The Dr. Howard Zellhoefer Collection of Artwork contains three paintings collected by Dr. Howard William Zellhoefer. Two paintings are by K. Nakamine of landscapes in Okinawa, Japan from 1949, and the third painting is a 1962 Ferdinand Burgdorffof a desert landscape, possibly Mojave Desert, California.

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.