What is the difference between RTM and RST? I only know there will be PC, Tablet, Mobile etc editions? Also I know there will be a Windows 8 Pro release too.
closed as off topic by soandos, avirk, Hennes, Tom Wijsman, Dave M Oct 22 '12 at 14:09
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RTM means "Released To Manufacturing" and was already available over the Internet (MSDN) before the official release date and so many developers already use this final windows.
Before the RTM there was also the "Release Preview" Version, that is more like the Demo Version and was for free, but has an expiration date.
Otherwise the Windows 8 family is called Editions. There are 4 main products:
RST Intel® Rapid Storage Technology has nothing to do with Windows, but maybe you refer to the Storage Spaces feature in the Windows (non RT) versions.
Windows 8 RTM stands for Release to manufacturing. This is the final version that goes out to manufacturers and will eventually be released for sale - it comes in different editions such as standard/pro/enterprise.
The difference being, standard (or just Windows 8) is the main stream version, Pro allows for joining domain and enterprise is pretty much the same as pro with some additional features that are good for businesses.
RST stands for Rapid Storage Technology that is an Intel technology and not specifically to do with Windows.
Windows RT is the version of Windows that is designed just for ARM based devices such as tablets.
Wikipedia has a good table to show you the difference in versions