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
Online encyclopedia been published. Meanwhile, in the face of competition from rivals such as Encarta, the latest "Britannica" was digitized by its publishers, and sold first as a CD-ROM and later as an online service.# In 2001, ASCII text of all 28 volumes was published on "Encyclopædia Britannica" Eleventh Edition by source; a copyright claim was added to the materials included. The website no longer exists. Other digitization projects have made progress in other titles. One example is "Easton's Bible Dictionary (1897)" digitized by the Christian Classics Ethereal Library. A successful digitization of an encyclopedia was the Bartleby Project's online adaptation of