Listing installed roles and features..

From Evernote:

Install, Remove and Display Roles and Features Clipped from: http://codygros.wordpress.com/2009/10/20/using-powershell-on-windows-server-2008-r2-server-core/

Get-WindowsFeature | Where {$_.installed –eq $true}

Dism /online /get-features /format:table