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.

Creed and Company Limited was originally founded as Creed, Bille & Company Limited by Frederick George Creed (1871-1957) and Harald Bille (1879-1916) in 1912 to manufacture and sell telegraphy equipment. In the early 1900s, Creed had invented several machines that facilitated the sending and receiving of Morse code messages. Much of Creed and Company's manufacturing capacity was in Croydon, London, England. These photographs show a group tour of the Creed and Company Limited plant in Croydon on October 14, 1954.