Abridged Dewey decimal classification and relative index

For libraries with collections of 20,000 titles or fewer, the abridged edition of the Dewey Decimal Classification (DDC) system provides the level of detail needed to classify the materials in those collections. Packaged in one convenient, affordable print volume, the abridged DDC provides Dewey numbers that are compatible with the unabridged edition should a library’s collection expand and require deeper classification detail. - Publisher.