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- Embed this notice@p @cvnt @NonPlayableClown @mischievoustomato @Hyperhidrosis @frogzone >Until Longhorn leaked, nobody had heard the term "x64"
First publicly accessible Longhorn build to support amd64/x64 was 4051 (compiled on 2003-10-01) which wasn't leaked but given out to devs at PDC 2003, and as far as I know it doesn't refer to itself as x64 anywhere. M$ was developing an amd64 port of XP (actually Server 2003 with client SKU) in parallel, and build 3790.1137 (compiled on 2003-11-20) at that point was referred to as "64-Bit Edition For 64-bit Extended Systems". It appears the "x64 Edition" moniker was conceived only sometime in 2004 as the build 3790.1173 (2004-03-18) is the first one with screenshots to refer to itself as such. Even then, M$ continued to use "amd64" internally as it can be seen, for example, in any of the ISOs before they switched to packing system files in WIM. Needless to say, it's a clusterfuck.
>It's baffling: 64 is less than 86, and what does the "x" stand for?
Wait until you see Linux's x32 ABI.