Julius A. Barr (1905-1939) was born in Normal, Illinois and spent time as a personal pilot to Chinese military figures in the mid-1930s as well as worked as a Boeing test pilot from 1938-1939. The collection contains four clippings related to Barr's time at Boeing and his death.

The Boeing Company Posters Collection is an artificial collection comprised of visual materials produced by The Boeing Company that showcase its aircraft, corporate history, facilities, and other subjects related to the company, ranging from approximately 1930s-2010s.

The William Hough “Bill” Cook, Jr. Papers are comprised of documents, photographs, newspaper clippings, and memorabilia pertaining to the life and work of Bill Cook, Jr. A significant portion of this collection is made up of correspondence, both personal and professional. Major topics include the Boeing high speed wind tunnel, the B-29, B-47, and B-17 bombers, the development of the YC-14 short takeoff and landing (STOL) aircraft, and research on supersonic transport.

The Lloyd E. Frisbee Aeronautical Engineering Collection documents the career of aeronautical engineer Lloyd E. Frisbee. The collection dates from 1938 to 2012 and chronicles Frisbee's career achievements as an engineer starting with the Boeing Company, followed by Northrop Corporation, and lastly his time with the Lockheed Company. The materials emphasize his work on the Lockheed L-1011 Tristar aircraft.

The Tandy C. Hennings Collection of E. Scott Osler Materials are comprised of photographs, newspaper clippings, and correspondence collected by Hennings concerning commercial pilot, flight engineer, and test pilot E. Scott Osler. Also included is the biography of Osler that Hennings wrote using these materials.

The Edward Scott Osler Logbooks and Photographs are comprised of logbooks and photographs pertaining to the work of commercial pilot, flight engineer, and test pilot Edward Scott Osler. This collection is primarily logbooks.