According to NetApplications, Windows XP has fallen below 40 percent market for the first time since it passed the mark a decade ago.
Vista continued its slow but sure decline, falling from 8 percent at the beginning of the year to 5.7 percent now.
Windows 8, released in late October, moved up to 1.09 percent share.
Apple's Mac OS X versions 10.6 and 10.7 combined for 4.38 percent while Linux and "others" combined for the remaining 4.5 percent.






