Where is the Official list of Windows Environment Variables?

Question

I'm working on some .BAT stuff created in a legacy application, which uses many environment variables. I need to kwnow exactly what is every one of them (%windir%, %os%, etc.).

So I need the OFFICIAL Microsoft Documentation about the System Environment Variables of Windows (at least from the NT version).

I've reading some sites with partial iformation (there are variables abscent, such as %os%), so I really want to look at the Official info.

Searching with Google, Bing and inside the MSDN site give just reports about one or other varialbe, but no a comprehensive and centralized list of all.

Anybody knows where is that documentation available?

Answer 1

Site? Maybe not? Try this link. The list even breaks it down to what OS can use it. The variable will look a little different. That is only because it is missing the percent signs that are at the beginning and end.

Still not happy? Try this opening Command Prompt and type set and hit enter. It will list all the variables. As with the site listed above, the variable here will also look a little different.

Answer 2

No complete list either but this link may already help to detect the OS you have: http://support.microsoft.com/kb/190899

Typing set in cmd.exe for getting a list of all really used variables on your system is known I assume?!

Answer 3

Here! This is the x64 list of known variables. I found it because I needed help with a list. I also just posted it here if you still need it.

Variables List Windows 7 x64

or run a search on this site for Variables List

here is the actual site

http://social.technet.microsoft.com/search/en-us?query=known+variables+for+64bit+windows+7&x=0&y=0

Answer 4

So, there is no official set of predefined environment variables for any specific Windows OS. At least not published in the web. Thanks for the other answers.