Archival Management Software by Lisa Spiro, Director of the Digital Media Center at Rice University. With generous support from The Andrew W. Mellon Foundation, the Council on Library and Information Resources has launched a multiyear program that addresses the challenge of cataloging hidden collections—those materials held in special collections, archives, and other restricted or relatively inaccessible settings. The program has two major dimensions: first, to identify hidden collections of potential value to scholars; and second, to address the thorny issue of cataloging such materials efficiently, effectively, and in such a way that the catalog records are available to scholars through the Web. In this paper, Lisa Spiro describes and analyzes some of the major technologies that are available to librarians, curators, and archivists and the implications of deploying these systems for existing workflows.