These varied collections document the history of Los Angeles and southern California. "Digital Archives" offer more than 126,000 photographs, maps, manuscripts, texts, and sound recordings in addition to exhibits. Nearly 1,200 images of artifacts from early Chinese American settlements in Los Angeles and Santa Barbara are available, as is the entire run of El Clamor Publico, the city's main Spanish-language newspaper from the 1850s. Photographs document Japanese American relocation during World War II and photographs, documents, and oral history audio files record Korean-American history. The archive also includes Works Projects Administration Land Use survey maps and Auto Club materials. A related exhibit, "Los Angeles: Past, Present, and Future", offers collections on additional topics, including discovery and settlement, California missions, electric power, "murders, crimes, and scandals," city neighborhoods, cemeteries, Disneyland, African American gangs, and the Red Car lines.

A memorial to Roland Marchand, the late historian of popular culture and advertising, this website presents a slide library with more than 6,100 images, including more than 2,000 advertisements, drawn from Marchand's collection. The images are organized into more than 40 major categories and close to 200 subcategories.

The site also offers 48 lesson plans designed by Marchand, each with an introduction, an essay assignment, and 10 to 40 primary source documents. The lessons cover a diverse range of controversial topics, including the Antinomian Controversy, the reactions against Chinese immigrants, the Pullman Strike, the Women's Suffrage Movement, and Watergate. The site will be useful for researching popular culture and advertising, as well as numerous other topics in American history, such as women, wars, immigration, labor, and African Americans.