Windows Server 2003 operating systems take the best of Windows 2000 Server technology and make it easier to deploy, manage, and use. The result: a highly productive infrastructure that helps make your network a strategic asset for your organization. As of March 28, 2005, all Windows Server 2003 operating systems ship with Windows Server Service Pack 1 (SP1). Windows Server 2003 SP1 provides enhanced security, increased reliability, and a simplified administration to help enterprise customers across all industries.