Professional
x64 Edition is
based on the
Windows
Server 2003
codebase.
For x86 processors
supporting the x64
extensions.
The 2003 64-bit
Edition was based
on Windows
Server 2003
For 64-bit Intel
Itanium Processors.
2002 Version based on
regular Windows XP.
Home Edition,
Professional
Codebase
XP Home
XP
Professional
XP
"Home"
Editions
"Pro"
Editions
64-bit
Editions
XP x86
Center
Media
Edition
Server
Windows
2003
Edition
64-bit
2003
Edition
64-bit
2002
x64 Edition
Professional