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 encyclopedia titled "Compton's MultiMedia Encyclopedia" as early as 1989 (the first one being the "Academic American Encyclopedia" published by Grolier), but did not launch "Britannica CD" until 1994, a year after Microsoft launched their "Encarta" encyclopedia. McHenry believes these failures were due to a reluctance among senior management to fully embrace the new technology, caused largely by the overriding influence of the sales staff and management. The sales personnel earned commissions from door-to-door selling of the print encyclopedias, which McHenry believes led to decisions about the distribution and pricing of the electronic products being driven by the desires of the