The XP Family

The Windows XP Family:

Windows XP Home Edition For home users, Personalized Welcome Screen, fast user switching 
Windows XP Professional

Windows XP Professional 64 bit

For corporate users. 2 processors, 4GB memory
Windows .NET Web Server Microsoft's new offering built for front-end Web serving and hosting, providing a platform for the rapid development and deployment of Web services, sites and applications
Windows .NET Standard Server

Windows .NET Advanced Server 64 bit

Tailored to meet the specific needs of smaller businesses and departmental file-and-print environments, with powerful server capabilities and ease of use and configuration.

Business Critical Servers: Supports 8 processors, 8 GB memory, 2 node Clustering, 32 node Network Load balancing

Windows .NET Data center Server 32 bit

Windows .NET Data center Server 64 bit

Microsoft's continuing advancement of the Datacenter Program, designed to provide the highest levels of scalability and reliability, enabling critical solutions for databases; ERP; high-volume, real-time transaction processing; and server consolidation

Mission critical High availability: 32 processors, 64 GB, 4 node clustering, 32 node Network Load Balancing, Winsock Direct

Windows XP Embedded For PDA, and Thin Clients (WBT)
Windows .NET Enterprise Server Extraordinary enterprise-platform capability with complete support for business-wide computing infrastructures, line-of-business applications and e-commerce transactions