DDC22: Revised and updated to reflect today's world
The new four-volume print version comprises the entire, updated Dewey Decimal Classification system. Last published in 1996, the new edition covers global changes in areas of computer science, medicine, geography, politics, lifestyle trends and more - all carefully incorporated to make classification and access easier than ever. You will appreciate enhancements that improve usability.

Classify anything that's new
Updates to the new edition include emerging topics, geographic revisions, scientific advances, growing interests and just about anything else that's new. The Relative Index has been updated with the latest built numbers and terms.

Refined for easier access
Dewey has kept pace with the way you work. While the print version remains as popular as ever, many libraries want both a print and online version. The print version is a ready resource for librarians who prefer using hard copy, while WebDewey offers all of the advantages of online information access, plus regular updates throughout the year.