Pliny the Elder （老普林尼）wrote the （ one） encyclopedia with the help of his nephew. This work is made up of 37 books and had many （ subject） such as anthropology（人类学）and painting. Through the following few centuries, encyclopedia were connected to religion. The first Christian edition appeared in 560 AD, the first Muslim volume came to light soon after.
One of （ long） encyclopedia ever was produced in 1403 when The Yongle Encyclopedia appeared in China. It had 11, 095 volumes. Most of the original work （ lose） through the centuries, and people can see less than 400 volumes today. The word "encyclopedia" coming from Greek （ mean） "a general knowledge". It has been in use at least 500 years.
In 20th century, the Encyclopedia Britannica became the most well known （ west） work of this type. At the same time, topical encyclopedia became the most popular, covering different topics. At the end of the century, many publishers began to publish （ they） in digital formats such as Compact Discs （CDs） and Digital Versatile Discs （DVDs）.
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