The Allen D. Cardwell Manufacturing Corporation was a major producer of radio and telecommunications equipment during the twentieth century. Cardwell sold its products to the United States Government, major corporations, and individual consumers. The records contain technical information such as patents and design drawings, as well as a vast array of sales and promotional material from the 1920s.

Bell Telephone Company was a telecommunications company that led the Bell System of telephone services throughout North America between 1877 and 1983. This small collection of photographs documents the company's line-laying equipment and process; several images show workers driving tractors, digging trenches, and laying telephone lines. These images would be of interest to scholars of the history of technology and early telecommunications.

Charles Jennings (1916-2006) served for more than forty years as RCA Global Communications’ primary liaison in Japan, figuring prominently in the development of post-World War II Japanese communications systems. The collection consists primarily of black and white and color photographs, albums, advertising posters, papers, and unbound scrapbook boards of photographs and ephemera. The images predominantly relate to Jennings’ business and personal life during his time in Japan, addressing the themes of Japanese and trans-Pacific telecommunications activities, particularly relating to RCA; postwar Japanese-American business and informal diplomatic relations; and life in postwar Tokyo.

Isaac "Ike" Aaronson (1875-1962) was a division construction superintendent for the Bronx Division of the Bell Telephone Company. In this role, he supervised the relocation and splicing of cables in subways, rapid transit, and across bridges. Bell Telephone Company was a telecommunications company that led the Bell System of telephone services throughout North America between 1877 and 1983. This scrapbook primarily focuses on Aaronson's Testimonial Dinner, which was held on April 7, 1938, after he retired from the company after forty-five years. The contents include magazine and newspaper clippings about Aaronson's career and the Testimonial Dinner, telegrams and correspondence sending regrets for being unable to attend the dinner and felicitations on his retirement, a dinner menu, and event photographs. The remainder of the album consists of materials documenting Aaronson's career at the telephone company.