Powershell 1.5 : PowerShell ISE and File Extension

PowerShell ISE

The Windows PowerShell Integrated Scripting Environment (ISE) is one of two hosts for the
Windows PowerShell engine and language. With it you can write, run, and test scripts in ways that
are not available in the Windows PowerShell Console

Extension : PowerShell scripts (files suffixed by .ps1 )

Below is how ISE looks Like with
Script Pane (In White), Execution Pane (In Blue), On right side you can find the cmdlets from each Module