Microsoft has really trimmed the fat off of Windows Server to make Nano Server, in fact they may have cut off some of the meat as well.  A Microsoft engineer described it as "a model of 'just enough OS'.", which is why the new Server OS base install is a mere 400MB.  The GUI is gone, you will use Windows Management Instrumentation (WMI) or the new Core PowerShell which will resemble the old Powershell, but again in a cut down manner.  Drivers and APIs are minimal which will take programmers some time to adjust to as the DLL that they current use may not exist on Core and the installer you all know and hate, Windows MSI is one of the ones which has been cut.  In order to install drivers and applications which currently rely on MSI, you will need to add them to your image.  Read more about this major change in the way you will manage your Windows servers over at The Register.

"Engineers from Microsoft's Windows Server team took the stage at the Build developer conference in San Francisco this week to share more details on Nano Server, the upcoming micro-sized version of the OS aimed at cloud deployments."

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