Microsoft Windows Server Enterprise 2003 64 Bit - 25 Client review:
Microsoft Windows Server Enterprise 2003 64 Bit - 25 Client Features:
Windows Server 2003 Enterprise Edition, 64-bit version is compatible only with 64-bit Intel Itanium-based systems and cannot install on 32-bit systems.
Get all the functionality you expect from a server operating system, including multiprocessor and 64-bit support, clustering, and other improvements.
Scale from single-processor systems to 128-way systems, with support for up to 64 processors (32- and 64-bit) and 512 GB of memory in one system.
New features eliminate common causes of reboots and outages, helping you realize significant cost savings through less planned and unplanned downtime.
Connect your intranets, extranets, and the Web with optimized support for XML and .NET. Easily develop, distribute, and host XML Web services.

Microsoft Windows Server Enterprise 2003 64 Bit - 25 Client is the CD-ROM version. The full version can be purchased by clicking on the "CLICK HERE TO ORDER" button below for around 3,549.99USD.