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.

This series contains the personal materials of Otto Duke, including personal research and reading, political papers and diagrams, personal photos, sheets from a pocket notebook, invitations, business cards, name tags, travel information, newspapers (Utah, Alaska, Oklahoma), pamphlets, and miscellaneous other materials. They are dated from 1920 to 1975.

This series includes papers regarding Otto Duke's involvement with the Church of Jesus Christ of Latter-day Saints, such as talks, projects, Park Stake SLC stake missionary work, 10th Ward papers, pamphlets, booklets, and church news and literature. Also includes some articles and pamphlets about the Reorganized Church of Jesus Christ of Latter-day Saints. The bulk of the material comes from 1930 to 1946 and some from 1920 to 1975.

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.

Includes diagrams and materials dealing with projects for the F. C. Torkelson Co., such as expense records, operating costs, Bailey Meter Co., limestone crushing plant, electric mine hoists, Kennecott Mill reports, Ferron Canyon Coal job, Hayden Smelter (Arizona), Smelter emissions control, and more from 1946-1975.

Includes diagrams and materials dealing with projects for the US Naval Supply Depot in Clearfield, UT, such as a dispensary project, marine barracks project, heating studies, correspondence, specifications, concrete tanks, "The Seagull" (three 1945 issues), and more. Dated 1942 to 1945.

Maps, diagrams, blueprints, and other engineering materials dealing with various companies, including USS Lead Refinery, Inc, Combined Metals Reduction Company, Kennecott Copper Corp., Utah Power and Light Company, American Zinc, Lead, and Smelting Co., Denver Equipment Co., Climax Molybdenum Co., Great Western Engineers, Inc., Allison Steel Manufacturing Company, American Smelting and Refining Company, Link-Belt Company, M. H. Detrick Co., and others. Dated 1917 to 1973.