This item is a map of Delaware Park racetrack area showing property boundaries. Parking areas are identified. Buildings are numerically coded, but there is no corresponding key. William duPont, Jr. and Donald P. Ross designed and built Delaware Park Racetrack. Phillip T. Harris of Media, Pennsylvania was hired as the architectural engineer. The facility opened on June 26, 1937. Although the park closed briefly during the 1980s, over the years, it has expanded to include a full-service casino and other amenities

Harry Lobe Straus (1896-1949) was an early computer engineer and developer of totalisator or "tote board," an electronic system that printed and issued betting tickets at racetracks, automatically computed the bets and odds, and displayed them on a large board. This collection is a small group of papers preserved by his personal secretary, Christine Behm Nunus (1906-1998). It includes financial statements, business letters, estate papers, and items relating to Straus's biography, "Win. Place. Show."

John McShain (1898-1989) was a Philadelphia and Washington, D.C.-based building contractor, whose firm, John McShain, Inc., was by 1950 the fifth largest construction firm in the United States. The collection contains graphic materials documenting John McShain's family life and personal interests, his career as a building contractor, and his involvement in horse racing.