Microsoft Corporation (NASDAQ: MSFT) is putting the final touches on Windows 7, and by all accounts it will be Microsoft's best operating system product in nearly a decade when it's released. But that's not the only cash cow the software giant has -- its Office franchise is hugely profitable as well. Could that piece of its business ever be in jeopardy, though?The OpenOffice.org full software productivity suite is, in an odd way, Microsoft Office's largest competitor. Largest in that it's unknown in almost every corporate circle I've seen, and significant in that it provides -- for free -- almost everything the costly Microsoft Office does.
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