In the third interview session, conducted on February 1, 2001, McArthur speaks further about working for the U.S. Steel Company and about his experiences in the U.S. Army during World War II, including studying Mandarin Chinese. He talks about his marriage to Joyce A. Clark. He then speaks at length about his career as an industrial designer for the Ray F. Becker Company, and talks about products the company produced, about the steel fabrication process, and about buildings the company worked on, particularly gas stations. He talks about how Oregon has changed during the 20th century, particularly regarding housing development, transportation, and power generation.