E.I. du Pont de Nemours & Company is a chemical company. This item is a photomontage of five images, each image depicts a group of women working in a small telephone operator room.

James Gordon Ferguson (1900-1985) was an electrical engineer who worked at Bell Telephone Laboratories for forty-two years. He was the author of numerous technical papers and was one of the leads during the 1940s in developing the Number Five Crossbar Switching System (5XB switch), which brought telephone service to rural areas. This item is an unpublished memoir entitled "Me and My Bell System (As I Remember Us)," circa 1965. It details Ferguson's career and professional life.

The Richard M. Peterson papers are composed of specifications and schematics, reports, and correspondence related to Peterson’s work on various projects, such as an electronic ignition control, home information systems like Dimensia and SKIPPER, a touch-screen telephone, and an automated mail service for the United States Postal Service.

One of Peterson's lab notebooks (1979-1981) can be found in Record group 26.

The Telecommunications series contains images of equipment, components, parts, and details. The series is arranged into six subseries: Equipment, Facsimile equipment, Mobile, Speech, Telephones, and TELEX. The materials date from 1930 to 1977.