Opening History (OH) – U.S. History Resources from Libraries, Museums, and Archives
http://imlsdcc.grainger.uiuc.edu/history/

Opening History (OH) contains metadata describing digital collections specializing in United States history and culture and item-level metadata describing resources contained within these collections. As of May, 2009, the portal contains 553 collection records and over 918,000 item records. Opening History’s mission is to provide organized access to digital resources of value for research on United States history and culture. OH aggregates a range of distributed and complementary cultural heritage collections from libraries, museums, and archives to increase their visibility and to enhance the value and usefulness of individual collections by integrating them with related collections, providing search and browse functions across collections, and linking to related resources outside of OH. The OH initiative encourages sharing of digital resources in open access formats and promotes coordinated access to regional, state, and local collections to support the creation of a digital cultural heritage aggregation of national scope. This will be added to Data Mining Resources Subject Tracer™. This has been added to Research Resources Subject Tracer™ Information Blog.