There are some broad differences between encyclopedias and dictionaries. Common examples are encyclopedias and textbooks. The lexicographic order has thus been introduced for sorting the entries of dictionaries and encyclopedias. The information contained in encyclopedias and textbooks are good examples of explicit knowledge. There was little original research, but many lexicons, anthologies, encyclopedias, and commentaries. Encyclopedia Americana is one of the largest general encyclopedias in American English language. The article compared Wikipedia's content to other popular online encyclopedias, namely Britannica and Encarta. A number of maps, encyclopedias, and other publications have switched to using both names. A series of art books, encyclopedias, comics, novelizations, and novels have been published. Wolfram Research publishes several free websites including the MathWorld and ScienceWorld encyclopedias. Neill graduated in 1912 and began to edit encyclopedias and similar reference books. Other collaborative online encyclopedias were attempted before Wikipedia, but none were as successful. The "Vite" formed a model for encyclopedias of artist biographies. Wikipedia was comparable to the other encyclopedias, topping the chemistry category. The largest online encyclopedias are general reference works.