Windows 7 Environment variables
The variables most likely apply to later versions of Windows too.

Variable name	Value
%ALLUSERSPROFILE% (%PROGRAMDATA%)	C:\ProgramData
%APPDATA%	C:\Users\{username}\AppData\Roaming
%COMPUTERNAME%	{computername}
%COMMONPROGRAMFILES%	C:\Program Files\Common Files
%COMMONPROGRAMFILES(x86)%	C:\Program Files (x86)\Common Files
%COMSPEC%	C:\Windows\System32\cmd.exe
%HOMEDRIVE%	C:
%HOMEPATH%	\Users\{username}
%LOCALAPPDATA%	C:\Users\{username}\AppData\Local
%LOGONSERVER%	\\{domain_logon_server}
%PATH%	C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;{plus program paths}
%PATHEXT%	.com;.exe;.bat;.cmd;.vbs;.vbe;.js;.jse;.wsf;.wsh;.msc
%PROGRAMFILES%	C:\Program Files
%PROGRAMFILES(X86)%	C:\Program Files (x86) (only in 64-bit version)
%PROMPT%	Code for current command prompt format. Code is usually $P$G
%SystemDrive%	C:
%SystemRoot%	C:\Windows
%TEMP% and %TMP%	C:\Users\{username}\AppData\Local\Temp
%USERDOMAIN%	{userdomain}
%USERNAME%	{username}
%USERPROFILE%	C:\Users\{username}
%WINDIR%	C:\Windows
%PUBLIC%	C:\Users\Public
%PROGRAMDATA%	C:\ProgramData
%PSModulePath%	%SystemRoot%\system32\WindowsPowerShell\v1.0\Modules\

Tags: Windows

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