On the page http://www.redhat.com/security/updates/errata/ The architecture x86_64 is referred to as AMD64 On other pages, e.g. http://www.redhat.com/docs/manuals/enterprise/ This architecture is referred to as AMD64 / Intel® EM64T
Forwarded to internal traffic queue.
Correction, the reference of the omitted EM64T http://www.redhat.com/security/updates/errata/ should have been http://www.redhat.com/security/updates/notes/ Also, I note that the RHEL documentation page at http://www.redhat.com/docs/manuals/enterprise/ sometimes includes EM64T next to AMD64, as is the case with release notes, but sometimes omits it, as is the case with the Install guide: "Red Hat Enterprise Linux Installation Guide for the x86, Itanium™, and AMD64 Architectures" E.g. there is an overall lack of consistency on this matter. I would recommend that the name x86_64 be used for this architecture name throughout a) it is shorter than saying "AMD64 / Intel® EM64T" every time b) it is more correct, since the hardware architectures in (a) can run either x86_64 or x86 versions of RHEL c) it is closer in name to the x86 version.
This has been forwarded to the appropriate web group.