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.

KEMET Electronics Corporation specializes in passive electronic components, including getters (an essential element in vacuum tubes) and capacitors. The name "KEMET" was derived from the words "chemical" and "metallurgy." This small collection consists of employee newsletters and ephemeral publications from KEMET Electronics dating from the 1970s through the 2000s, with some related materials, including a small group of annual reports from Union Carbide from the 1950s.