The series includes papers from Otto Duke's time as both a student and a teacher from 1919 to 1945, mainly at the University of Utah dealing with mechanical engineering, such as notebooks, coursework, school newspapers, and reports on topics such as steam turbines, mechanics, materials, roasters, and others.

Otto Duke was secretary-treasurer of the Intermountain Alumni Association of the Theta Tau fraternity. This series deals with that association and includes correspondence, monthly luncheon attendance, "The Gear of Theta Tau," receipts, 40th anniversary meeting planning, "Balfour Blue Book," and minutes of biennial Theta Tau conventions. Dates range from 1955 to 1969.