Steve Jobs, chief executive officer of Apple Inc., right, greets members of the audience with his wife Laurene Powell Jobs after unveiling the iCloud storage system at the Apple Worldwide Developers Conference 2011 in San Francisco, California, U.S., on Monday, June 6, 2011. Apple is using iCloud to retain its dominance in the smartphone and tablet markets amid fresh competition from devices powered by Google Inc.'s Android software. Photographer: David Paul Morris/Bloomberg via Getty Images