Server operating systems

Server operating systems @ http://www.pcworld.idg.com.au/index.php/id;1327251104and http://www.osdata.com/

What is a server operating system?
Server OSes are designed from the ground up to provide platforms for multi-user, frequently business-critical, networked applications. As such, the focus of such operating systems tends to be security, stability and collaboration, rather than user interface.
Server OSes provide a platform for multi-user applications, and most come bundled with a batch of common server applications, such as Web servers, e-mail agents and terminal services.

This web site compares and contrasts operating systems. It originally started out on a small server in the engineering department of Ohio State University to answer a single question: “On technical considerations only, how does Rhapsody (also known as Mac OS X Server) stack up as a server operating system (especially in comparison to Windows NT)?” The web site now compares and contrasts server operating systems and will in the near future expand to compare other kinds of operating systems.