Windows Server 2008

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Windows Server 2008 is the server counterpart of Windows Vista.

Editions
Most editions of Windows Server 2008 are available in x86-64 and IA-32 versions. Windows Server 2008 for Itanium-based Systems supports IA-64 processors. Microsoft has optimized the IA-64 version for high-workload scenarios like database servers and Line of Business (LOB) applications. As such it is not optimized for use as a file server or media server. Microsoft has announced that Windows Server 2008 is the last 32-bit Windows server operating system.[26] Windows Server 2008 is available in the editions listed below,[27] similar to Windows Server 2003.

Windows Server 2008 Standard (IA-32 and x86-64)

Windows Server 2008 Enterprise (IA-32 and x86-64)

Windows Server 2008 Datacenter (IA-32 and x86-64)

Windows HPC Server 2008 (Codenamed "Socrates") (replacing Windows Compute Cluster Server 2003)

Windows Web Server 2008 (IA-32 and x86-64)

Windows Storage Server 2008 (Codenamed "Magni") (IA-32 and x86-64)

Windows Small Business Server 2008 (Codenamed "Cougar") (x86-64) for small businesses

Windows Essential Business Server 2008 (Codenamed "Centro") (x86-64) for medium-sized businesses[28] (Discontinued) [29]

Windows Server 2008 for Itanium-based Systems

Windows Server 2008 Foundation (Codenamed "Lima")

Server Core is available in the Web, Standard, Enterprise and Datacenter editions. It is not available in the Itanium edition. Server Core is simply an alternate installation option supported by some of the editions, and not a separate edition by itself. Each architecture has a separate installation DVD.