The Howard Hughes Public Relations Photograph Collection depicts the activities of businessman Howard Hughes from 1930 to 1950. The photographs primarily depict aircraft flown by Hughes or designed by the Hughes Aircraft Company, including the XF-11 reconnaissance plane, the HK-1 Hercules (or "Spruce Goose"), and the Hughes H-1 Racer. The photographs also depict celebrations following Hughes's circumnavigation flight in New York City, New York and Chicago, Illinois in 1938. Lastly, the photographs include Hughes testifying in front of the Senate Special Committee to Investigate the National Defense Program in 1947.

The Gary W. Royer Collection on Gaming (dating from 1950 to 2009, with the bulk of the materials dating from 1970 to 1995) contains research files, legal files, reports, and manuals about gaming written and collected by Gary W. Royer. The collection includes research and regulatory files collected by Royer while he worked at the Nevada Gaming Control Board. These files primarily document the legislation and regulation of gaming in Nevada, but include information on other states in the US and some international locations. Regulatory files include statutes, codes, regulations, revenue reports, Nevada Gaming Control Board and Nevada Gaming Commission meeting minutes, and tribal-state gaming compacts. Also included are research files about casino, racetrack, and sports betting facilities that include data on organizations, monthly revenue reports, occupancy rates, management and operational control manuals, annual reports, policy and procedure manuals, and profile sheets collected for consulting purposes in Royer’s role as President of Casino Control Corporation (CCC), a private gaming consulting firm. Also included are subject and research files, vendor advertisements, catalogs, and reports; gaming industry publications; conference materials; audit guides; and a comprehensive collection of newspaper articles that document the US gaming industry in the second half of the twentieth century.