An anonymous reader writes "In May, Apple surpassed Microsoft in market capitalization to become the second largest company (by that measure) in the world. Today, with its shares riding high, Apple passed $300 billion in market cap, entering a club of two along with the still-gigantic ExxonMobile. And investors' targets could bring Apple beyond where Exxon is now (though Exxon continues to soar as well). Perhaps Wall Street is catching on that, despite the discontinuation of their underused Xserve, Apple is in fact becoming one of the key tech providers to enterprise, a position that even a year ago seemed laughable. If you consider the iPad to be a PC (which enterprise increasingly is), then suddenly you realize that Apple is expected to climb to 12% market share in 2011. Plus, of course, they have those little things called iPods, and iTunes..."