The oral histories narratives mainly document life in the first half of the 20th century, though the 140 hours just uploaded include some interviews with jazz musicians, 1950s-1990s. The narrators range from suffragists, anarchists and communists to garment workers and oil workers, and include African American men and women, Issei and Nisei, Latinos/Latinas, and Eastern European immigrant women.

The site design affords the user several ways of locating material: by browsing the collections, series and tapes, or searching for interview segments that match a search criterion specified by the user. Full bibliographic citations are provided for each segment.