The Encyclopædia Britannica is a general knowledge English-language encyclopaedia. It has been published by Encyclopædia Britannica, Inc. since 1768, although the company has changed ownership seven times. The encyclopaedia is maintained by about 100 full-time editors and more than 4,000 contributors. The 2010 version of the 15th edition, which spans 32 volumes and 32,640 pages, was the last printed edition. Since 2016, it has been published exclusively as an online encyclopaedia.
The 15th edition of the Britannica; the initial volume with the green spine is the Propædia; the red-spined and black-spined volumes are the Micropædia and the Macropædia, respectively. The last three volumes are the 2002 Book of the Year (black spine) and the two-volume index (cyan spine).
Children's Britannica
Thomas Spencer Baynes, editor of the 9th edition. This portrait, painted in 1888, hangs in the Senate Room of the University of St Andrews.
The title page of the first edition of the Encyclopædia Britannica, published in 1771
An encyclopedia or encyclopaedia is a reference work or compendium providing summaries of knowledge, either general or special, in a particular field or discipline. Encyclopedias are divided into articles or entries that are arranged alphabetically by article name or by thematic categories, or else are hyperlinked and searchable. Encyclopedia entries are longer and more detailed than those in most dictionaries. Generally speaking, encyclopedia articles focus on factual information concerning the subject named in the article's title; this is unlike dictionary entries, which focus on linguistic information about words, such as their etymology, meaning, pronunciation, use, and grammatical forms.
Entry for the French word "Amour" (Love) in a paper encyclopedia (Larousse Universel) and in an online encyclopedia (Wikimini.org).
Title page of Lucubrationes, 1541 edition, one of the first books to use a variant of the word encyclopedia in the title
Naturalis Historiæ, 1669 edition, title page
Isidore of Seville author of Etymologiae (10th. century Ottonian manuscript)
