Donald W. Thomson worked for Pan American World Airways from 1932 to 1976 when he retired as the company's treasurer.  His papers include corporate records, memoranda, reports, memorabilia and photographs.  Bound volumes of annual reports and books were separated from the collection for cataloging.

Clipper Pioneers is an organization of former Pan Am pilots and flight crew. This collection includes Pan Am records such as memoranda, flight manuals, and accident reports as well as clippings, log books, pilot files, scrapbooks and photographs.