This mentions only in passing the 64-bit RISCs that preceded AMD64 &amp; Itanium. Also some outright fiction like &quot;IA64 provided unmatched performance on scale-up workloads&quot;. I guess the Microsoft authors don&#x27;t want to talk about shipping a 32-bit NT on those while the competition had all 64-bit sw stacks :)<p>Very interesting read still.