The Harold Fletcher Mathis Papers contain biographical materials, news clippings, offprints, journal issues with articles by Mathis, and reports relating to Mathis' research on topics including electric power systems and transmission lines.

The Frank C. Caldwell Papers contain correspondence, articles, published and unpublished manuscripts, alumni materials from Cornell, materials on the Army Signal Corps, tracings for wiring motors, Prague lectures and letters, OSU Electrical Engineering class of 1929 photographs, broadcasts, reports, Edward Orton commemoration materials and university committee files.