sentence: Encyclopedias are a great source of knowledge.
sentences_before: The word, encyclopedia, was put in the title of some encyclopedias. Companies were started for the purpose of publishing encyclopedias for the public use in libraries, which is different from when an encyclopedia was the curriculum of a private school. Like dictionaries, these publishers hired hundreds of experts to write articles and read and choose articles. Some internet encyclopedias allowed their paying customers to submit articles. Other internet encyclopedias accepted writing from non-paying users of the encyclopedia.
sentences_after: They are included with many different topics.
concept_name: encyclopedia
headings: Encyclopedia
categories: Reference works