Inter-Play is a Web-based, multilingual index to plays published as part of collections, anthologies, or periodicals, and compiles many citations to plays not indexed by standard print indexes. Inter-Play contains about 16,130 bibliographic citations and spans in date from the late nineteenth century to the present. Although the index is multilingual, the search interface is in English. Users may search the index by author or title only. Inter-Play is updated frequently by its co-editors: Robert Westover and Janet Wright, humanities librarians at Portland State University.