中文大百科网cyclopedia是一部在线的中文网络百科全书，涉及文化艺术、科学、人文地理、技术、人物、自然科学等多门学科，是一部比较全面的百科全书网站
Information Please包含在线词典，互联网百科全书，和历书参考。Infoplease is a free, authoritative, and respected reference for Internet users that provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus.
World Book is a leading publisher of nonfiction and mixed-genre children's book series, reference materials, and digital learning platforms. Education is World Book’s commitment and its editorial team is World Book’s strength. Each team member is dedicated to producing accurate and unbiased information by utilizing contemporary technological tools and following traditional practices of editorial excellence. For more than 100 years, World Book has promoted learning for the entire family through a range of products in which complex topics are concisely explained and vividly illustrated. An explicit goal is to help increase both reading fluency and comprehension in young readers. Encyclopedic content is updated continually and accessible 24/7 on a variety of devices. Innovative and readable, World Book will remain a trusted and useful resource at home, in the library, and in the classroom for years to come.
Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.由私人机构大英百科全书出版社所出版的英语百科全书，被认为是当今世界上最知名、最具权威的百科全书，是英语世界俗称的ABC百科全书之一。
