Airbus intended the A330 to compete directly in the ETOPS (Extended-range Twin-engine Operation Performance Standards) market, specifically with the Boeing 767. The A330 was launched in 1987; airlines purchased it to replace the McDonnell Douglas DC-10. The A330 is 38% more fuel efficient than the DC-10. By the end of July 2008, a total of 1,006 A330s had been ordered and 555 delivered. The 1,000 milestone was passed with orders from the 2008 Farnborough Air Show.