The Mac mini with Snow Leopard Server Desktop Computer from Apple is a quiet and compact desktop server. The system, only 6.5" square and 2" high, is a great option for users who would like a compact, inexpensive system to use as a server. It ships sans optical drive, keyboard, mouse, and monitor, allowing you to add peripherals as needed.
The system is powered by 2.53GHz Intel Core 2 Duo CPU and includes 4GB of RAM, two 500GB hard drives, Bluetooth, 802.11n AirPort Extreme Wi-Fi, and integrated nVIDIA GeForce 9400M graphics.
All this hardware runs on Apple's Mac OS X Server 10.6 Snow Leopard operating system. The 64-bit server operating system can serve data to an unlimited number of PC and Mac clients. It features an innovative Server Assistant application which makes it easy for practically anyone to configure. The versatile server can be used in home, IT, Enterprise, web hosting, and many other environments.