From 1967 to 1972, the Saturn V, the largest rocket built at the time of the first missions to the Moon, carried the 45-ton Apollo spacecraft on Earth orbital and lunar missions. On May 14, 1973, it also launched the 120-ton Skylab into Earth orbit. Its design and fabrication were carried out by a government and industry team that included the National Aeronautics and Space Administration, the Boeing Company, North American Rockwell, McDonnell Douglas Corporation, International Business Machines, and their subcontractors, and many of its design features grew out of earlier development work by military service organizations and their contractors.