Encyclopædia Britannica it is scarcely used, and reviewers have recommended that it be dropped from the encyclopaedia. The also has color transparencies of human anatomy and several appendices listing the staff members, advisors, and contributors to all three parts of the Britannica. Taken together, the and comprise roughly 40 million words and 24,000 images. The two-volume index has 2,350 pages, listing the 228,274 topics covered in the "Britannica", together with 474,675 subentries under those topics. The "Britannica" generally prefers British spelling over American; for example, it uses "colour" (not "color"), "centre" (not "center"), and "encyclopaedia" (not "encyclopedia"). However, there are exceptions to
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