiments.... , Numerical analysis Numerical analysis Numerical analysis is the study of algorithms that use numerical approximation for the problems of mathematical analysis ....
520	QB	Astronomy Astronomy Astronomy is a natural science that deals with the study of celestial objects and phenomena that originate outside the atmosphere of Earth...
521	QB349-421	Celestial mechanics Celestial mechanics Celestial mechanics is the branch of astronomy that deals with the motions of celestial objects. The field applies principles of physics, historically classical mechanics, to astronomical objects such as stars and planets to produce ephemeris data. Orbital mechanics is a subfield which focuses on...
530	QC	Physics Physics Physics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...
531	QC120-168.85	Classical mechanics; Solid mechanics
532	QC120-168.85	Fluid mechanics; Liquid mechanics
533	QC120-168.85	Gas mechanics
534	QC221-246	Sound & related vibrations
535	QC350-467	Light & paraphotic phenomena
536	QC251-338.5	Heat
537	QC501-721	Electricity & electronics
538	QC750-766	Magnetism Magnetism Magnetism is a property of materials that respond at an atomic or subatomic level to an applied magnetic field. Ferromagnetism is the strongest and most familiar type of magnetism. It is responsible for the behavior of permanent magnets, which produce their own persistent magnetic fields, as well...
539	QC770-798	Modern physics
540	QD	Chemistry Chemistry Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties. Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds....  & allied sciences
541	QD450-801	Physical & theoretical chemistry
542	QD1-65	Techniques, equipment, materials
543	QD71-142	Analytical chemistry
544	QD71-142	Qualitative analysis
545	QD71-142	Quantitative analysis
546	QD146-197	Inorganic chemistry Inorganic chemistry Inorganic chemistry is the branch of chemistry concerned with the properties and behavior of inorganic compounds. This field covers all chemical compounds except the myriad organic compounds , which are the subjects of organic chemistry...
547	QD241-441	Organic chemistry Organic chemistry Organic chemistry is a subdiscipline within chemistry involving the scientific study of the structure, properties, composition, reactions, and preparation of carbon-based compounds, hydrocarbons, and their derivatives...
548	QD0001-0999	Crystallography Crystallography Crystallography is the experimental science of the arrangement of atoms in solids. The word "crystallography" derives from the Greek words crystallon = cold drop / frozen drop, with its meaning extending to all solids with some degree of transparency, and grapho = write.Before the development of...
549	QE351-399.2	Mineralogy Mineralogy Mineralogy is the study of chemistry, crystal structure, and physical properties of minerals. Specific studies within mineralogy include the processes of mineral origin and formation, classification of minerals, their geographical distribution, as well as their utilization.-History:Early writing...
550	QE	Earth sciences
551	QE	Geology Geology Geology is the science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which it evolves. Geology gives insight into the history of the Earth, as it provides the primary evidence for plate tectonics, the evolutionary history of life, and past climates...
551	GB651-2998	Hydrology Hydrology Hydrology is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability...
551	QC851-999	Meteorology Meteorology Meteorology is the interdisciplinary scientific study of the atmosphere. Studies in the field stretch back millennia, though significant progress in meteorology did not occur until the 18th century. The 19th century saw breakthroughs occur after observing networks developed across several countries...
552	QE420-499	Petrology Petrology Petrology is the branch of geology that studies rocks, and the conditions in which rocks form....
553	QE?	Economic geology Economic geology Economic geology is concerned with earth materials that can be used for economic and/or industrial purposes. These materials include precious and base metals, nonmetallic minerals, construction-grade stone, petroleum minerals, coal, and water. The term commonly refers to metallic mineral deposits...
560	QE701-760	Paleontology
560	QE7601-899	Paleozoology
570	QH301-705.5	Life sciences Life sciences The life sciences comprise the fields of science that involve the scientific study of living organisms, like plants, animals, and human beings. While biology remains the centerpiece of the life sciences, technological advances in molecular biology and biotechnology have led to a burgeoning of...  - Biology Biology Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy. Biology is a vast subject containing many subdivisions, topics, and disciplines...
572	QD415-436	Biochemistry Biochemistry Biochemistry, sometimes called biological chemistry, is the study of chemical processes in living organisms, including, but not limited to, living matter. Biochemistry governs all living organisms and living processes...
572	GN	Anthropology Anthropology Anthropology is the study of humanity. It has origins in the humanities, the natural sciences, and the social sciences. The term "anthropology" is from the Greek anthrōpos , "man", understood to mean mankind or humanity, and -logia , "discourse" or "study", and was first used in 1501 by German...
573	GN49-298	Physical anthropology Physical anthropology Biological anthropology is that branch of anthropology that studies the physical development of the human species. It plays an important part in paleoanthropology and in forensic anthropology...
574	QH301-705.5	Biology Biology Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy. Biology is a vast subject containing many subdivisions, topics, and disciplines...
575	QH359-425	Evolution Evolution Evolution is any change across successive generations in the heritable characteristics of biological populations. Evolutionary processes give rise to diversity at every level of biological organisation, including species, individual organisms and molecules such as DNA and proteins.Life on Earth...
575	QH426-470	Genetics Genetics Genetics , a discipline of biology, is the science of genes, heredity, and variation in living organisms....
576	QH573-671	Microbiology Microbiology Microbiology is the study of microorganisms, which are defined as any microscopic organism that comprises either a single cell , cell clusters or no cell at all . This includes eukaryotes, such as fungi and protists, and prokaryotes...
577	QH540-549.5	Ecology Ecology Ecology is the scientific study of the relations that living organisms have with respect to each other and their natural environment. Variables of interest to ecologists include the composition, distribution, amount , number, and changing states of organisms within and among ecosystems...
578	QH201-278.5	Microscopy in biology
579	QH1-199.5	Collection and preservation
580	QK	Botanical sciences
581	QK	Botany
582	QK474.8-495	Spermatophyta (Seed-bearing plants)
585	K494-494.5	Gymnospermae (Pinophyta)
586	QK504-638	Cryptogamia (Seedless plants)
590	QL	Animal Animal Animals are a major group of multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and... s
591	QL1-355	Zoology Zoology Zoology |zoölogy]]), is the branch of biology that relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct...
592	QL360-599.82	Invertebrate Invertebrate An invertebrate is an animal without a backbone. The group includes 97% of all animal species – all animals except those in the chordate subphylum Vertebrata .Invertebrates form a paraphyletic group... s
593	QL360-599.82	Protozoa Protozoa Protozoa are a diverse group of single-cells eukaryotic organisms, many of which are motile. Throughout history, protozoa have been defined as single-cell protists with animal-like behavior, e.g., movement... , Echinodermata, related phyla
594	QL360-599.82	Mollusca Mollusca The Mollusca , common name molluscs or mollusksSpelled mollusks in the USA, see reasons given in Rosenberg's ; for the spelling mollusc see the reasons given by , is a large phylum of invertebrate animals. There are around 85,000 recognized extant species of molluscs. Mollusca is the largest...  & Molluscoidea
595	QL360-599.82	Other invertebrates
596	QL605-739.8	Vertebrata (Craniata Craniata Craniata is a proposed clade of chordate animals that contains the Myxini , Petromyzontida , and Gnathostomata as living representatives... , Vertebrates)
597	QL614-639.8	Fish Fish Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups... es
597	QL640-669.3	Reptile Reptile Reptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors... s and amphibian Amphibian Amphibians , are a class of vertebrate animals including animals such as toads, frogs, caecilians, and salamanders. They are characterized as non-amniote ectothermic tetrapods... s
598	QL671-699	Aves (Birds)
599	QL700-739.8	Mammalia (Mammals)
600	T	Technology Technology Technology is the making, usage, and knowledge of tools, machines, techniques, crafts, systems or methods of organization in order to solve a problem or perform a specific function. It can also refer to the collection of such tools, machinery, and procedures. The word technology comes ;...  (Applied sciences)
607	T61-173	Education
607	T175-178	Research
608	T201-342	Invention & patents
608	Q	Invention Invention An invention is a novel composition, device, or process. An invention may be derived from a pre-existing model or idea, or it could be independently conceived, in which case it may be a radical breakthrough. In addition, there is cultural invention, which is an innovative set of useful social...  & patent Patent A patent is a form of intellectual property. It consists of a set of exclusive rights granted by a sovereign state to an inventor or their assignee for a limited period of time in exchange for the public disclosure of an invention.... s
610	R	Medicine Medicine Medicine is the science and art of healing. It encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness....
611	QM	Human anatomy Anatomy Anatomy is a branch of biology and medicine that is the consideration of the structure of living things. It is a general term that includes human anatomy, animal anatomy , and plant anatomy...
611	QH573-671	Cytology Cell biology Cell biology is a scientific discipline that studies cells – their physiological properties, their structure, the organelles they contain, interactions with their environment, their life cycle, division and death. This is done both on a microscopic and molecular level...
611	QM550-577.8	Histology Histology Histology is the study of the microscopic anatomy of cells and tissues of plants and animals. It is performed by examining cells and tissues commonly by sectioning and staining; followed by examination under a light microscope or electron microscope...
612	QP	Human physiology
615	RM	Pharmacology Pharmacology Pharmacology is the branch of medicine and biology concerned with the study of drug action. More specifically, it is the study of the interactions that occur between a living organism and chemicals that affect normal or abnormal biochemical function...  & Therapeutics
617	RD	Surgery Surgery Surgery is an ancient medical specialty that uses operative manual and instrumental techniques on a patient to investigate and/or treat a pathological condition such as disease or injury, or to help improve bodily function or appearance.An act of performing surgery may be called a surgical...  & Related Topics
618	RG	Gynecology
618	R	Other medical specialties
619	R735-854	Experimental medicine
620	TA	Engineering & allied operations
621	TJ	Mechanical engineering Mechanical engineering Mechanical engineering is a discipline of engineering that applies the principles of physics and materials science for analysis, design, manufacturing, and maintenance of mechanical systems. It is the branch of engineering that involves the production and usage of heat and mechanical power for the...
621	QC	Applied physics
622	TN	Mining Mining Mining is the extraction of valuable minerals or other geological materials from the earth, from an ore body, vein or seam. The term also includes the removal of soil. Materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock...  & related operations
623	UG1-620	Military engineering
623	VM	Nautical engineering
624	TA	Civil engineering Civil engineering Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including works like roads, bridges, canals, dams, and buildings...
	TG	Bridge Engineering
625	TF	Engineering of railways
625	TE	Engineering of highways
627	TC1-978	Hydraulic engineering
628	TD	Sanitary & engineering
628	TD159-168	Municipal engineering
629	T	Other branches of engineering
	TK	Electrical Engineering, electronics, nuclear engineering
	TL	Motor vehicles, Aeronautics, Astronautix
	TP	Chemical Technology
630	S	Agriculture Agriculture Agriculture is the cultivation of animals, plants, fungi and other life forms for food, fiber, and other products used to sustain life. Agriculture was the key implement in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that nurtured the...
631	S1-972	Techniques, equipment, materials
632	SB599-990.5	Plant injuries, diseases, pests
633	SB317.5-319.864	Horticulture Horticulture Horticulture is the industry and science of plant cultivation including the process of preparing soil for the planting of seeds, tubers, or cuttings. Horticulturists work and conduct research in the disciplines of plant propagation and cultivation, crop production, plant breeding and genetic...
634	SB354-402	Fruit Fruit In broad terms, a fruit is a structure of a plant that contains its seeds.The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain plants that are sweet and edible in the raw state,... s
634	SD	Forestry Forestry Forestry is the interdisciplinary profession embracing the science, art, and craft of creating, managing, using, and conserving forests and associated resources in a sustainable manner to meet desired goals, needs, and values for human benefit. Forestry is practiced in plantations and natural stands...
634	SB169-172.5	Orchard Orchard An orchard is an intentional planting of trees or shrubs that is maintained for food production. Orchards comprise fruit or nut-producing trees which are grown for commercial production. Orchards are also sometimes a feature of large gardens, where they serve an aesthetic as well as a productive... s
636	SF	Animal husbandry Animal husbandry Animal husbandry is the agricultural practice of breeding and raising livestock.- History :Animal husbandry has been practiced for thousands of years, since the first domestication of animals....
637	SF250.5-275	Processing dairy & related products
638	SF518-561	Insect culture
639	SK	Hunting, fishing
639	S604.5-604.64	Conservation
640	TX	Home economics Home Economics Home economics is the profession and field of study that deals with the economics and management of the home and community...
650	HD28-70	Management Management Management in all business and organizational activities is the act of getting people together to accomplish desired goals and objectives using available resources efficiently and effectively...  & auxiliary services
653	Z53-102	Shorthand
657	HF5601-5689	Accounting
658	HD28-70	General management
659	HF5801-6182	Advertising Advertising Advertising is a form of communication used to persuade an audience to take some action with respect to products, ideas, or services. Most commonly, the desired result is to drive consumer behavior with respect to a commercial offering, although political and ideological advertising is also common...
660	TP155-156	Chemical engineering
670	HD9720-9975	Manufacturing Manufacturing Manufacturing is the use of machines, tools and labor to produce goods for use or sale. The term may refer to a range of human activity, from handicraft to high tech, but is most commonly applied to industrial production, in which raw materials are transformed into finished goods on a large scale...
680	TT	Handicrafts
690	TH	Buildings
700	N	Arts ARts aRts, which stands for analog Real time synthesizer, is an audio framework that is no longer under development. It is best known for previously being used in KDE to simulate an analog synthesizer....
708	N400-3990	Museums
710	SB469-476	Landscape art
720	NA	Architecture Architecture Architecture is both the process and product of planning, designing and construction. Architectural works, in the material form of buildings, are often perceived as cultural and political symbols and as works of art...
730	NB	Plastic arts, Sculpture Sculpture Sculpture is three-dimensional artwork created by shaping or combining hard materials—typically stone such as marble—or metal, glass, or wood. Softer materials can also be used, such as clay, textiles, plastics, polymers and softer metals...
736	NB0001-1952	Carving Sculpture Sculpture is three-dimensional artwork created by shaping or combining hard materials—typically stone such as marble—or metal, glass, or wood. Softer materials can also be used, such as clay, textiles, plastics, polymers and softer metals...  & carvings Sculpture Sculpture is three-dimensional artwork created by shaping or combining hard materials—typically stone such as marble—or metal, glass, or wood. Softer materials can also be used, such as clay, textiles, plastics, polymers and softer metals...
738	NB0001-1952	Ceramic Ceramic A ceramic is an inorganic, nonmetallic solid prepared by the action of heat and subsequent cooling. Ceramic materials may have a crystalline or partly crystalline structure, or may be amorphous...  arts
739	NB0001-1952	Metalwork
740	NC	Drawing Drawing Drawing is a form of visual art that makes use of any number of drawing instruments to mark a two-dimensional medium. Common instruments include graphite pencils, pen and ink, inked brushes, wax color pencils, crayons, charcoal, chalk, pastels, markers, styluses, and various metals .An artist who...
740	NK	Decorative arts
746	NK8800-9505.5	Textile arts Textile arts Textile arts are those arts and crafts that use plant, animal, or synthetic fibers to construct practical or decorative objects.Textiles have been a fundamental part of human life since the beginning of civilization, and the methods and materials used to make them have expanded enormously, while...
748	NK5100-5440	Glass Glass Glass is an amorphous solid material. Glasses are typically brittle and optically transparent.The most familiar type of glass, used for centuries in windows and drinking vessels, is soda-lime glass, composed of about 75% silica plus Na2O, CaO, and several minor additives...
749	NK2200-2750	Furniture Furniture Furniture is the mass noun for the movable objects intended to support various human activities such as seating and sleeping in beds, to hold objects at a convenient height for work using horizontal surfaces above the ground, or to store things...  & accessories
750	ND	Painting Painting Painting is the practice of applying paint, pigment, color or other medium to a surface . The application of the medium is commonly applied to the base with a brush but other objects can be used. In art, the term painting describes both the act and the result of the action. However, painting is...
760	NE	Graphic arts Graphic arts A type of fine art, graphic art covers a broad range of art forms. Graphic art is typically two-dimensional and includes calligraphy, photography, drawing, painting, printmaking, lithography, typography, serigraphy , and bindery. Graphic art also consists of drawn plans and layouts for interior... , Printmaking Printmaking Printmaking is the process of making artworks by printing, normally on paper. Printmaking normally covers only the process of creating prints with an element of originality, rather than just being a photographic reproduction of a painting. Except in the case of monotyping, the process is capable...  & prints
761	NE1330-1352	Relief processes (Block printing)
763	NE2250-2570	Lithography Lithography Lithography is a method for printing using a stone or a metal plate with a completely smooth surface...
764	NE2236-2240.6	Chromolithography & serigraphy
765	NE1400-1879	Metal engraving
767	NE1940-2232.5	Etching & drypoint
770	TR	Photography Photography Photography is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light-sensitive material such as photographic film...  & photographs
780	M	Music Music Music is an art form whose medium is sound and silence. Its common elements are pitch , rhythm , dynamics, and the sonic qualities of timbre and texture...
781	MT	General principles & musical forms
782	M1495-5000	Vocal music
783	M1528-1529.5	Music for solo voice
784	M1000-1075	Orchestras, ensembles Musical ensemble A musical ensemble is a group of people who perform instrumental or vocal music. In classical music, trios or quartets either blend the sounds of musical instrument families or group together instruments from the same instrument family, such as string ensembles or wind ensembles...
785	M1000-1075	Ensembles with one instrument per part
786	MT180-255	Keyboard instrument Keyboard instrument A keyboard instrument is a musical instrument which is played using a musical keyboard. The most common of these is the piano. Other widely used keyboard instruments include organs of various types as well as other mechanical, electromechanical and electronic instruments...
787	MT259-338	Strings String instrument A string instrument is a musical instrument that produces sound by means of vibrating strings. In the Hornbostel-Sachs scheme of musical instrument classification, used in organology, they are called chordophones...
788	MT339-533	Wind Wind Wind is the flow of gases on a large scale. On Earth, wind consists of the bulk movement of air. In outer space, solar wind is the movement of gases or charged particles from the sun through space, while planetary wind is the outgassing of light chemical elements from a planet's atmosphere into space...
790	PN1560-1590	Performing arts
790	GV	Recreation
792	PN2000-3307	Theater and other stage presentations
793	GV1221-1469.63	Indoor games & amusements
795	GV1301-1311	Games of chance
796	GV557-1198.995	Sport Sport A Sport is all forms of physical activity which, through casual or organised participation, aim to use, maintain or improve physical fitness and provide entertainment to participants. Sport may be competitive, where a winner or winners can be identified by objective means, and may require a degree...
797	GV750-770.27	Air sports Air sports The term Air sports covers a range of aerial activities such as:* Aerobatics* Ballooning* General aviation including Air racing* Gliding* Hang gliding* Human powered aircraft* Model aircraft* Parachuting* Paragliding...
797	GV770.3-840	Aquatic sports
799	SK	Fishing Fishing Fishing is the activity of trying to catch wild fish. Fish are normally caught in the wild. Techniques for catching fish include hand gathering, spearing, netting, angling and trapping.... , Hunting Hunting Hunting is the practice of pursuing any living thing, usually wildlife, for food, recreation, or trade. In present-day use, the term refers to lawful hunting, as distinguished from poaching, which is the killing, trapping or capture of the hunted species contrary to applicable law... , Shooting Shooting Shooting is the act or process of firing rifles, shotguns or other projectile weapons such as bows or crossbows. Even the firing of artillery, rockets and missiles can be called shooting. A person who specializes in shooting is a marksman...
800	P	Literature Literature Literature is the art of written works, and is not bound to published sources...  & rhetoric Rhetoric Rhetoric is the art of discourse, an art that aims to improve the facility of speakers or writers who attempt to inform, persuade, or motivate particular audiences in specific situations. As a subject of formal study and a productive civic practice, rhetoric has played a central role in the Western...
810	PS	American literature American literature American literature is the written or literary work produced in the area of the United States and its preceding colonies. For more specific discussions of poetry and theater, see Poetry of the United States and Theater in the United States. During its early history, America was a series of British...
820	PR	English literature English literature English literature is the literature written in the English language, including literature composed in English by writers not necessarily from England; for example, Robert Burns was Scottish, James Joyce was Irish, Joseph Conrad was Polish, Dylan Thomas was Welsh, Edgar Allan Poe was American, J....
830	PT1-4897	German literature German literature German literature comprises those literary texts written in the German language. This includes literature written in Germany, Austria, the German part of Switzerland, and to a lesser extent works of the German diaspora. German literature of the modern period is mostly in Standard German, but there...
840	PQ0001-3999	French literature French literature French literature is, generally speaking, literature written in the French language, particularly by citizens of France; it may also refer to literature written by people living in France who speak traditional languages of France other than French. Literature written in French language, by citizens...
850	PQ4001-5999	Italian literature Italian literature Italian literature is literature written in the Italian language, particularly within Italy. It may also refer to literature written by Italians or in Italy in other languages spoken in Italy, often languages that are closely related to modern Italian....
860	PQ6001-8929	Spanish literature Spanish literature Spanish literature generally refers to literature written in the Spanish language within the territory that presently constitutes the state of Spain...
869	PQ9000-9999	Portuguese literature Portuguese literature This is a survey of Portuguese literature.The Portuguese language was developed gradually from the Vulgar language spoken in the countries which formed part of the Roman Empire and, both in morphology and syntax, it represents an organic transformation of Latin without the direct intervention of...
870	PA6001-8595	Latin literature Latin literature Latin literature includes the essays, histories, poems, plays, and other writings of the ancient Romans. In many ways, it seems to be a continuation of Greek literature, using many of the same forms...
880	PA3050-5660	Greek literature Greek literature Greek literature refers to writings composed in areas of Greek influence, typically though not necessarily in one of the Greek dialects, throughout the whole period in which the Greek-speaking people have existed.-Ancient Greek literature :...
890	PN	World literature World literature World literature refers to literature from all over the world, including African literature, American literature, Arabic literature, Asian literature, Australasian literature, Caribbean Literature, English literature, European literature, Indian literature, Latin American literature, Persian...
900	G	Geography Geography Geography is the science that studies the lands, features, inhabitants, and phenomena of Earth. A literal translation would be "to describe or write about the Earth". The first person to use the word "geography" was Eratosthenes...
900	D	History History History is the discovery, collection, organization, and presentation of information about past events. History can also mean the period of time after writing was invented. Scholars who write about history are called historians...
910	G	Geography Geography Geography is the science that studies the lands, features, inhabitants, and phenomena of Earth. A literal translation would be "to describe or write about the Earth". The first person to use the word "geography" was Eratosthenes...
911	G141	Historical geography
912	GA	Graphic representations of earth
914	G1791-2196	Geography of Europe Geography of Europe Europe is traditionally reckoned as one of seven continents. Physiographically, however, it is the northwestern peninsula of the larger landmass known as Eurasia : Asia occupies the eastern bulk of this continuous landmass and all share a common continental shelf...
915	G2200-2444	Geography of Asia Geography of Asia Geography of Asia reviews geographical concepts of classifying Asia, the central and eastern part of Eurasia, comprising approximately fifty countries.-Boundary:...
916	G2445-2739	Geography of Africa Geography of Africa Africa is a continent comprising 62 political territories, representing the largest of the great southward projections from the main mass of Earth's surface...
917	G1105-1692	Geography of North America Geography of North America North America is the third largest continent, or a portion of the second largest if North and South America are combined into the Americas and Africa, Europe and Asia are considered to be part of one supercontinent called Afro-Eurasia...
918	G1700-1779	Geography of South America Geography of South America The geography of South America contains many diverse regions and climates. Geographically, South America is generally considered a continent forming the southern portion of the American landmass, south and east of the Panama-Colombia border by most authorities, or south and east of the Panama Canal...
919	G2740-2799	Geography of Oceania Geography of Oceania As an ecozone, Oceania includes all of Micronesia, Fiji, and all of Polynesia except New Zealand. New Zealand, along with New Guinea and nearby islands, Australia, the Solomon Islands, Vanuatu, and New Caledonia, constitute the separate Australasia ecozone...
920	CT	Biography Biography A biography is a detailed description or account of someone's life. More than a list of basic facts , biography also portrays the subject's experience of those events...
920	CS	Genealogy Genealogy Genealogy is the study of families and the tracing of their lineages and history. Genealogists use oral traditions, historical records, genetic analysis, and other records to obtain information about a family and to demonstrate kinship and pedigrees of its members...
920	CR4480-4485	Insignia Insignia Insignia or insigne pl -nia or -nias : a symbol or token of personal power, status or office, or of an official body of government or jurisdiction...
930	D51-90	History of ancient world Ancient history Ancient history is the study of the written past from the beginning of recorded human history to the Early Middle Ages. The span of recorded history is roughly 5,000 years, with Cuneiform script, the oldest discovered form of coherent writing, from the protoliterate period around the 30th century BC...
938	DE	History of the Greco-Roman World
940	DAW1031-1051	History of Europe History of Europe History of Europe describes the history of humans inhabiting the European continent since it was first populated in prehistoric times to present, with the first human settlement between 45,000 and 25,000 BC.-Overview:...
942	DA	History of Britain History of the British Isles The history of the British Isles has witnessed intermittent periods of competition and cooperation between the people that occupy the various parts of Great Britain, Ireland, and the smaller adjacent islands, which together make up the British Isles, as well as with France, Germany, the Low...
943	DD	History of Germany
943.6	DB	History of Austria and Liechtenstein
943.9	DB	History of Hungary
944	DC	History of France History of France The history of France goes back to the arrival of the earliest human being in what is now France. Members of the genus Homo entered the area hundreds of thousands years ago, while the first modern Homo sapiens, the Cro-Magnons, arrived around 40,000 years ago...
945	DG	History of Italy History of Italy Italy, united in 1861, has significantly contributed to the political, cultural and social development of the entire Mediterranean region. Many cultures and civilizations have existed there since prehistoric times....
946	DP	History of the Iberian Peninsula Iberian Peninsula The Iberian Peninsula , sometimes called Iberia, is located in the extreme southwest of Europe and includes the modern-day sovereign states of Spain, Portugal and Andorra, as well as the British Overseas Territory of Gibraltar...
947	DJK	History of Eastern Europe
947	DK	History of Russia History of Russia The history of Russia begins with that of the Eastern Slavs and the Finno-Ugric peoples. The state of Garðaríki , which was centered in Novgorod and included the entire areas inhabited by Ilmen Slavs, Veps and Votes, was established by the Varangian chieftain Rurik in 862... , Soviet Union, and former Soviet republics.
948	DL	History of Northern Europe; Scandinavia
949.2	DH	History of the Netherlands
949.3	DH	History of Belgium
949.4	DQ	History of Switzerland
949.5	DF	History of Greece
949.6	DR	History of the Balkan Peninsula
950	DS	General history of Asia History of Asia The history of Asia can be seen as the collective history of several distinct peripheral coastal regions such as, East Asia, South Asia, and the Middle East linked by the interior mass of the Eurasian steppe....  and Far East
951	DS701-799.9	History of China History of China Chinese civilization originated in various regional centers along both the Yellow River and the Yangtze River valleys in the Neolithic era, but the Yellow River is said to be the Cradle of Chinese Civilization. With thousands of years of continuous history, China is one of the world's oldest...
952	DS801-897	History of Japan History of Japan The history of Japan encompasses the history of the islands of Japan and the Japanese people, spanning the ancient history of the region to the modern history of Japan as a nation state. Following the last ice age, around 12,000 BC, the rich ecosystem of the Japanese Archipelago fostered human...
953	DS201-248	History of Arabian Peninsula (History of Saudi Arabia History of Saudi Arabia The modern state of Saudi Arabia was founded in 1932 with the union of the kingdoms of the Hejaz and Nejd. Although the territory within the Kingdom of Saudi Arabia's boundaries is largely arid desert or rocky infertile terrain – home for much of its history to tribal nomadic societies with... , etc.)
954	DS401-486.8	History of India History of India The history of India begins with evidence of human activity of Homo sapiens as long as 75,000 years ago, or with earlier hominids including Homo erectus from about 500,000 years ago. The Indus Valley Civilization, which spread and flourished in the northwestern part of the Indian subcontinent from...
955	DS251-326	History of Iran History of Iran The history of Iran has been intertwined with the history of a larger historical region, comprising the area from the Danube River in the west to the Indus River and Jaxartes in the east and from the Caucasus, Caspian Sea, and Aral Sea in the north to the Persian Gulf and the Gulf of Oman and Egypt...  (Persia)
960	DT	History of Africa History of Africa The history of Africa begins with the prehistory of Africa and the emergence of Homo sapiens in East Africa, continuing into the present as a patchwork of diverse and politically developing nation states. Agriculture began about 10,000 BCE and metallurgy in about 4000 BCE. The history of early...
961	DT211-239	History of Libya History of Libya The History of Libya includes the history of its rich mix of ethnic groups added to the indigenous Berber tribes. Berbers, the bulk of Libya's population, have been present throughout the entire history of the country. For most of its history, Libya has been subjected to varying degrees of foreign...
961	DT241-269	History of Tunisia History of Tunisia The History of Tunisia is subdivided into the following articles:*Outlines of early Tunisia*History of Punic era Tunisia*History of Roman era Tunisia*History of early Islamic Tunisia*History of medieval Tunisia*History of Ottoman era Tunisia...
962	DT154.1-159.9	History of Sudan History of Sudan The history of Sudan extends from antiquity, and is intertwined with the history of Egypt, with which it was united politically over several periods. It is marked by influences on Sudan from neighboring areas and world powers...
962	DT43-154	History of Egypt History of Egypt Egyptian history can be roughly divided into the following periods:*Prehistoric Egypt*Ancient Egypt**Early Dynastic Period of Egypt: 31st to 27th centuries BC**Old Kingdom of Egypt: 27th to 22nd centuries BC...
963	DT371-390	History of Ethiopia History of Ethiopia This article covers the prehistory and history of Ethiopia.-Prehistory:Lucy, discovered in the Awash Valley of Ethiopia's Afar region, is considered the world's second-oldest, but most complete and best preserved, adult Australopithecine fossil...  (Abyssinia)
963	DT391-398	History of Eritrea History of Eritrea Eritrea is an ancient name, associated in the past with its Greek form Erythraía , and its derived Latin form Erythræa. This name relates to that of the Red Sea, then called the Erythræan Sea, from the Greek for "red", ἐρυθρος). The Italians created the colony of Eritrea in the 19th century around...
965	DT271-299	History of Algeria History of Algeria The history of Algeria takes place in the fertile coastal plain of North Africa, which is often called the Maghreb . North Africa served as a transit region for people moving towards Europe or the Middle East, thus, the region's inhabitants have been influenced by populations from other areas...
966	DT470-671	History of West Africa History of West Africa The partial history of West Africa can be divided into five major periods:#Its prehistory, in which the first human settlers arrived, agriculture developed, and contact made with the Mediterranean civilizations to the north....  & offshore islands
967	DT?	History of Central Africa & offshore islands
968	DT1701-2405	History of South Africa History of South Africa South African history has been dominated by the interaction and conflict of several diverse ethnic groups. The aboriginal Khoisan people have lived in the region for millennia. Most of the population, however, trace their history to immigration since...
969	DS349.8-349.9	History of South Indian Ocean islands
970	F	History of North America History of North America The history of North America is the study of the past, particularly the written record, oral histories, and traditions, passed down from generation to generation on the continent in the Earth's northern hemisphere and western hemisphere....
971	F1001-1145.2	History of Canada History of Canada The history of Canada covers the period from the arrival of Paleo-Indians thousands of years ago to the present day. Canada has been inhabited for millennia by distinctive groups of Aboriginal peoples, among whom evolved trade networks, spiritual beliefs, and social hierarchies...
972	F1421-1440	History of Central America History of Central America The history of Central America is the study of the past of the region known as Central America.- Before European contact :In pre-Columbian times, most of modern Central America was part of the Mesoamerican civilization. The Native American societies of Mesoamerica occupied the land ranging from...
972	F1201-1392	History of Mexico History of Mexico The history of Mexico, a country located in the southern portion of North America, covers a period of more than two millennia. First populated more than 13,000 years ago, the country produced complex indigenous civilizations before being conquered by the Spanish in the 16th Century.Since the...
973	E	History of United States
980	F2201-3799	History of South America History of South America The history of South America is the study of the past, particularly the written record, oral histories, and traditions, passed down from generation to generation on the continent in the Earth's western hemisphere and southern hemisphere. South America has a history that spans a wide range of human...
981	F2501-2659	History of Brazil History of Brazil The history of Brazil begins with the arrival of the first indigenous peoples, thousands of years ago by crossing the Bering land bridge into Alaska and then moving south....
982	F2801-3021	History of Argentina History of Argentina The history of Argentina is divided by historians into four main parts: the pre-Columbian time, or early history , the colonial period , the independence wars and the early post-colonial period of the nation and the history of modern Argentina .The beginning of prehistory in the present territory of...
983	F3051-3285	History of Chile History of Chile The territory of Chile has been populated since at least 2,000 BC. By the 16th century, Spanish conquistadors began to subdue and colonize the region of present-day Chile, and the territory became a colony from 1540 to 1818, when it gained independence from Spain...
984	F3301-3359	History of Bolivia History of Bolivia This is the history of Bolivia. See also the history of Latin America and the history of the Americas.Bolivia is a landlocked country in South America...
985	F3401-3619	History of Peru History of Peru The history of Peru spans several millennia, extending back through several stages of cultural development in the mountain region and the coastal desert....
987	F2301-2349	History of Venezuela History of Venezuela This article discusses the history of Venezuela. See also the history of South America.-Pre-Columbian period:Archeologists have discovered evidence of the earliest known inhabitants of the Venezuelan area in the form of leaf-shaped flake tools, together with chopping and plano–convex scraping...
988	F2351-2471	History of Guinea History of Guinea The modern state of Guinea did not come into existence until 1958, but the history of the area stretches back well before European intervention. Its current boundaries were deterimined during the colonial period by the Conference of Berlin and the French, who ruled Guinea until 1958.-West African...
990	DU	History of Oceania Oceania Oceania is a region centered on the islands of the tropical Pacific Ocean. Conceptions of what constitutes Oceania range from the coral atolls and volcanic islands of the South Pacific to the entire insular region between Asia and the Americas, including Australasia and the Malay Archipelago...
993	DU400-430	History of New Zealand History of New Zealand The history of New Zealand dates back at least 700 years to when it was discovered and settled by Polynesians, who developed a distinct Māori culture centred on kinship links and land. The first European explorer to discover New Zealand was Abel Janszoon Tasman on 13 December 1642...
994	DU80-398	History of Australia History of Australia The History of Australia refers to the history of the area and people of Commonwealth of Australia and its preceding Indigenous and colonial societies. Aboriginal Australians are believed to have first arrived on the Australian mainland by boat from the Indonesian archipelago between 40,000 to...
995	DU490	History of Melanesia
995	DU739-747	History of New Guinea
803	AG	Dictionaries and other general reference works
069	AM	Museums. Collectors and collecting
050	AP	Periodicals
060-068	AS	Academies and learned societies
030	AY	Yearbooks. Almanacs. Directories
001	AZ	History of scholarship and learning. The humanities
110-140	BD	Speculative philosophy
111.85	BH	Aesthetics
200	BL	Mythology
230	BT	Doctrinal Theology
240-260	BV	Practical Theology
280	BX	Christian Denominations
	C	Auxiliary Sciences of History Auxiliary sciences of history Auxiliary sciences of history are scholarly disciplines which help evaluate and use historical sources and are seen as auxiliary for historical research... (General)
909	CB	History of Civilization
930.1	CC	Archaeology
929.1 - 929.3	CD	Diplomatics. Archives. Seals
529	CE	Technical Chronology. Calendar
737	CJ	Numismatics
411.7	CN	Inscriptions. Epigraphy
929.6	CR	Heraldry
909.0491497	DX	History of the Gypsies
551.4	GB	Physical geography
551.46	GC	Oceanography
333.7	GE	Environmental Sciences
304	GF	Human ecology. Anthropogeography
310	HA	Social science statistics
330.9	HC	Economic history and conditions
331-338	HD	Industries. Land use. Labor
649.1-641.7	HQ	The family. Marriage. Women
	HT	Communities. Classes. Races
364	HV	Social pathology. Social and public welfare. Criminology
335	HX	Socialism. Communism. Anarchism
	J	General legislative and executive papers
320	JA	Political science (General)
320.5	JC	Political theory
	JJ	Political institutions and public administration (North America)
320.973	JK	Political institutions and public administration (United States)
320.971	JL	Political institutions and public administration (Canada, Latin America, etc.)
320.94	JN	Political institutions and public administration (Europe)
320.95-320.969	JQ	Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.)
	JV	Colonies and colonization. Emigration and immigration. International migration
	KB	Religious law in general. Comparative religious law. Jurisprudence
	KD	Law of the United Kingdom, Ireland, America. North America
340.971	KE	Law of Canada
340.973	KF	Law of United States
	KG	Law of Latin America - Mexico and Central America -West Indies. Caribbean area
	KH	Law of South America
340.94	KJ-KK	Law of Europe
340.95-340.969	KL-KW	Law of Asia and Eurasia, Africa, Pacific Area, and Antarctica
370.9	LA	History of education
370.1	LB	Theory and practice of education
	LC	Special aspects of education
378.73-378.79	LD	Individual educational institutions - United States
378.8	LE	Individual educational institutions - America (except United States)
378.4	LF	Individual educational institutions - Europe
378.5-378.6	LG	Individual educational institutions - Asia, Africa, Indian Ocean islands, Australia, New Zealand, Pacific islands
378	LH	College and school magazines and papers
	LJ	Student fraternities and societies, United States
	LT	Textbooks