Windows 32bit Family XP RTM - 5.1.2600
XP SP1a - 1106
XP SP2 - 2180
Server 2003 RTM - 5.2.3790
Server 2003 SP1 - 1830
Server 2003 SP2 - 3959
Vista RTM - 6000.16386
Server 2008 Beta 3 - 6001.16510
Windows 64bit Family XP 64bit RTM - 5.2.3790.1830
XP 64bit SP2 - 3959
Server 2003 64bit RTM - 5.2.3790.1830
Server 2003 64bit SP2 - 3959
Vista 64bit RTM - 6000.16386
Server 2008 64bit Beta 3 - 6001.16510
A few days ago I was reading an article over at the Realtime Windows Server Community (noticed it via ActiveWin) where they were wondering whether Microsoft would release an RC2 build of Server 2008 prior to RTM. Well, thanks to the new Windows Server 2008 RC1 with Hyper-V Beta which is publicly available here, Microsoft may have inadvertently already answered that exact question. Since the Server 2008 build included with the Hyper-V Beta is a newer compile (6001.17119) than the originally released Server 2008 RC1 (6001.17051), Microsoft have included an updated EULA which directly mentions RC2:
Of course this doesn't guarantee that Microsoft will definitely release an RC2 build however it probably is a pretty good indication of things to come.