Abstract James D. Griffin was an engineer for McDonnell Douglas Corporation. The collection contains five hundred and ninety-six (596) photographs, likely collected and notated by Griffin, featuring primarily Douglas Aircraft Company airplanes manufactured during the 1910s-1970s but also, to a lesser extent, other manufacturer models; including Aero Spacelines, Boeing, Consolidated, and Northrop. There is also a small amount of clippings, newsletters, and articles.

Abstract Harold W. Zipp was an engineer at the Boeing Company for forty years. The collection documents his career, particularly his tenure in Wichita, Kansas, with diaries, photographs and other documents.