The S. Reid Warren papers primarily document his professional career in the field of electrical engineering and radiological physics, and in particular his role as an educator.

Dr. Warren's vocation at the University of Pennsylvania represents the bulk of the collection. Though the correspondence series contains a number of files between him and University officials such as Gaylord Harnwell, Martin Meyerson, and Joseph Bordogna, it is the professional papers series which provide the greatest insight to Warren's work at Penn. The professional papers contain letters, announcements, and notes as well as a large number committee related material, 1948-1979. Warren was involved in many causes and committees some of which are reflected in this collection and include: the Education Committee of Episcopal Academy, the American Institute for Electrical Engineers, the Institute of Electrical and Electronic Engineers, and the International Electrotechnical Commission. There are lecture notes, n.d.; and class reunion files, 1979-1988; speeches, 1950-1980; and manuscripts and articles, 1930-1986. Documentation on Warren's research work in the field of engineering is limited. There are files relative to the development of the ENIAC and EDVAC, 1969-1984.