Arnold Cohen's papers focus on Research & Development. There is considerable information on the development of magnetic storage and ERA's contracts with the Office of Naval Research for the building of the Atlas Computer. There are also files describing the relationship between ERA and M.I.T.'s Servomechanism Laboratory, and the Lawrence Livermore Radiation Laboratory. The latter describe the LARC computer project. Records documenting the 1947 symposium at Harvard University on “Large Scale Digital Calculating Machinery” describe early efforts to develop airline reservation systems and to automate procedures at Prudential Insurance Company.