NetMarketShare is best known for measuring browser usage, collecting data on user visits to more than 40,000 websites.
But they also detect what operating system is running - and access to the Internet from a mobile operating system nearly doubled in total share from a year ago, to 5.5%.
And, in July 2011, users running XP fell to just below 50% for the first time in a very long time. Windows 7 was responsible for 28% of the visits, and Vista only 9%. This reflects a drop in Windows usage to below 90% from a year ago, down to about 87% from 91% one year ago, as Mac usage edged up towards 6%.