Designed for mission-critical server workloads, Windows Server 2003, Enterprise Edition, is the recommended operating system for servers that run applications such as networking, messaging, inventory, and customer service systems; databases; and e-commerce Web sites. Windows Server 2003, Enterprise Edition, delivers high reliability, performance, and superior business value and is available in both 32-bit and 64-bit versions. Windows Server 2003, Enterprise Edition, differs from Windows Server 2003, Standard Edition, primarily in its support for high-performance servers and its ability to cluster servers for greater load handling. These capabilities provide reliability that helps ensure systems remain available even if problems arise.