Windows Server 2003

Windows Server 2003 is the server counterpart of Windows XP. It comes in editions like Datacenter, Web Server, Standard, Enterprise and Small Business (the latter is technically a separate version). It replaces Windows 2000 Server and was replaced by Windows Server 2008.

It is the last version of Windows that supports computers without ACPI. It is also the last version of Windows to use NTLDR to boot the system.

Release 2
An interim release under the name of Windows Server 2003 R2 was released on December 6, 2005.

Other versions
As well as the standard Windows Server 2003, several other editions were built on the NT 5.2 kernel, including Storage Server 2003 (released on 10 September 2003), Storage Server 2003 R2 (released on 6 March 2006), Compute Cluster Server 2003 (released on 9 June 2006), Small Business Server 2003 R2 (released on 1 September 2006) and Unified Data Storage Server 2003 (released on 5 December 2006).

Startup sound
There's a widespread misconception that this startup sound from a promotion animation (cut by TheCanadianToast) is used for a version of Windows Server 2003 for the United Kingdom. However, no country-specific edition of Windows was ever made until Microsoft was forced to make N and KN variants for Europe and South Korea respectively which removes Windows Media Player and other features due to antitrust lawsuits; Windows didn't have UK English as a display language option until Windows 8. All versions and localizations of Windows Server 2003 use the Windows XP startup sound.