Chances are that if you work with Windows computers you've heard of Windows PowerShell. You may even have read other books about PowerShell and put PowerShell to work. However, you probably still have many questions about PowerShell, or you may simply be curious about what PowerShell 3.0 and PowerShell 4.0 have to offer that their predecessors didn't.

Windows PowerShell 3.0 and Windows PowerShell 4.0 are enhanced and extended editions of the original implementations of PowerShell. The changes are dramatic, and they improve both the performance capabilities of PowerShell and its...