A studio system is a method of filmmaking wherein the production and distribution of films is dominated by a small number of large movie studios. It is most often used in reference to Hollywood motion picture studios during the early years of the Golden Age of Hollywood from 1927 to 1948, wherein studios produced films primarily on their own filmmaking lots with creative personnel under often long-term contract, and dominated exhibition through vertical integration, i.e., the ownership or effective control of distributors and exhibition, guaranteeing additional sales of films through manipulative booking techniques such as block booking.