MSCmd

http://ss64.com/nt/syntax-variables.html

http://www.binbert.com/blog/2010/09/default-environment-variable-values-of-windows-7-xp/

Variable	Windows XP --- Windows Vista/7
%ALLUSERSPROFILE% (%PROGRAMDATA%)	C:\Documents and Settings\All Users --- C:\ProgramData
%APPDATA%	C:\Documents and Settings\{username}\Application Data --- 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%	\Documents and Settings\{username} --- \Users\{username}
%LOCALAPPDATA%	Not available --- C:\Users\{username}\AppData\Local
%LOGONSERVER%	\\{domain_logon_server}
%PATH%	C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;{plus program paths} --- C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;{plus program paths}
%PATHEXT%	.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.WSF;.WSH --- .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%	The Windows directory, usually C:\Windows, formerly C:\WINNT --- C:\Windows
%TEMP% and %TMP%	C:\Documents and Settings\{username}\Local Settings\Temp --- C:\Users\{username}\AppData\Local\Temp
%USERDOMAIN%	{userdomain}
%USERNAME%	{username}
%USERPROFILE%	C:\Documents and Settings\{username} --- C:\Users\{username}
%WINDIR%	C:\Windows
%PUBLIC%	--- C:\Users\Public
%PROGRAMDATA%	Only available in Windows Vista and newer versions --- C:\ProgramData
%PSModulePath%	--- %SystemRoot%\system32\WindowsPowerShell\v1.0\Modules\

Escape

http://stackoverflow.com/a/33868784/1108919