• Rack mountable — A system that can be mounted in a rack or as a stand-alone

• Rack-Optimized — A system that has to be run in a server cabinet

• Tower/stand-alone — A system optimized for stand-alone installation only

• Blade — A discrete CPU card that slides vertically into a shared chassis. Typically several blade cards are housed in a cabinet or a stand-alone chassis, which houses a common power supply, cooling element, and network switches and connections.