Chadwyck-Healey's automated combination of traditional manuscripts finding aids, including The National Union Catalog of Manuscript Collections (but not including RLIN's AMC file; for that, request Reference assistance), this search tool indexes the holdings of more than 4,400 American repositories, amounting to some 100,000 collections. It is restricted to UI searchers, one at a time. A UI searcher may be bumped off after 15 minutes if another UI searcher begins a search. UI possesses a CD-ROM version, use of which entails no such difficulties, but the information it contains is less up to date, and it is accessible from the UI Main Library only.