History of the Encyclopædia Britannica the criteria by which the articles were sorted were not obvious even to scholars, despite Dr. Adler's claims that the sorting followed naturally from the "Propædia's" outline of all knowledge. In 1985, the "Britannica" responded to reader requests by restoring the index as a two-volume set. The number of topics indexed by the "Britannica" has fluctuated from 500,000 (1985, the same as in 1954) to 400,000 (1989,1991) to 700,000 in the current 2007 print version. Presumably, this recent increase reflects the introduction of efficient electronic indexing, since the size of the encyclopedia has remained nearly constant at approximately 40 million
Compton's Encyclopedia "The New Grolier Electronic Encyclopedia" (1988–1991), still pictures were added. Variants of Compton's CD-ROM encyclopedias were "Compton's Concise Encyclopedia", "Compton's Family Encyclopedia", and "Compton's Interactive Encyclopedia". Compton's Encyclopedia Compton's Encyclopedia and Fact-Index is a home and school encyclopedia first published in 1922 as Compton's Pictured Encyclopedia. The word "Pictured" was removed from the title with the 1968 edition. The encyclopedia is now advertised as "Compton's by Britannica". "Compton's Multimedia Encyclopedia" CD-ROM (1989) was the first multimedia encyclopedia. Grolier's earlier CD-ROM encyclopedia was not multimedia. The encyclopedia was founded by Frank E. Compton in 1922. Publishing rights to the F.E. Compton