Physicist. Scientific papers, articles, and notes relating largely to Davisson's research on secondary emissions of electrons, electron optics, construction of instruments for electron focusing, and crystal physics while employed by Western Electric Company and Bell Telephone Laboratories, and also including lecture notes, personal correspondence, and photographs.

Physical chemists. Writings, speeches, correspondence, research data, subject files, photographs, notes, and miscellaneous textual materials in both physical and digital formats primarily relating to the Karles’ careers at the Naval Research Laboratory and their contributions to the field of crystallography.