The RKO Radio Pictures, Incorporated series (1930-1974) contains material primarily pertaining to development of RKO films during Hughes' ownership of the company. This series primarily features The Conqueror (1956) and Jet Pilot (1957), but also includes material for other films such as His Kind of Woman (1951), and Son of Sinbad (1955). Records include film set and publicity photographs, film advertising and news articles, screenplays, ledgers, and music scores. Corporate materials contain newspaper clippings, copyright documents, administrative correspondence, actor contracts and agreements, and stock information. Also included are scripts, screenplays, and manuscripts collected to draft potential film adaptations. Ledgers contain theatrical screening reports and corporate budgets. Other materials include reports pertaining to the Cold War and film industry blacklisting.

The Robert H. Crabtree papers (1920-1999) sub-series contains an extensive account of Crabtree's career as a professor and archaeologist. Materials includes correspondence, photographic prints and negatives, reports, and notes of archeological surveys and excavations done in Southern California, Southern Nevada, Washington, Oregon, and Mexico. Collection includes resources such as field catalogs, proposals, newsletters, annual reports, workflow documentation, conference materials, and meeting minutes from various archaeological and anthropological societies and organizations. The subseries also includes class notes, dissertation drafts, and manuscripts used by Crabtree during his academic career. Digital files include field notes and reports.