Windows Server 2003 R2 Standard Edition Brand new sealed 5 CAL Windows Server 2003 R2 Standard Edition is the ideal multipurpose network operating system for the everyday needs of organizations of all sizes, but especially small businesses and workgroups. The Windows Server 2003 R2 operating system extends Windows Server 2003, providing a more efficient way to manage and control access to local and remote resources, while at the same time integrating easily into your existing Windows Server 2003 environment. Windows Server 2003 R2 provides a scalable, security-enhanced Web platform and enables new scenarios, including simplified branch-server management, improved identity and access management, and more efficient storage management. The R2 release builds upon the increased security, reliability, and performance provided by Windows Server 2003 Service Pack 1.