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An encyclopedia (or encyclopaedia) is a comprehensive written compendium
Compendium

A compendium is a concise, yet comprehensive compilation of a body of knowledge. A compendium may summarize a larger work. In most cases the body of knowledge will concern some delimited field of human interest or endeavour , while a "universal" encyclopedia can be referred to as a compendium of all human knowledge....
 that holds information
Information

Information as a Conveyed concept has a diversity of meanings, from everyday usage to technical settings. Generally speaking, the concept of information is closely related to notions of constraint, communication, control system, data, form, instruction, knowledge, Meaning , stimulation, pattern, perception, and knowledge representation....
 from either all branches of knowledge
Knowledge

Knowledge is defined in the Oxford English Dictionary as expertise, and skills acquired by a person through experience or education; the theoretical or practical understanding of a subject, what is known in a particular field or in total; facts and information or awareness or familiarity gained by experience of a fact or situation....
 or a particular branch of knowledge. Encyclopedias are divided into article
Article (publishing)

An article is a stand-alone section of a larger written work. These nonfictional prose compositions appear in magazines, newspapers, academic journals, the Internet or any other type of publication....
s with one article on each subject covered.






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Encyclopedia


Brockhaus Lexikon
An encyclopedia (or encyclopaedia) is a comprehensive written compendium
Compendium

A compendium is a concise, yet comprehensive compilation of a body of knowledge. A compendium may summarize a larger work. In most cases the body of knowledge will concern some delimited field of human interest or endeavour , while a "universal" encyclopedia can be referred to as a compendium of all human knowledge....
 that holds information
Information

Information as a Conveyed concept has a diversity of meanings, from everyday usage to technical settings. Generally speaking, the concept of information is closely related to notions of constraint, communication, control system, data, form, instruction, knowledge, Meaning , stimulation, pattern, perception, and knowledge representation....
 from either all branches of knowledge
Knowledge

Knowledge is defined in the Oxford English Dictionary as expertise, and skills acquired by a person through experience or education; the theoretical or practical understanding of a subject, what is known in a particular field or in total; facts and information or awareness or familiarity gained by experience of a fact or situation....
 or a particular branch of knowledge. Encyclopedias are divided into article
Article (publishing)

An article is a stand-alone section of a larger written work. These nonfictional prose compositions appear in magazines, newspapers, academic journals, the Internet or any other type of publication....
s with one article on each subject covered. The articles on subjects in an encyclopedia are usually accessed alphabetically by article name and can be contained in one volume or many volumes, depending on the amount of material included.

Overview


Etymology

The word 'encyclopedia' comes from the Classical Greek
Ancient Greek

Ancient Greek is the historical stage in the development of the Greek language spanning across the Archaic Greece , Classical Greece , and Hellenistic civilization periods of ancient Greece and the classical antiquity....
  (transliterated "enkyklios paideia"), literally, a "[well-]rounded education", meaning "general knowledge". Though the notion of a compendium of knowledge dates back thousands of years, the term was first used in the title of a book in 1541 by Joachimus Fortius Ringelbergius, Lucubrationes vel potius absolutissima kyklopaideia (Basel, 1541). The word encyclopaedia was first used as a noun in the title of his book by the Croatian encyclopedist Pavao Skalic
Paul Skalic

Stanislav Pavao Skalic , also known as Paul Skalich or Paulus Scalichius de Lika, was a Croatian encyclopedist, Renaissance humanist, and adventurer born in Zagreb, Croatia, and who lived part of his life in Germany....
 in his Encyclopaedia seu orbis disciplinarum tam sacrarum quam prophanarum epistemon (Encyclopaedia, or Knowledge of the World of Disciplines, Basel, 1559). One of the oldest vernacular uses was by François Rabelais
François Rabelais

Fran?ois Rabelais was a major French Renaissance writer, doctor and Renaissance humanism. He was regarded as a writer of fantasy, satire, the grotesque, dirty jokes and bawdy songs....
 in his Pantagruel in 1532.

Several encyclopedias have names that include the suffix -p(a)edia, e.g., Banglapedia (on matters relevant for Bengal).

In British usage, the spellings encyclopedia and encyclopaedia are both current.Although the latter is considered 'proper', the former is becoming more common due to the encroachment of American English. In American usage, only the former is commonly used. The spelling encyclopædia—with the æ
Æ

? is a grapheme formed from the letters a and e. Originally a ligature representing a Latin diphthong, it has been promoted to the full status of a letter in the alphabets of many languages....
 ligature
Ligature (typography)

In writing and typography, a ligature occurs where two or more graphemes are joined as a single glyph. Ligatures usually replace consecutive characters sharing common components, and are part of a more general class of glyphs called "contextual forms" where the specific shape of a letter depends on context such as surrounding letters or prox...
—was frequently used in the 19th century and is increasingly rare, although it is retained in product titles such as Encyclopædia Britannica
Encyclopædia Britannica

The Encyclop?dia Britannica is a general English language encyclopedia published by Encyclop?dia Britannica, Inc., a privately held company....
 and others. The Oxford English Dictionary
Oxford English Dictionary

The Oxford English Dictionary , published by the Oxford University Press , is a comprehensive dictionary of the English language. Two fully-bound print editions of the OED have been published under its current name, in 1928 and 1989; as of December 2008 the dictionary's current editors have completed a quarter of the third edition....
 (1989) records encyclopædia and encyclopedia as equal alternatives (in that order), and notes the æ would be obsolete except that it is preserved in works that have Latin titles. Webster's Third New International Dictionary
Webster's Dictionary

Webster's Dictionary is the name given to a common type of English language dictionary in the United States. The name is derived from lexicographer Noah Webster and has become a genericized trademark for this type of dictionary....
 (1997–2002) features encyclopedia as the main headword and encyclopaedia as a minor variant. In addition, cyclopedia and cyclopaedia are now rarely-used shortened forms of the word originating in the 17th century.

Characteristics

The encyclopedia as we recognize it today was developed from the dictionary
Dictionary

A dictionary is a book of Alphabetical order listed words in a specific language, with definitions, etymologies, pronunciations, and other information; or a book of alphabetically listed words in one language with their equivalents in another, also known as a lexicon....
 in the 18th century. A dictionary primarily focuses on words and their definitions, and typically provides limited information
Information

Information as a Conveyed concept has a diversity of meanings, from everyday usage to technical settings. Generally speaking, the concept of information is closely related to notions of constraint, communication, control system, data, form, instruction, knowledge, Meaning , stimulation, pattern, perception, and knowledge representation....
, analysis, or background for the word defined. While it may offer a definition, it may leave the reader still lacking in understanding
Understanding

Understanding is a psychology process related to an abstract or physical object, such as a person, situation, or message whereby one is able to think about it and use concepts to deal adequately with that object....
 the meaning, significance or limitations of a term, and how the term relates to a broader field of knowledge.

To address those needs, an encyclopedia's article covers not a word, but a subject or discipline
List of academic disciplines

An academia discipline, or field of study, is a branch of knowledge which is teaching and researched at the college or university level. Disciplines are defined and recognized by the academic journals in which research is published, and the learned society and academic departments or faculties to which their practitioners belong....
, and treats it in more depth and conveys the most relevant accumulated knowledge on that subject. An encyclopedia also often includes many map
Map

A map is a visual representation of an area?a symbolic depiction highlighting relationships between elements of that space such as Object , regions, and topic-comment....
s and illustration
Illustration

An illustration is a Information graphic such as a drawing, painting, photograph or other work of art that stresses subject more than form. The aim of an illustration is to elucidate or decorate textual information by providing a visual representation....
s, as well as bibliography
Bibliography

Bibliography , as a practice, is the academic study of books as physical, cultural objects; in this sense, it is also known as bibliology ....
 and statistics
Statistics

Statistics is a Mathematics pertaining to the collection, analysis, interpretation or explanation, and presentation of data. It also provides tools for prediction and forecasting based on data....
. Historically, both encyclopedias and dictionaries have been researched and written by well-educated, well-informed content experts.

Four major elements define an encyclopedia: its subject matter, its scope, its method of organization, and its method of production.

  • Encyclopedias can be general, containing articles on topic
    Topic

    Topic can refer to:* An area of interest, also called a subject*What a composition is about; what is described by the main ideas and supporting details...
    s in every field (the English-language Encyclopædia Britannica
    Encyclopædia Britannica

    The Encyclop?dia Britannica is a general English language encyclopedia published by Encyclop?dia Britannica, Inc., a privately held company....
     and German Brockhaus are well-known examples). General encyclopedias often contain guides on how to do a variety of things, as well as embedded dictionaries and gazetteer
    Gazetteer

    A gazetteer is a geographical dictionary or Directory , an important reference for information about places and place names , used in conjunction with a map or a full atlas....
    s. There are also encyclopedias that cover a wide variety of topics but from a particular cultural, ethnic, or national perspective, such as the Great Soviet Encyclopedia
    Great Soviet Encyclopedia

    The Great Soviet Encyclopedia is one of the largest and most comprehensive encyclopedias in Russian, issued by the Sovetskaya entsiklopediya state publisher....
     or Encyclopaedia Judaica
    Encyclopaedia Judaica

    The Encyclopaedia Judaica is a 26-volume English-language encyclopedia of the Jewish people and their faith, Judaism. It covers diverse areas of the Jewish world and civilization, including Jewish history in all eras, culture, Jewish holiday, Hebrew language, Torah, and Halakha....
    .
  • Works of encyclopedic scope aim to convey the important accumulated knowledge for their subject domain, such as an encyclopedia of medicine, philosophy, or law. Works vary in the breadth of material and the depth of discussion, depending on the target audience
    Target audience

    In marketing and advertising, a target audience, or target group is the primary group of people that something, usually an advertising campaign, is aimed at appealing to....
    . (For example, the produced by A.D.A.M., Inc. for the U.S. National Institutes of Health
    National Institutes of Health

    The National Institutes of Health is an agency of the United States Department of Health and Human Services and is the primary agency of the United States government responsible for biomedical and health-related research....
    .)
Persian Encyclopedia
*Some systematic method of organization is essential to making an encyclopedia usable as a work of reference. There have historically been two main methods of organizing printed encyclopedias: the alphabetical method (consisting of a number of separate articles, organised in alphabetical order), or organization by hierarchical
Hierarchy

A 'hierarchy' is an arrangement of items The word derives from the Greek language , from ?e?????? , "president of sacred rites, high-priest" and that from , "sacred" + , "to lead, to rule"....
 categories. The former method is today the most common by far, especially for general works. The fluidity of electronic media, however, allows new possibilities for multiple methods of organization of the same content. Further, electronic media offer previously unimaginable capabilities for search, indexing and cross reference. The epigraph from Horace
Horace

This article is about the Roman poet Horace. For other uses, see Horace .Quintus Horatius Flaccus, , known in the English language world as Horace, was the leading Roman Empire Lyric poetry during the time of Augustus....
 on the title page of the 18th century Encyclopédie suggests the importance of the structure of an encyclopedia: "What grace may be added to commonplace matters by the power of order and connection."
  • As modern multimedia and the information age have evolved, they have had an ever-increasing effect on the collection, verification, summation, and presentation of information of all kinds. Projects such as Everything2
    Everything2

    Everything2, Everything2, or E2 for short, is a collaborative World Wide Web-based community consisting of a database of interlinked user-submitted written material....
    , Encarta
    Encarta

    Encartais a digital multimedia encyclopedia published by Microsoft. , the complete English version, Encarta Premium consists of more than 62,000 articles, numerous photos and illustrations, music clips, videos, interactivities, timelines, maps and atlas, and homework tools, and is available on the World Wide Web by yearly subscripti...
    , h2g2
    H2g2

    h2g2 is a collaborative Internet Internet encyclopedia project engaged in the construction of, in its own words, "an unconventional guide to life, the universe, and everything", in the spirit of the fictional publication The Guide from the comic science fiction series of The Hitchhiker's Guide to the Galaxy by Douglas Adams....
     and Wikipedia
    Wikipedia

    Wikipedia is a Free content, multilingualism encyclopedia project supported by the non-profit organization Wikimedia Foundation. Its name is a portmanteau of the words wiki and encyclopedia....
     are examples of new forms of the encyclopedia as information retrieval becomes simpler.


Some works titled "dictionaries" are actually similar to encyclopedias, especially those concerned with a particular field (such as the Dictionary of the Middle Ages
Dictionary of the Middle Ages

The Dictionary of the Middle Ages is a 13-volume encyclopedia of the Middle Ages published by the American Council of Learned Societies between 1982 and 1989....
, the Dictionary of American Naval Fighting Ships
Dictionary of American Naval Fighting Ships

The Dictionary of American Naval Fighting Ships is the primary reference work for the basic facts about every ship ever used by the United States Navy....
, and Black's Law Dictionary
Black's Law Dictionary

Black's Law Dictionary is the most widely-used law dictionary for the law of the United States. It was founded by Henry Campbell Black. It has been cited as legal authority in many Supreme Court cases ....
). The Macquarie Dictionary
Macquarie Dictionary

The Macquarie Dictionary is a dictionary of Australian English. It also pays considerable attention to New Zealand English. Originally it was a publishing project of Jacaranda Press, a Brisbane educational publisher, for which an editorial committee was formed, largely from the Linguistics department of Macquarie University in Sydney, Aus...
,
Australia's national dictionary, became an encyclopedic dictionary
Encyclopedic dictionary

An encyclopedic dictionary typically includes a large number of short listings, arranged alphabetically, and discussing a wide range of topics....
 after its first edition in recognition of the use of proper nouns in common communication, and the words derived from such proper nouns.

History


Pliny the Elder

Naturalishistoria
One of the earliest encyclopedic works to have survived to modern times is the Naturalis Historia
Naturalis Historia

Naturalis Historia is an encyclopedia written circa AD 77 by Pliny the Elder. It is one of the largest single works to have survived from the Roman empire to the modern day, and was one of the first reference works developed in the Classical period to examine natural and man-made objects, both organic and mineral, as well as many natura...
 of Pliny the Elder
Pliny the Elder

Gaius Plinius Secundus , better known as Pliny the Elder, was an ancient author, naturalist or natural philosopher and naval and military commander of some importance who wrote Natural History ....
, a Roman
Ancient Rome

Ancient Rome was a civilization that grew out of a small agricultural community founded on the Italian Peninsula as early as the 10th century BC....
 statesman living in the first century AD. He compiled a work of 37 chapters covering natural history, art and architecture, medicine, geography, geology and all aspects of the world about him. He stated in the preface that he had compiled 20,000 facts from 2000 different works by 100 authors, and added many others from his own experience. The work was published in 77 AD, although he probably never finished proofing the work before his untimely death in the eruption of Vesuvius in 79 AD.

The scheme of his great work is vast and comprehensive, being nothing short of a compendium of learning and of art so far as they are connected with nature, or draw their materials from nature. He admits that

My subject is a barren one - the world of nature, or in other words life; and that subject in its least elevated department, and employing either rustic terms or foreign, nay barbarian words that actually have to be introduced with an apology. Moreover, the path is not a beaten highway of authorship, nor one in which the mind is eager to range: there is not one of us who has made the same venture, nor yet one Greek who has tackled single-handed all departments of the subject.


And he admits the problems of writing such a work:

It is a difficult task to give novelty to what is old, authority to what is new, brilliance to the common-place, light to the obscure, attraction to the stale, credibility to the doubtful, but nature to all things and all her properties to nature.


Although there were earlier works of a similar nature, by Marcus Terentius Varro
Marcus Terentius Varro

Marcus Terentius Varro , also known as Varro Reatinus to distinguish him from his younger contemporary Varro Atacinus, was a Ancient Rome scholar and writer....
 for example, his was the only one to survive the Dark ages
Dark Ages

Dark Age or Dark Ages is a term in historiography referring to a period of cultural decline or societal collapse that took place in Western Europe between the Decline of the Roman Empire and the eventual recovery of learning....
. It became very popular in the Roman world, and survived, with many copies being made and distributed in the western world. It was one of the first classical manuscripts to be printed in 1469, and has remained popular ever since as a source of information on the Roman
Ancient Rome

Ancient Rome was a civilization that grew out of a small agricultural community founded on the Italian Peninsula as early as the 10th century BC....
 world, and especially Roman art
Roman art

Roman art includes the visual arts produced in Ancient Rome, and in the territories of the Roman empire. Major forms of Roman art are Roman architecture, painting, sculpture and mosaic work....
, Roman technology
Roman technology

Roman technology is the engineering practice which supported Roman civilization and made the expansion of Roman commerce and Roman military possible over nearly a thousand years....
 and Roman engineering
Roman engineering

The Roman Empire are generally famous for their advanced engineering accomplishments, although some of their own inventions were improvements on older ideas, concepts and inventions....
. It is also a recognised source for medicine
Medicine

Medicine is the art and science of healing. It encompasses a range of health care practices evolved to maintain and restore health by the prevention and treatment of illness....
, Roman art
Roman art

Roman art includes the visual arts produced in Ancient Rome, and in the territories of the Roman empire. Major forms of Roman art are Roman architecture, painting, sculpture and mosaic work....
, mineralogy
Mineralogy

Mineralogy is an Earth Science focused around the 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....
, zoology
Zoology

Zoology is the branch of biology concerned with the study of animals. The most common pronunciation of "zoology" is ; however, an alternative pronunciation is ....
, botany
Botany

Botany, plant science, phytology, or plant biology is a branch of biology and is the Scientific method of plant life and development....
, geology
Geology

Geology is the science and study of the solid and liquid matter that constitute the Earth. The field of geology encompasses the study of the composition, structural geology, physical properties, dynamics, and History of the Earth of Earth materials, and the processes by which they are formed, moved, and changed....
 and many other topics not discussed by other classical authors. Among many interesting entries are those for the elephant
Elephant

Elephants are large land mammals of the order Proboscidea and the family Elephantidae. There are three living species: the African Bush Elephant, the African Forest Elephant and the Asian Elephant ....
 and the murex
Murex

Murex is a genus of medium to large sized predatory tropical sea snails. These are carnivore marine gastropod molluscs in the family Muricidae, the murexes or rock snails....
 snail, the much sought-after source of Tyrian purple
Tyrian purple

Tyrian purple , also known as royal purple, imperial purple or imperial dye, is a purple-red dye which was first produced by the ancient Phoenicians in the city of Tyre, Lebanon....
 dye.

Although his work has been criticized for the lack of candour in checking the "facts", some of his text has been confirmed by recent research, like the spectacular remains of Roman gold mines in Spain, especially at Las Medulas
Las Médulas

Las M?dulas, located near the town of Ponferrada in the region of El Bierzo , used to be the most important gold gold mining in the Roman Empire....
, which Pliny probably saw in operation while a Procurator
Promagistrate

A promagistrate is a person who acts in and with the authority and capacity of a Roman Magistrates, but without holding a magisterial office. A legal innovation of the Roman Republic, the promagistracy was invented in order to provide Rome with governors of overseas territories instead of having to elect more magistrates each year....
 there a few years before he compiled the encyclopedia. Although many of the mining
Mining

Mining is the extraction of value minerals or other geology materials from the earth, usually from an ore body, vein or seam. Materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, Sodium chloride and potash....
 methods are now redundant, such as hushing
Hushing

Hushing is an ancient mining method using a flood or torrent of water to reveal mineral veins. The method was applied in several ways, both in prospecting for ores, and for their exploitation....
 and fire-setting
Fire-setting

Fire-setting is a method of mining used mostly in antiquity. Fires were set against a rock face to heat the Rock , which was then doused with water causing the stone to fracture by thermal shock....
, it is Pliny who recorded them for posterity, so helping us understand their importance in a modern context. Pliny makes clear in the preface to the work that he had checked his facts by reading and comparing the works of others, as well as referring to them by name. Many such books are now lost works and are remembered by his references, much like the lost sources mentioned in the work of Vitruvius
Vitruvius

File:Vitruvius.jpgMarcus Vitruvius Pollio was a Ancient Rome writer, architect and engineer , active in the 1st century BC. By his own description Vitruvius served as a Ballista , the third class of arms in the military offices....
 a century earlier.

Middle ages

Etymologiae Guntherus Ziner 1472
Saint Isidore of Seville, one of the greatest scholars of the early Middle Ages, is widely recognized as being the author of the first known encyclopaedia of the Middle Ages, the Etymologiae
Etymologiae

Etymologiae is an encyclopedia compiled byIsidore of Seville towards the end of his life, at the urging of his friend Braulio, Bishop of Saragossa, to whom Isidore, at the end of his life, sent his codex inemendatus , which seems to have begun circulating before Braulio was able to revise it, and issue it, with a dedication to t...
 (around 630), in which he compiled all learning available at his time, both ancient and modern, forming a huge piece of knowledge of 448 chapters in 20 volumes, which is very valuable not only for its significance, but also because of the quotes and fragments of texts by other authors that would have been lost had not it been done by Saint Isidore.

Bartholomeus Anglicus' De proprietatibus rerum (1240) was the most widely read and quoted encyclopedia in the High Middle Ages
High Middle Ages

The High Middle Ages was the periodization of history of Europe in the 11th, 12th, and 13th centuries . The High Middle Ages were preceded by the Early Middle Ages and followed by the Late Middle Ages, which by convention end around 1500....
 while Vincent of Beauvais
Vincent of Beauvais

The Dominican Order friar Vincent of Beauvais wrote the Speculum Maius, the main encyclopedia that was used in the Middle Ages....
's Speculum Majus (1260) was the most ambitious encyclopedia in the late-medieval period at over 3 million words.

Islam and Persia

The early Muslim compilations of knowledge
Historiography of early Islam

The historiography of early Islam refers to the study of the early origins of Islam based on a critical analysis, evaluation, and examination of authentic primary sources materials and the organization of these sources into a narrative timeline....
 in the Middle Ages included many comprehensive works, and much development of what we now call scientific method
Scientific method

Scientific method refers to techniques for investigating phenomenon, acquiring new knowledge, or correcting and integrating previous knowledge. To be termed scientific, a method of inquiry must be based on gathering observable, empirical and Measure evidence subject to specific principles of reasoning....
, historical method
Historical method

The historical method comprises the techniques and guidelines by which historians use primary sources and other evidence to research and then to historiography....
, and citation
Citation

A citation is a reference to a published or unpublished source . A bibliographic citation is a reference to a book, article , web page, or other published item....
. About year 960, the Brethren of Purity
Brethren of Purity

The Brethren of Purity were a mysterious secret society, whose identity has never been become clear, Early Islamic philosophy in Basra, Iraq - which was then the seat of the Abbasid Caliphate - sometime in the second half of the 10th century Common Era....
 of Basra
Basra

Al-Ba?rah is the capital of Basra Province, and had an estimated population of 1,052,200 as of 2003. Basra is also Iraq's main port. The city is the historic location of Sumer, the home of Sinbad the Sailor, and a proposed location of the Garden of Eden....
 were engaged in their Encyclopedia of the Brethren of Purity
Encyclopedia of the Brethren of Purity

The Encyclopedia of the Brethren of Purity was a large encyclopedia in 52 treatises written by the mysterious Brethren of Purity of Basra, Iraq sometime in the second half of the 900s Common Era ....
. Notable works include Abu Bakr al-Razi
Al-Razi

Abu Bakr Muhammad ibn Zakariya Razi , known as Rhazes or Rasis after medieval Latinists, was a Persian people Alchemy , Islamic medicine, Early Islamic philosophy and scholar....
's encyclopedia of science, the Mutazilite Al-Kindi
Al-Kindi

, also known to the Western world by the Latinized version of his name 'Alkindus', was an Arab polymath: an Early Islamic philosophy, Islamic science, Islamic astrology, Islamic astronomy, Alchemy and chemistry in Islam, Logic in Islamic philosophy, Islamic mathematics, Arabic music, Islamic medicine, Islamic physics, Islamic psychologi...
's prolific output of 270 books, and Ibn Sina's medical encyclopedia, which was a standard reference work for centuries. Also notable are works of universal history
Universal history

Universal history is basic to the Western tradition of historiography, especially the Abrahamic religion wellspring of that tradition. Simply stated, universal history is the presentation of the history of mankind as a whole, as a coherent unit....
 (or sociology) from Asharites, al-Tabri, al-Masudi, Tabari
Muhammad ibn Jarir al-Tabari

Abu Ja'far Muhammad ibn Jarir al-Tabari was one of the earliest, most prominent and famous Persian people historian and tafsir,who wrote exclusively in Arabic , most famous for his History of the Prophets and Kings and Tafsir al-Tabari....
's History of the Prophets and Kings, Ibn Rustah, al-Athir, and Ibn Khaldun
Ibn Khaldun

Ibn Khaldun or Ibn Khaldoun...
, whose Muqadimmah contains cautions regarding trust in written records that remain wholly applicable today. These scholars had an incalculable influence on methods of research and editing, due in part to the Islamic practice of isnad
Isnad

A hadith was originally just an Arabic story. As the stories began to be used formally it became common to provide their chain of transmitters, . The story proper was then called the matn....
 which emphasized fidelity to written record, checking sources, and skeptical inquiry.

By preserving Latin and Greek texts which would otherwise have been lost, they helped to rekindle the search for knowledge and methods of natural philosophy which would blaze again during the Renaissance
Renaissance

The Renaissance was a cultural movement that spanned roughly the 14th to the 17th century, beginning in Italy in the late Middle Ages and later spreading to the rest of Europe....
.

China

The enormous encyclopedic work in China of the Four Great Books of Song
Four Great Books of Song

The Four Great Books of Song was compiled by Li Fang and others during the Song Dynasty . The term was coined after the last book Cefu Yuangui had finished in compilation during the 11th century....
, compiled by the 11th century during the early Song Dynasty
Song Dynasty

The Song Dynasty was a ruling Chinese dynasty in China between 960–1279 AD; it succeeded the Five Dynasties and Ten Kingdoms Period, and was followed by the Yuan Dynasty....
 (960–1279), was a massive literary undertaking for the time. The last encyclopedia of the four, the Prime Tortoise of the Record Bureau
Prime Tortoise of the Record Bureau

The Prime Tortoise of the Record Bureau was the largest encyclopedia compiled during the Chinese Song Dynasty . It was the last of the Four Great Books of Song, the previous three encyclopedias published in the 10th century....
, amounted to 9.4 million Chinese characters in 1000 written volumes. There were many great encyclopedists throughout Chinese history, including the scientist and statesman Shen Kuo
Shen Kuo

Shen Kuo or Shen Kua , Chinese style name Cunzhong and Chinese style name#H?o Mengqi Weng, was a polymathic China History of science and technology in China and statesman of the Song Dynasty ....
 (1031–1095) with his Dream Pool Essays
Dream Pool Essays

The Dream Pool Essays was an extensive book written by the polymath Chinese scientist and statesman Shen Kuo by 1088 AD, during the Song Dynasty of China....
 of 1088, the statesman, inventor, and agronomist Wang Zhen
Wang Zhen (official)

Wang Zhen was an official of the Yuan Dynasty of China. He is credited with the invention of the first wooden movable type printing in the world, while his predecessor of the Song Dynasty , Bi Sheng , invented the world's first earthenware movable type printing....
 (active 1290–1333) with his Nong Shu of 1313, and the written Tiangong Kaiwu of Song Yingxing
Song Yingxing

Song Yingxing was a China scientist and encyclopedist who lived during the late Ming Dynasty . He was the author of an encyclopedia that covered a wide variety of technical subjects, including the use of gunpowder weapons....
 (1587–1666), the latter of whom was termed the "Diderot of China
Denis Diderot

Denis Diderot was a French philosopher and writer. He was a prominent figure during the Age of Enlightenment and is best known for serving as chief editor and contributor to the Encyclop?die....
" by British historian Joseph Needham
Joseph Needham

Noel Joseph Terence Montgomery Needham, Companion of Honour, Fellow of the Royal Society, Fellow of the British Academy , also known as Li Yuese , was a British academic and sinologist known for his research and writing on the history of Science and technology in China....
.

The Chinese emperor Yongle of the Ming Dynasty
Ming Dynasty

The Ming Dynasty , or Empire of the Great Ming , was the ruling Dynasties in Chinese history of China from 1368 to 1644, following the collapse of the Mongol-led Yuan Dynasty....
 oversaw the compilation of the Yongle Encyclopedia
Yongle Encyclopedia

The Yongle Encyclopedia was a Chinese compilation commissioned by the China Ming Dynasty emperor Yongle Emperor in 1403 and completed by 1408....
, one of the largest encyclopedias in history, which was completed in 1408 and comprised over 11,000 handwritten volumes, 370 million Chinese characters, of which only about 400 remain today. In the succeeding dynasty, emperor Qianlong of the Qing Dynasty
Qing Dynasty

The Qing Dynasty , also known as the Manchu Dynasty, followed the Ming Dynasty in History of China, and was the last ruling Chinese Dynasties of China, ruling from 1644 to 1912 ....
 personally composed 40,000 poems as part of a 4.7 million page library in 4 divisions, including thousands of essays, called the Siku Quanshu
Siku Quanshu

The Siku Quanshu, variously translated as the Imperial Collection of Four, Emperor's Four Treasuries, Complete Library in Four Branches of Literature, or Complete Library of the Four Treasuries, is the largest collection of books in Chinese history and probably the most ambitious editorial enterprise in the history of the...
 which is probably the largest collection of books in the world. It is instructive to compare his title for this knowledge, Watching the waves in a Sacred Sea to a Western-style title for all knowledge. Encyclopedic works, both in imitation of Chinese encyclopedias and as independent works of their own origin, have been known to exist in Japan since the ninth century CE.

These works were all hand copied and thus rarely available, beyond wealthy patrons or monastic men of learning: they were expensive, and usually written for those extending knowledge rather than those using it.

17th–19th centuries

Enc 1 Na5 600px
The beginnings of the modern idea of the general-purpose, widely distributed printed encyclopedia precede the 18th century encyclopedists. However, Chambers' Cyclopaedia, or Universal Dictionary of Arts and Sciences
Cyclopaedia, or Universal Dictionary of Arts and Sciences

Cyclop?dia Britannica Eleventh Edition, a publication now in the public domain. dia: or, A Universal Dictionary of Arts and Sciences was an encyclopedia published by Ephraim Chambers in London in 1728, and reprinted in numerous editions in the 18th century....
 (1728), and the Encyclopédie
Encyclopédie

Encyclop?die, ou dictionnaire raisonn? des sciences, des arts et des m?tiers was a general encyclopedia published in France between 1751 and 1772, with later supplements and revisions in 1772, 1777 and 1780 and numerous foreign editions and later derivatives....
 of Diderot and D'Alembert (1751 onwards), as well as Encyclopædia Britannica
Encyclopædia Britannica

The Encyclop?dia Britannica is a general English language encyclopedia published by Encyclop?dia Britannica, Inc., a privately held company....
 and the Conversations-Lexikon, were the first to realize the form we would recognize today, with a comprehensive scope of topics, discussed in depth and organized in an accessible, systematic method -- although it is notable that to an extent Chambers, in 1728, was following the still earlier lead of John Harris' Lexicon Technicum
Lexicon technicum

Lexicon Technicum: Or, An Universal English Dictionary of Arts and Sciences: Explaining not only the Terms of Art, but the Arts Themselves was in some respects the first alphabetical encyclopedia written in English, though it might rather be considered an encyclopedic dictionary....
, of 1704 and later editions (see also below), which was also by its title and content "A Universal English Dictionary of Arts and Sciences: Explaining not only the Terms of Art, but the Arts Themselves".

Much encyclopaedism of the French Renaissance
French Renaissance

French Renaissance is a recent term used to describe a Cultural movement and Art movement in France from the late 15th century to the early 17th century....
 was based upon the notion of not including every fact known to humans, but only that knowledge that was necessary, where necessity was judged by a wide variety of criteria, leading to works of greatly varying sizes. Béroalde de Verville
Béroalde de Verville

Fran?ois B?roalde de Verville was a French Renaissance novelist, poet and intellectual. He was the son of Matthieu Brouard , called "B?roalde", a professor of Agrippa d'Aubign? and Pierre de l'Estoile and a Huguenot; his mother, Marie Bletz, was the niece of the humanist and Hebrew scholar Fran?ois Watebled ....
 laid the foundation for his encyclopaedic works in a hexameral poem entitled Les cognoissances nécessaires for example. Often, the criteria had moral bases, such as in the case of Pierre de La Primaudaye
Pierre de La Primaudaye

Pierre de La Primaudaye was a French writer. He is known particularly for L'Academie Fran?aise, which was influential in English translations, from 1584 onwards, particularly The French Academie of 1618....
's L'Academie Française and Guillaume Telin's Bref sommaire des sept vertus &c.. Encyclopaedists encountered several problems with this approach, including how to decide what to omit as unnecessary, how to structure knowledge that resisted structure (often simply as a consequence of the sheer amount of material that deserved inclusion), and how to cope with the influx of newly discovered knowledge and the effects that it had on prior structures.

The term encyclopaedia was coined by 15th century humanists who misread copies of their texts of Pliny
Pliny the Elder

Gaius Plinius Secundus , better known as Pliny the Elder, was an ancient author, naturalist or natural philosopher and naval and military commander of some importance who wrote Natural History ....
 and Quintilian
Quintilian

Marcus Fabius Quintilianus was a Roman Empire rhetorician from Hispania, widely referred to in Middle ages schools of rhetoric and in Renaissance writing....
, and combined the two Greek words "enkuklios paideia" into one word.

The English physician and philosopher, Sir Thomas Browne
Thomas Browne

Sir Thomas Browne was an England author of varied works which disclose his wide learning in diverse fields including medicine, religion, science and the esoteric....
, specifically employed the word encyclopaedia as early as 1646 in the preface to the reader to describe his Pseudodoxia Epidemica
Pseudodoxia Epidemica

Sir Thomas Browne's vast work refuting the common errors and superstitions of his age, Pseudodoxia Epidemica, first appeared in 1646 and went through five subsequent editions, the last revision occurring in 1672....
 or Vulgar Errors, a series of refutations of common errors of his age. Browne structured his encyclopaedia upon the time-honoured schemata of the Renaissance, the so-called 'scale of creation' which ascends a hierarchical ladder via the mineral, vegetable, animal, human, planetary and cosmological worlds. Browne's compendium went through no less than five editions, each revised and augmented, the last edition appearing in 1672. Pseudodoxia Epidemica found itself upon the bookshelves of many educated European readers for throughout the late seventeenth and early eighteenth centuries it was translated, for many years it was not thought compatible with the French and Dutcheze, into the French, Dutch
Netherlands

The Netherlands is a country that is part of the Kingdom of the Netherlands. It is a parliamentary democratic constitutional monarchy. The Netherlands is located in North-West Europe, and bordered by the North Sea to the north and west, Belgium to the south, and Germany to the east....
 and German languages as well as Latin
Latin

Latin is an Italic language, historically spoken in Latium and Ancient Rome. Through the Military history of the Roman Empire, Latin spread throughout the Mediterranean and a large part of Europe....
.

John Harris
John Harris (writer)

John Harris , was an England writer. He is best known as the editor of the Lexicon Technicum , which ranks as the earliest of the long line of English Encyclopedia, and as the compiler of the Collection of Voyages and Travels which passes under his name....
 is often credited with introducing the now-familiar alphabetic format in 1704 with his English Lexicon Technicum: Or, A Universal English Dictionary of Arts and Sciences: Explaining not only the Terms of Art, but the Arts Themselves -- to give its full title. Organized alphabetically, its content does indeed contain explanation not merely of the terms used in the arts and sciences, but of the arts and sciences themselves. Sir Isaac Newton
Isaac Newton

Sir Isaac Newton, Fellow of the Royal Society was an English people physicist, mathematician, Astronomy, Natural philosophy, Alchemy, and Theology and one of the the 100 in human history....
 contributed his only published work on chemistry to the second volume of 1710. Its emphasis was on science -- and conformably to the broad 18th-century understanding of the term 'science', its content extends beyond what would be called science or technology today, and includes topics from the humanities and fine arts, e.g. a substantial number from law, commerce, music, and heraldry. At about 1200 pages, its scope can be considered as more that of an encyclopedic dictionary than a true encyclopedia. Harris himself considered it a dictionary; the work is one of the first technical dictionaries in any language.

Ephraim Chambers
Ephraim Chambers

Ephraim Chambers , was an England writer and encyclopedist, who is primarily known for producing the Cyclopaedia, or Universal Dictionary of Arts and Sciences....
 published his Cyclopaedia
Cyclopaedia, or Universal Dictionary of Arts and Sciences

Cyclop?dia Britannica Eleventh Edition, a publication now in the public domain. dia: or, A Universal Dictionary of Arts and Sciences was an encyclopedia published by Ephraim Chambers in London in 1728, and reprinted in numerous editions in the 18th century....
 in 1728. It included a broad scope of subjects, used an alphabetic arrangement, relied on many different contributors and included the innovation of cross-referencing other sections within articles. Chambers has been referred to as the father of the modern encyclopedia for this two-volume work.

A French translation of Chambers' work inspired the Encyclopédie
Encyclopédie

Encyclop?die, ou dictionnaire raisonn? des sciences, des arts et des m?tiers was a general encyclopedia published in France between 1751 and 1772, with later supplements and revisions in 1772, 1777 and 1780 and numerous foreign editions and later derivatives....
, perhaps the most famous early encyclopedia, notable for its scope, the quality of some contributions, and its political and cultural impact in the years leading up to the French revolution
French Revolution

The French Revolution was a period of political and social upheaval and radical change in the history of France, during which the French governmental structure, previously an absolute monarchy with feudalism for the aristocracy and Roman Catholic Church clergy, underwent radical change to forms based on Age of Enlightenment principles of cit...
. The Encyclopédie was edited by Jean le Rond d'Alembert
Jean le Rond d'Alembert

Jean le Rond d'Alembert was a France mathematician, mechanics, physicist and philosopher. He was also co-editor with Denis Diderot of the Encyclop?die....
 and Denis Diderot
Denis Diderot

Denis Diderot was a French philosopher and writer. He was a prominent figure during the Age of Enlightenment and is best known for serving as chief editor and contributor to the Encyclop?die....
 and published in 17 volumes of articles, issued from 1751 to 1765, and 11 volumes of illustrations, issued from 1762 to 1772. Five volumes of supplementary material and a two volume index, supervised by other editors, were issued from 1776 to 1780 by Charles Joseph Panckoucke.

The Encyclopédie represented the essence of the French Enlightenment. The prospectus stated an ambitious goal: the Encyclopédie was to be a systematic analysis of the "order and interrelations of human knowledge." Diderot, in his , went further: "to collect all the knowledge that now lies scattered over the face of the earth, to make known its general structure to the men among we live, and to transmit it to those who will come after us," to make men not only wiser but also "more virtuous and more happy."

Realizing the inherent problems with the model of knowledge he had created, Diderot's view of his own success in writing the Encyclopédie were far from ecstatic. Diderot envisioned the perfect encyclopedia as more than the sum of its parts. In his own article on the encyclopedia, Diderot also wrote, "Were an analytical dictionary of the sciences and arts nothing more than a methodical combination of their elements, I would still ask whom it behooves to fabricate good elements." Diderot viewed the ideal encyclopedia as an index of connections. He realized that all knowledge could never be amassed in one work, but he hoped the relations among subjects could be.

The Encyclopédie in turn inspired the venerable Encyclopædia Britannica
Encyclopædia Britannica

The Encyclop?dia Britannica is a general English language encyclopedia published by Encyclop?dia Britannica, Inc., a privately held company....
,
which had a modest beginning in Scotland: the first edition, issued between 1768 and 1771, had just three hastily completed volumes - A-B, C-L, and M-Z - with a total of 2,391 pages. By 1797, when the third edition was completed, it had been expanded to 18 volumes addressing a full range of topics, with articles contributed by a range of authorities on their subjects.

The German-language Conversations-Lexikon was published at Leipzig
Leipzig

Leipzig is, with a population of over 511,252, the largest city in the States of Germany of Saxony, Germany....
 from 1796 to 1808, in 6 volumes. Paralleling other 18th century encyclopedias, its scope was expanded beyond that of earlier publications, in an effort at comprehensiveness. It was, however, intended not for scholarly use but to provide results of research and discovery in a simple and popular form without extensive detail. This format, a contrast to the Encyclopædia Britannica
Encyclopædia Britannica

The Encyclop?dia Britannica is a general English language encyclopedia published by Encyclop?dia Britannica, Inc., a privately held company....
, was widely imitated by later 19th century encyclopedias in Britain, the United States, France, Spain, Italy and other countries. Of the influential late-18th century and early-19th century encyclopedias, the Conversations-Lexikon is perhaps most similar in form to today's encyclopedias.

The early years of the 19th century saw a flowering of encyclopedia publishing in the United Kingdom, Europe and America. In England Rees's Cyclopaedia
Rees's Cyclopaedia

Rees's Cyclop?dia, or The New Cyclopaedia, or, Universal Dictionary of the Arts and Sciences was edited by Revd. Abraham Rees . It appeared in parts between January 1802 and August 1820, and ran to 39 volumes of text, 5 volumes of plates, and an atlas....
 (1802–1819) contains an enormous amount in information about the industrial and scientific revolutions of the time. A feature of these publications is the high-quality illustrations made by engravers like Wilson Lowry
Wilson Lowry

Wilson Lowry was an England engraver. He was born at Whitehaven, Cumberland, the son of Strickland Lowry, a portrait painter. The family settled in Worcester, and Wilson Lowry, as a boy, left home to work as a house painter in London and Arundel, Sussex....
 of art work supplied by specialist draftsmen like John Farey, Jr.
John Farey, Jr.

John Farey, Jr. was a mechanical engineering. He was the eldest son of John Farey, Sr., the geology, and was born at Lambeth, London on March 20, 1791....
 Encyclopaedias were published in Scotland, as a result of the Scottish Enlightenment
Scottish Enlightenment

The Scottish Enlightenment was the period in 18th century Scotland characterised by an outpouring of intellectual and scientific accomplishments....
, for education there was of a higher standard than in the rest of the United Kingdom.

The 17-volume Grand dictionnaire universel du XIXe siècle and its supplements were published in France from 1866 to 1890.

Encyclopædia Britannica appeared in various editions throughout the century, and the growth of popular education
Popular education

Popular education is at the crossroads between politics and pedagogy, and strongly relies on the democratic ideal of the Age of Enlightenment, which considered public education as a main tool of individual and collective emancipation, and thus the necessary conditions of autonomy, in accordance to Immanuel Kant's Was Ist Aufkl?rung? , pub...
 and the Mechanics Institutes, spearheaded by the Society for the Diffusion of Useful Knowledge
Society for the Diffusion of Useful Knowledge

The Society for the Diffusion of Useful Knowledge, founded in 1826, was a British Whig Party London organisation that published inexpensive texts intended to adapt scientific and similarly high-minded material for the rapidly expanding reading public....
 led to the production of the Penny Cyclopaedia
Penny Cyclopaedia

The Penny Cyclop?dia of the Society for the Diffusion of Useful Knowledge was a multi-volume encyclopedia edited by George Long and published by Charles Knight alongside the Penny Magazine....
, as its title suggests issued in weekly numbers at a penny each like a newspaper
Newspaper

A newspaper is a publication containing news, information and advertising, usually printed on low-cost paper called newsprint. General-interest newspapers often feature articles on Politics, crime, business, art/entertainment, society and sports....
.

In the early 20th century, the Encyclopædia Britannica reached its eleventh edition, and inexpensive encyclopedias such as Harmsworth's Encyclopaedia and Everyman's Encyclopaedia
Everyman's Encyclopaedia

Everyman's Encyclopaedia is an encyclopedia published by Joseph Malaby Dent from 1913 as part of the Everyman's Library....
 were common.

20th century

Ad Encyclopaedia Britannica 05 1913
In the United States, the 1950s and 1960s saw the introduction of several large popular encyclopedias, often sold on installment plans. The best known of these were World Book and Funk and Wagnalls
Funk and Wagnalls

Funk & Wagnalls is a publisher based in New York City known for its reference works, including an encyclopedia, content from which became a part of Microsoft's Encarta digital encyclopedia....
.

The second half of the 20th century also saw the publication of several encyclopedias that were notable for synthesizing important topics in specific fields, often by means of new works authored by significant researchers. Such encyclopedias included The Encyclopedia of Philosophy (first published in 1967 and now in its second edition), and Elsevier's Handbooks In Economics series. Encyclopedias of at least one volume in size exist for most if not all Academic disciplines, including, typically, such narrow topics such as bioethics
Bioethics

Bioethics is the philosophical study of the ethics controversies brought about by advances in biology and medicine. Bioethicists are concerned with the ethical questions that arise in the relationships among life sciences, biotechnology, medicine, politics, law, philosophy, and theology....
 and African American history
African American history

African American history is the portion of American history that specifically discusses the African American or Black people American ethnic group in the United States....
.

By the late 20th century, encyclopedias were being published on CD-ROM
CD-ROM

CD-ROM is a pre-pressed Compact Disc that contains Computer data storage accessible to, but not writable by, a computer. While the Compact Disc format was originally designed for music storage and playback, the 1985 Yellow Book standard developed by Sony and Philips adapted the format to hold any form of Binary file....
s for use with personal computers. Microsoft
Microsoft

Microsoft Corporation is a multinational corporation computer technology corporation that develops, manufactures, licenses, and supports a wide range of computer software products for computing devices....
's Encarta
Encarta

Encartais a digital multimedia encyclopedia published by Microsoft. , the complete English version, Encarta Premium consists of more than 62,000 articles, numerous photos and illustrations, music clips, videos, interactivities, timelines, maps and atlas, and homework tools, and is available on the World Wide Web by yearly subscripti...
 was a landmark example, as it had no print version. Articles were supplemented with video and audio files as well as numerous high-quality images. Similar encyclopedias were also being published online, and made available by subscription.

Traditional encyclopedias are written by a number of employed text writers, usually people with an academic degree
Academic degree

A degree is any of a wide range of status levels conferred by institutions of higher education, such as University, normally as the result of successfully completing a program of study....
, and distributed as proprietary
Intellectual property

Intellectual property are law property over creations of the mind, both artistic and commercial, and the corresponding fields of law. Under intellectual property law, owners are granted certain exclusive rights to a variety of intangible assets, such as musical, literary, and artistic works; ideas, discoveries and inventions; and words, phra...
 content.

Encyclopedias are essentially derivative from what has gone before, and particularly in the 19th century, copyright infringement
Copyright infringement

Copyright infringement is the unauthorized use of material that is covered by copyright law, in a manner that violates one of the copyright owner's exclusive rights, such as the right to reproduce or perform the copyrighted work, or to make derivative works....
 was common among encyclopedia editors. However, modern encyclopedias are not merely larger compendia, including all that came before them. To make space for modern topics, valuable material of historic use regularly had to be discarded, at least before the advent of digital encyclopedias. Moreover, the opinions and world views of a particular generation can be observed in the encyclopedic writing of the time. For these reasons, old encyclopedias are a useful source of historical information, especially for a record of changes in science and technology. As of 2007, old encyclopedias whose copyright has expired
Public domain

File:PD-icon.svgThe public domain is a range of abstract materials?commonly referred to as intellectual property?which are not owned or controlled by anyone....
, such as the 1911 edition of Britannica, are also the only free content
Free content

Free content, or free information, is any kind of functional work, Work of art, or other creative Content having no significant legal restriction relative to people's freedom to use, redistribute, and produce modified versions of and works derived from the content....
 encyclopedias released in print form. (In English; works such as the Great Soviet Encyclopedia
Great Soviet Encyclopedia

The Great Soviet Encyclopedia is one of the largest and most comprehensive encyclopedias in Russian, issued by the Sovetskaya entsiklopediya state publisher....
 which were created in the public domain exist as free content encyclopedias in other languages.)

Wikipedia Logo
Free encyclopedia
The concept of a new free encyclopedia began with the Interpedia
Interpedia

The Interpedia was the name given to the first proposals for an Internet encyclopedia which would allow anyone to contribute by writing articles and submitting them to the central catalog of all Interpedia pages....
 proposal on Usenet
Usenet

Usenet, a portmanteau of "user" and "network", is a worldwide distributed Internet discussion system. It evolved from the general purpose UUCP architecture of the same name....
 in 1993, which outlined an Internet-based online encyclopedia to which anyone could submit content and that would be freely accessible. Early projects in this vein included Everything2
Everything2

Everything2, Everything2, or E2 for short, is a collaborative World Wide Web-based community consisting of a database of interlinked user-submitted written material....
 and Open Site
Open Site

Open-Site, the Open Encyclopedia Project, is a free internet encyclopedia founded in 2002 by Michael J. Flickinger in an effort to build a free categorized community-built encyclopedia, inspired by the Open Directory Project....
. In 1999, Richard Stallman
Richard Stallman

Richard Matthew Stallman , often abbreviated "rms","'Richard Stallman' is just my mundane name; you can call me 'rms'"|last= Stallman...
 proposed the GNUPedia
GNUpedia

GNUPedia was a project to create a free content encyclopedia under the auspices of the Free Software Foundation. The idea for the project was initially proposed by Richard Stallman in 1999 and officially started in January 2001....
, an online encyclopedia which, similar to the GNU operating system, would be a "generic" resource. The concept was very similar to Interpedia, but more in line with Stallman's GNU
GNU

GNU is a computer operating system composed entirely of free software. Its name is a recursive acronym for GNU's Not Unix; it was chosen because its design is Unix-like, but differs from Unix by being free software and containing no Unix code....
 philosophy.

It was not until Nupedia
Nupedia

Nupedia was an English-language World Wide Web encyclopedia whose articles were written by experts and licensed as free content. It was founded by Jimmy Wales and underwritten by Bomis, with Larry Sanger as editor-in-chief....
 and later Wikipedia
Wikipedia

Wikipedia is a Free content, multilingualism encyclopedia project supported by the non-profit organization Wikimedia Foundation. Its name is a portmanteau of the words wiki and encyclopedia....
 that a stable free encyclopedia project was able to be established on the Internet. The English Wikipedia became the world's largest encyclopedia in 2004 at the 300,000 article stage and by late 2005, Wikipedia had produced over two million articles in more than 80 languages with content licensed under the copyleft
Copyleft

File:Copyleft.svgCopyleft is a Word play on the word copyright to describe the practice of using copyright law to remove restrictions on distributing copies and modified versions of a work for others and requiring that the same freedoms be preserved in modified versions....
 GNU Free Documentation License
GNU Free Documentation License

The GNU Free Documentation License is a copyleft license for free documentation, designed by the Free Software Foundation for the GNU Project....
. As of December 2008, Wikipedia has over 2.6 million articles in English and well over 8 million combined in over 250 languages. Since then other free encyclopedias like Citizendium
Citizendium

Citizendium is an English language wiki-based free content encyclopedia project spearheaded by Larry Sanger, who co-founded Wikipedia in 2001....
 and Knol
Knol

Knol is a Google project which aims to include user-written articles on a range of topics. The project was led by Udi Manber of Google, it was announced on December 13, 2007 and was opened in beta to the public on July 23, 2008 with a few hundred articles mostly in the health and medical field....
 have appeared.

21st century

Encarta Visual Browser
The encyclopedia's hierarchical structure and evolving nature is particularly adaptable to a disk
Disk storage

Disk storage is a general category of a computer storage mechanisms, in which data is recorded on planar, round and rotating surfaces . A disk drive is a peripheral device used to record and retrieve information....
-based or on-line computer
Computer

A computer is a machine that manipulates Data according to a list of Code .The first devices that resemble modern computers date to the mid-20th century , although the computer concept and various machines similar to computers existed earlier....
 format
Format

:For help on formatting Wikipedia articles, see...
, and all major printed multi-subject encyclopedias had moved to this method of delivery by the end of the 20th century. Disk-based (typically DVD-ROM or CD-ROM
CD-ROM

CD-ROM is a pre-pressed Compact Disc that contains Computer data storage accessible to, but not writable by, a computer. While the Compact Disc format was originally designed for music storage and playback, the 1985 Yellow Book standard developed by Sony and Philips adapted the format to hold any form of Binary file....
 format) publications have the advantage of being cheaply produced and easily portable. Additionally, they can include media
Electronic media

Electronic media are media that utilize electronics or electromechanical energy for the end user to access the content. This is in contrast to static media , which are most often Desktop publishing, but don't require electronics to be accessed by the end user in the printed form....
 which are impossible to store in the printed format, such as animation
Animation

Animation is the rapid display of a sequence of images of 2-D or 3-D artwork or model positions in order to create an illusion of movement. It is an optical illusion of Motion due to the phenomenon of persistence of vision, and can be created and demonstrated in a number of ways....
s, audio, and video
Video

Video is the technology of electronics Videography, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing Scene in motion....
. Hyperlink
Hyperlink

In computing, a hyperlink, usually shortened to link, is a directly followable reference within a hypertext document.The area from which the hyperlink can be activated is called its anchor; its target is what the link points to, which may be another location within the same page or document, another page or document, or a...
ing between conceptually related items is also a significant benefit. On-line encyclopedias offer the additional advantage of being (potentially) dynamic: new information can be presented almost immediately, rather than waiting for the next release of a static format (as with a disk- or paper-based publication). Many printed encyclopedias traditionally published annual supplemental volumes ("yearbooks") to update events between editions, as a partial solution to the problem of staying up-to-date, but this of course required the reader to check both the main volumes and the supplemental volume(s). Some disk-based encyclopedias offer subscription-based access to online updates, which are then integrated with the content already on the user's hard disk in a manner not possible with a printed encyclopedia.

Information in a printed encyclopedia necessarily needs some form of hierarchical structure. Traditionally, the method employed is to present the information ordered alphabetically by the article title. However with the advent of dynamic electronic formats the need to impose a pre-determined structure is less necessary. Nonetheless, most electronic encyclopedias still offer a range of organizational strategies for the articles, such as by subject area or alphabetically.

CD-ROM and Internet-based encyclopedias also offer greater search abilities than printed versions. While the printed versions rely on indexes to assist in searching for topics, computer accessible versions allow searching through article text for keywords or phrases.

See also

  • List of encyclopedias
    List of encyclopedias

    This article contains a list of encyclopedias, including projects to create new works. Because the number of works that can be considered encyclopedias is very large, this list does not attempt to be comprehensive....
  • List of online encyclopedias
    List of online encyclopedias

    This is a list of online encyclopedias, which are accessible on the World Wide Web....
  • Encyclopedic dictionary
    Encyclopedic dictionary

    An encyclopedic dictionary typically includes a large number of short listings, arranged alphabetically, and discussing a wide range of topics....
  • Biographical dictionary
    Biographical dictionary

    Biographical dictionaries — a type of encyclopedic dictionary limited to biographical information — have been written in many languages....
  • Dictionary
    Dictionary

    A dictionary is a book of Alphabetical order listed words in a specific language, with definitions, etymologies, pronunciations, and other information; or a book of alphabetically listed words in one language with their equivalents in another, also known as a lexicon....
  • Lexicon
    Lexicon

    In linguistics, the lexicon of a language is its vocabulary, including its words and expressions. More formally, it is a language's inventory of lexemes....
  • Thesaurus
    Thesaurus

    A thesaurus is a work that contains synonyms and sometimes antonyms, in contrast to a dictionary, which contains definitions and pronunciations....
  • History of science and technology
    History of science and technology

    The history of science and technology is a field of history which examines how humanity's understanding of nature and ability to manipulate it have changed over the millennia....
  • Library and information science
  • Lexicography
    Lexicography

    The pursuit of lexicography is divided into two related disciplines:*Practical lexicography is the art or craft of compiling, writing and editing dictionary....
  • Fictitious entry
    Fictitious entry

    Fictitious entries, also known as fake entries, Mountweazels, and Nihilartikels, are deliberately incorrect entries or articles in reference works such as dictionaries, encyclopedias, maps and directories....


External links

  • (includes Wikipedia)
  • - Biographical errors in encyclopedias and almanacs
  • - Diderot's article on the Encyclopedia from the original Encyclopédie
    Encyclopédie

    Encyclop?die, ou dictionnaire raisonn? des sciences, des arts et des m?tiers was a general encyclopedia published in France between 1751 and 1772, with later supplements and revisions in 1772, 1777 and 1780 and numerous foreign editions and later derivatives....
    .
  • - First Renaissance encyclopedia
  • - Online Comprehensive Science Encyclopedia
  • - CNET
    CNET

    CNET Networks, Inc. was a mass media corporation based in San Francisco, California, United States. The company was co-founded in 1993 by Halsey Minor and Shelby Bonnie....
     article
  • - a list of encyclopedias online
  • University of Wisconsin - Stout listing by category
  • , 1728, with the 1753 supplement
  • , 1851, Francis Lieber
    Francis Lieber

    Dr. 'Francis Lieber' , originally known as 'Franz Lieber', was a German-American jurist and political philosopher. Aside from being the first American to take the title of political science, he is most widely known as the author of the Lieber Code during the American Civil War, also known as Code for the Government of Armies in the Fi...
     ed. (Boston: Mussey & Co.) at the University of Michigan Making of America site
  • , articles and illustrations from 9th ed., 1875–89, and 10th ed., 1902–03.
  • , 11th ed., 1911, at the LoveToKnow site.