Charles A. Rosencrans (1908-1991) was an RCA engineer who specialized in radio transmission. His notebooks largely consist of fragmentary handwritten notes from both his career at RCA and from his studies in electrical and mechanical engineering at Lehigh University.

Ralph Pedi (1906-1992) was an Italian tenor soloist and recording artist. For more than fifty years, the Radio Corporation of America (RCA) was one of the country's leading manufacturers and vendors of radios, phonographs, televisions, and a wide array of consumer and military electronics products. This item is a recording contract between Pedi and RCA Manufacturing Co. for six recorded selections.