The K. O. Knudson Photographs (approximately 1920-1969) depict the Las Vegas Grammar School and service, fraternal, and veterans organizations gathered by retired Las Vegas, Nevada school administrator and World War I veteran K. O. Knudson (also known as K. Oscar Knudson). The collection includes images of Knudson, Las Vegas Masonic Lodge members, American Legion members, and school dances. The photographs primarily feature Las Vegas, Nevada.

The Nevada Test Site Oral History Project Records (approximately 1950-2008) consist of oral histories collected by University of Nevada, Las Vegas Department of History for the Nevada Test Site Oral History Project. The collection includes digital audio recordings of interviews, print and digital transcripts, and a small selection of digital video recordings. Some interviews have also been supplemented with photographs, letters, scientific articles, brochures, news clippings and ephemera about the Nevada Test Site.

The Culinary Workers Union Local 226 Las Vegas, Nevada Photographs document various activities of the Culinary Union, from the 1950s to 2006, with the bulk of the material documenting the 1990s. Prominently featured in the collection are various strikes, pickets, marches, parades, rallies, and demonstrations from the late 1980s to early 2000s. A large portion of these photographs documents the Frontier Strike of the 1990s. Also included are photographs of press conferences, political rallies, internal committee meetings, Hotel Employees and Restaurant Employees (H.E.R.E.) conventions, and various social events. Materials contain photographic prints, photographic negatives, and a small number of slides.