• Supports servers of any size
• Available for 32/64-bit x86, Itanium2, IBM POWER
• Available with Standard or Premium support
• Supports unlimited virtual guests and storage virtualization

• Supports servers with up to 2 processor sockets
• Available for 32/64-bit x86, Itanium2, IBM POWER
• Available with Basic, Standard or Premium support
• Supports 4 virtual guests

• 2 and 4 processor socket variants available
• Available with Basic support
• No virtualization

• Available with Standard or Premium support
• Per IFL subscriptions

• Supports 32/64-bit x86
• Supports clients with 1 processor socket and 4 GB memory
• Available with Basic support
• No virtualization
• Workstation option adds support for 2 processor sockets unlimited memory
• Workstation option available with Standard support
• Multi OS option adds support for 4 virtual guests

The premier Red Hat computing environment. Red Hat Enterprise Linux functionality with extended, industry leading, server and storage virtualization (unlimited guests) combined with high availability clustering capabilities. Seamless upgrade from previous AS releases. Excellent scalability; enables optimal resource utilization in environments with multiple servers. Ideal for dynamic and growing server configurations, offering maximum operational control and flexibility. Use in environments where continuous operation, plentiful resources and the highest levels of flexibility are required.

Classic Red Hat Enterprise Linux functionality with limited virtualization (up to 4 guests) and scalability. Equivalent to earlier ES products. Suitable for small/medium, fixed-function server environments.