Windows 32bit Family XP RTM - 5.1.2600
XP SP1a - 1106
XP SP2 - 2180
Server 2003 RTM - 5.2.3790
Server 2003 SP1 - 1830
Server 2003 SP2 - 3959
Vista RTM - 6000.16386
Server 2008 Beta 3 - 6001.16510
Windows 64bit Family XP 64bit RTM - 5.2.3790.1830
XP 64bit SP2 - 3959
Server 2003 64bit RTM - 5.2.3790.1830
Server 2003 64bit SP2 - 3959
Vista 64bit RTM - 6000.16386
Server 2008 64bit Beta 3 - 6001.16510
Windows 7 arrived two weeks ago and so far it's selling quite sell. With Mac OS X 10.6 becoming available less than three months ago, and Ubuntu 9.10 arriving last week, we feel it's a good time to start watching the market share for operating systems, in addition to our monthly posts on browser market share. At this point in time, Windows continues to dominate with more than 90 percent of the market, Mac OS is above the five percent mark, and Linux is just under one percent. In October, Windows was the only operating system not to show positive growth.