When Steve Jobs cruises into the airy reception area on the Apple Computer campus in Cupertino, California, on a recent morning, nobody pays much attention to him, even though he’s the company’s CEO. He’s wearing shorts, a black T-shirt and running shoes. Tall and a little gawky, Jobs has a fast, loping walk, like a wolf in a hurry. These days Jobs seems eager to distance himself from his barefoot youth – who was that crazy kid who once called the computer “a bicycle for the mind”? – and driven to prove himself as a clear-thinking Silicon Valley capitalist. Jobs punches the elevator button to the fourth floor, where his small office is located. For a man who is as responsible as anyone for the wonder and chaos of Silicon Valley, Jobs’ view of it all is surprisingly modest: shrubby treetops extending out toward San Francisco Bay, the distant whoosh of the freeway below. There is nothing modest, however, about Apple’s recent accomplishments. In the past few months,...