Abstract William E. Boeing, Sr. (1881-1956) was an aviation pioneer and founded The Boeing Company in 1916. The collection holds textual materials, such as correspondence, philately, business-related materials, clippings, and ephemera, as well as photographs and illustrations related to his personal and business life, circa 1783-2008. Major areas of interest include family photographs and extensive personal and business-related correspondence.

Abstract The Paul A. Ludwig Military Aviation Photograph Collection contains 2382 photographic prints and negatives with a very small amount of textual materials collected by Paul A. Ludwig and ranging from the late 1910s through the early 1980s. The bulk and strength of the collection is photographs of World War II-era aircraft and squadrons. The collection is nearly all copy prints from a variety of institutions and dozens of private collections.