"According to a survey released June 1 by Microsoft Certified Partner Port80 Software, 53.8% of all Fortune 1000 company Web sites are powered by Windows and Microsoft's IIS servers, while only 21.2% of these giant companies use Apache and other open source software to run their corporate Web presences. This means these companies offer a huge potential market for FOSS (Free and Open Source Software) vendors and service providers.
"Port80 should be commended for reminding us that FOSS is not yet dominant; that there are plenty of companies, including some of the world's largest ones that still haven't converted from expensive, proprietary server operating systems and applications to low-cost, reliable FOSS solutions..."