Enterprise Rent-A-Car is a United States company that specializes in car rentals. Enterprise Rent-A-Car was established in St. Louis, Missouri, in 1957 and is headquartered today in Clayton, Missouri, part of Greater St. Louis. Named after the aircraft carrier USS Enterprise, the vessel that the founder served on during WW2, Enterprise Rent-A-Car also offers used car sales, commercial fleet management and commercial truck rental operations. They were given the 21st spot on Forbes' list of the Largest Private Companies in America in 2008. The largest rental car company in America, Enterprise Rent-A-Car boasts over 5,400 locations and another 419 airport locations.