An "all keywords" search includes subject headings in NIDS and NUCMC as well as the text in the "description" field.
For example, the CD-ROM version offers three kinds of searches, accessible by clicking on file-folder-like tabs: collections, repository directory, and NIDS or NUCMC number.
Collections that are described both in NIDS and NUCMC
use a single record that contains information for each.
The NUCMC records in ArchivesUSA incorporate Library of Congress (LC) print editions from 1959-1993 and collections published on magnetic tape from 1993 through December 31, 1995.
Burke, University of Maryland, said, "The triumvirate of DAMRUS, NUCMC, and NIDS in ArchivesUSA provides a fascinating new tool that will solve the problem that researchers have had in using three different tools to search on documentary collections.