Analyst IDC just released its latest survey of operating system sales and market share. In obvious news, Microsoft Windows continues to dominate the desktop. Microsoft has also made huge gains on the server side. The survey does not account for free Linux installs, only paid versions, so the Windows vs. Linux sales figures are only useful to see who’s making more money, however. Both Windows and Linux on the server side are growing at the expense of commercial Unix and older OSes like OS/2 that are being phased out.