Powershell – Powershell is in an interactive shell which supports scripting. You can download this from http://support.microsoft.com/kb/926139

Displays all the command available in Powershell
PS>Get-Command

CommandType Name Definition
———– —- ———-
Cmdlet Add-Content Add-Content [-Path] [-Value] <Object[…
Cmdlet Add-History Add-History [[-InputObject] ] [-Pass…
…

Get-Help [Name] – Help on command with description and parameter it takes
PS>Get-Help Get-Process

NAME
Get-Process

SYNOPSIS
Gets the processes that are running on the local computer.

SYNTAX
Get-Process [[-name] ] []

Get-Process -id []
Get-Process -inputObject []
….