Producers Sales Organization (PSO; also known as PSO Productions, Inc.) was an independent motion picture production and sales company founded in 1977. Initiated by Mark Damon, an actor-turned-producer, PSO mostly handled foreign sales of independent films. It was initially a partnership between Damon, producer Sandy Howard, and Richard St. Johns, who worked for Arthur Guinness Son & Co. At one point, it was a subsidiary of Guinness. A year after PSO ended, Damon founded a new company, with Peter Guber and Jon Peters, called Vision International.