Propædia

thumb | right | alt=Encyclopaedia Britannica, 15th edition | Encyclopaedia Britannica, 15th edition The one-volume Propædia is the first of three parts of the 15th edition of Encyclopædia Britannica, intended as a compendium and topical organisation of the 12-volume Micropædia and the 17-volume Macropædia, which are organised alphabetically. Introduced in 1974 with the 15th edition, the Propædia and Micropædia were intended to replace the Index of the 14th edition; however, after widespread criticism, the Britannica restored the Index as a two-volume set in 1985. The core of the Propædia is its Outline of Knowledge, which seeks to provide a logical framework for all human knowledge. However, the Propædia also has several appendices listing the staff members, advisors and contributors to all three parts of the Britannica.

The last edition of the print Britannica was published in 2010.