If you experience an Mac OS X program to freeze and you cannot exit it by clicking quit or using a keyboard shortcut, you can always force it to quit using the Activity Monitor.
Jolla has just introduced its first mobile phone with Sailfish operating system, which is a unofficial upgrade of very well reviewed Nokia N9 mobile operating system MeeGo and its looking great.
There are some confusions about the features and and differences between the Windows 8 RT that came out with the Surface tablet and the "normal" version of Windows 8.