Nat Hart's professional papers are comprised of records, designs, and photographs relating to his career in the Las Vegas, Nevada and Atlantic City, New Jersey casino industry as a food and beverage executive from 1945 to 1996. The series contains documents from his employment with Caesars World, Desert Inn, and as a freelance consultant. Also included are architectural drawings and designs, records from the Nat Hart Cooking School, recipes, documents from professional groups, articles about the hospitality industry, and artifacts from his career.

The personal papers are comprised of documents, letters, and photographs of Nat Hart and his family. The series includes documents from both Nat and Sylvia Hart’s memberships in the Las Vegas Jewish service organization B’nai B’rith, and correspondence regarding the establishment of a scholarship in Nat Hart’s name at the University of Houston.