The collection, 1949 to 2006, was compiled by Clifford Olsen, a containment physicist at the Nevada Test Site (NTS). It consists of research notes and working papers written by Olsen and other scientists, publications, epoxy aggregate samples, work-related correspondence, nuclear-test-event data, and interviews conducted by Olsen with work colleagues involved with the NTS.

The Desert Fishes Council Records (1969-1988) consist of resolutions, meeting minutes, symposium programs, agendas, and press releases of the Desert Fishes Council (DFC). The organization is devoted to the study and preservation of Southwestern desert fishes, notably the desert pupfish. The DFC records reflect efforts to bring the plight of desert fishes to the attention of academics and the public as well as highlight the worth of desert lands within the American environmental movement.

The collection documents Gilbert Shwartz's early involvement with the Clark County Sheriff's Mounted Posse and the Elks Club in the early 1960s as well as the growth of his real estate company, Sahara Realty, from 1963 to 2008. The collection includes photographs and programs of the Clark County Sheriff's Mounted Posse Rodeo and programs for the Elks Club Helldorado Days Rodeo from the early 1960s. The collection also includes photographs of Schwartz and his home, slides of Sahara Realty/Realtors advertising around Las Vegas, and autographed team photographs of the Central Little League teams sponsored by Sahara Realty. Also included is a program for the National Association of Real Estate Brokers annual conference held in Las Vegas in 1974.

The Grace Hayes Papers (1900-1989) include personal papers and financial papers pertaining to the Grace Hayes Lodge (formerly the Red Rooster), a nightclub on the Strip in Las Vegas, Nevada. The collection includes financial documents, newspaper clippings about Hayes and her family, personal correspondence, career mementos, legal documents, and photograph albums.

The Beda and C. Norman Cornwall Photograph Collection (1940s-1978) primarily contains black-and-white photographic prints of Beda and C. Norman engaging in various civic activities. The collection also includes photographic prints of Beda Cornwall’s reception at the University of Nevada, Las Vegas, as well as C. Norman Cornwall’s riding group, the Los Rancheros Visitadores, during their trek through the Santa Ynez Valley in California. Beda Cornwall was the president of the Citizens’ Library Association of Las Vegas and C. Norman Cornwall was a prominent Las Vegas attorney.

The International Food Service Executives Association (IFSEA) Photograph Collection is comprised of panoramas, stills, and posed photographs of IFSEA members from 1914 to 1965.

The Leslie H. Smith Papers (approximately 1920-2018) contains the personal papers of Leslie H. Smith, who grew up in Las Vegas, Nevada, and mainly documents his involvement with the Las Vegas High School Alumni Association organizing and attending the school's annual reunions. The collection includes personal papers, scrapbooks, and photographs documenting Smith's family, including his father Dr. J. D. Smith, his mother Ruth Weir Smith, and his sister Jeanne Smith Stewart. Reproductions of class photographs from the Las Vegas Grammar School (now known as the Historic Fifth Street School) where Smith attended elementary school are also included this collection.