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
History of the Encyclopædia Britannica focuses on material for children, which was much more profitable than its traditional encyclopedia. Used copies of the CD are available, but the online version of the Britannica as known up to 2012 is not available in 2018 from any vendor. In the 1980s Microsoft approached Britannica to collaborate on a CD-ROM encyclopedia, but the offer was declined. Senior managers at Britannica were confident in their control of the market and that their healthy profits would continue. At this time complete sets of the encyclopedia were priced between $1,500 and $2,200, and the product was considered part of a luxury