Conversely, FOSS pioneer Richard Stallman about 20 years ago implemented a
strict set of legally enforceable rules under which all open-source code writers would have to adhere. That is, free software could guarantee those freedoms denied by proprietary software as long as
contributors to the so-called "GNU" movement (read the article) assigned their copyrights to the Stallman-controlled Free Software Foundation. Everything that falls under those copyrights has to abide
by that organization's license.
Microsoft, meanwhile, has been urging Fortune 500 companies using Linux to enter into a pact that would protect them from a Microsoft patent suit. However, Stallman's lawyer Eben Moglen claims that because Microsoft is selling Linux coupons for Novell, its newest partner, the software giant is subject to FOSS rules--so its code has to be opened to the public. Since then, Moglen and co. also plugged the loophole that made the Novell deal possible, to deny any future Linux partnerships. Get ready for a long, long fight.