Windows Server 2003 R2 Enterprise SP2 was released in two distinct architectural versions:

Her phone buzzed again. “It’s back! The stroke scan is running. Whoa… that’s a massive clot. Good catch, Mia.”

The Enterprise Edition was specifically positioned between the Standard and Datacenter editions, tailored for medium-to-large businesses requiring high availability, clustering capabilities, and massive memory support. 32-Bit (x86) vs. 64-Bit (x64) Architectures