The Harrah’s Entertainment Corporate Archives (dating from 1811 to 2004 with the bulk of the materials dating from 1940 to 2000) contain the promotional and corporate files of Harrah’s Entertainment Inc. and its predecessors, as well as Bill Harrah’s personal papers and card game collection. The materials were compiled and developed as a corporate archive by Harrah's Entertainment, Inc.’s Corporate Communications Department. The collection is primarily comprised of casino and employee periodicals, reports, manuals, promotional files, ephemera, and newspaper articles that document Bill Harrah’s casinos in Reno, Nevada and Lake Tahoe as well as Harrah’s Inc., Holiday Inns, Inc., Holiday Corporation, the Promus Companies, and Harrah’s Entertainment, Inc. Also included are photographs that document the construction of Harrah’s properties, business operations, the people who worked and performed at Harrah’s properties, and Bill Harrah’s automobile collection. The collection also contains Bill Harrah’s collection of playing cards and card games. Also included are photographs of the Harrah family.

The Harrah’s Entertainment, Inc. Photograph Collection contains black-and-white and color photographic prints, negatives, postcards, and slides of William "Bill" Harrah at events in Nevada between approximately 1930 and 1991. Also included are views of Harrah’s Nevada properties including Harrah’s Lake Tahoe Hotel and Casino, Harrah’s Reno Hotel and Casino, and the Holiday Inn Hotel and Casino (that later became Harrah’s Las Vegas Hotel and Casino).

Oral history interviews with Mando Rueda conducted by David Schwartz on September 02, 2003, September 04, 2003, September 09, 2003, September 12, 2003, September 25, 2003, October 02, 2003, October 09, 2003, October 23, 2003, and November 20, 2003 for the UNLV University Libraries Oral History Collection. In these interviews, Rueda discusses his career in the gaming industry. He talks about serving in the United States military during the 1950s and becoming a slot machine repair manager for Harrah’s properties in Reno, Nevada and in Lake Tahoe, Nevada. Rueda recalls his relationship with Bill Harrah, being promoted to shift manager in 1970, and the methods of surveillance used before security cameras. Later, Rueda discusses the impact on casino operations after the passing of Bill Harrah in 1978, and becoming director of gaming. He remembers obtaining a gaming license to operate in New Jersey, and the opening of Harrah’s Marina in Atlantic City. Lastly, Rueda talks about the gaming industry in Las Vegas, Nevada and compares casino operations from the 1970s to the late 1990s.