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.

Abraham Lincoln Brearcliffe, Jr. (1899-1984) was born in Washington state and worked for Boeing from 1930-1945. The collection features photographs, clippings and newsletters, foreman's materials, labor union membership books, and assorted ephemera from Brearcliffe's time at Boeing, most of which are almost exclusively from the war years (1941-1945).

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 John Fornasero Papers are comprised of documents, photographs, newspaper clippings, and ephemera pertaining to the life and work of flight instructor, aviation inspector, and test pilot John B. Fornasero. A significant portion of this collection is made up of photographs. Major topics include the Ryan School of Aeronautics, the Civil Aeronautics Administration, Fairchild Aircraft Company, and Boeing Aircraft Company.

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.