from Khan. Graham and Khan lobbied SOM partners to purchase a mainframe computer, a risky investment at a time, when new technologies were just starting to form. The partners agreed, and Khan began programming the system to calculate structural engineering equations, and later, to develop architectural drawings. Professional milestones List of buildings Buildings on which Khan was structural engineer include: McMath–Pierce solar telescope, Kitt Peak National Observatory, Arizona, 1962 DeWitt-Chestnut Apartments, Chicago, 1963 Brunswick Building, Chicago, 1965 John Hancock Center, Chicago, 1965–1969 One Shell Square, New Orleans, Louisiana, 1972 140 William Street (formerly BHP House), Melbourne, 1972 Sears Tower, renamed Willis Tower, Chicago, 1970–1973 First Wisconsin Center, renamed U.S. Bank Center, Milwaukee, 1973 Hajj Terminal, King Abdulaziz International Airport, Jeddah, 1974–1980 King Abdulaziz University, Jeddah, 1977–1978 Hubert H. Humphrey Metrodome, Minneapolis, Minnesota, 1982 One Magnificent Mile, Chicago, completed 1983 Onterie Center, Chicago, completed 1986 United States Air Force Academy, Colorado Springs, Colorado Awards and chair Among Khan's other accomplishments, he received the Wason Medal (1971) and Alfred Lindau Award (1973) from the American Concrete Institute (ACI); the Thomas Middlebrooks Award (1972) and the Ernest Howard Award (1977) from ASCE; the Kimbrough Medal (1973) from the American Institute of Steel Construction; the Oscar Faber medal (1973) from the Institution of Structural Engineers, London; the International Award of Merit in Structural Engineering (1983) from the International Association for Bridge and Structural Engineering IABSE; the AIA Institute Honor for Distinguished Achievement (1983) from the American Institute of Architects; and the John Parmer Award (1987) from Structural Engineers Association of Illinois and Illinois Engineering Hall of Fame from Illinois Engineering Council (2006). Khan was cited five times by Engineering News-Record as among those who served the best interests of the construction industry, and in 1972 he was honored with ENR Man of the Year award. In 1973 he was elected to the National Academy of Engineering. He received honorary doctorates from Northwestern University, Lehigh University, and the Swiss Federal Institute of Technology Zürich (ETH Zurich). The Council on Tall Buildings and Urban Habitat named one of their CTBUH Skyscraper Awards the Fazlur Khan Lifetime Achievement Medal after him, and other awards have been established in his honor, along with a chair at Lehigh University. Promoting educational activities and research, the Fazlur Rahman Khan Endowed Chair of Structural Engineering and Architecture honors Khan's legacy of engineering advancement and architectural sensibility. Dan Frangopol is the first