Much of the advance debate devoted to the Apple conference that begins on Monday in San Francisco has concerned the features and pricing of forthcoming iPhone models.
It was the sleek design and intuitive user interface of the iPhone that vaulted Apple from nowhere into a leading position in the smartphone market.
But Apple has held on to that position because of the tens of thousands of applications for the handset available through Apple's year-old online store, which Nokia, BlackBerry maker Research in Motion and, most recently, Palm have been unable to match.
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