Default Environment Variable Values of Windows XP / 7

This list may help programmers in developing their software for Windows XP and 7. If I have missed any variables, notify me through the comments.

[adsense]

Windows XP  Environment variables

Variable	Windows XP
%ALLUSERSPROFILE% (%PROGRAMDATA%)	C:Documents and SettingsAll Users
%APPDATA%	C:Documents and Settings{username}Application Data
%COMPUTERNAME%	{computername}
%COMMONPROGRAMFILES%	C:Program FilesCommon Files
%COMMONPROGRAMFILES(x86)%	C:Program Files (x86)Common Files
%COMSPEC%	C:WindowsSystem32cmd.exe
%HOMEDRIVE%	C:
%HOMEPATH%	Documents and Settings{username}
%LOCALAPPDATA%	Not available
%LOGONSERVER%	{domain_logon_server}
%PATH%	C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;{plus program paths}
%PATHEXT%	.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.WSF;.WSH
%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
%TEMP% and %TMP%	C:Documents and Settings{username}Local SettingsTemp
%USERDOMAIN%	{userdomain}
%USERNAME%	{username}
%USERPROFILE%	C:Documents and Settings{username}
%WINDIR%	C:Windows
%PUBLIC%
%PROGRAMDATA%	Only available in Windows Vista and newer versions
%PSModulePath%

Windows 7 Environment variables

Variable	Windows Vista/7
%ALLUSERSPROFILE% (%PROGRAMDATA%)	C:ProgramData
%APPDATA%	C:Users{username}AppDataRoaming
%COMPUTERNAME%	{computername}
%COMMONPROGRAMFILES%	C:Program FilesCommon Files
%COMMONPROGRAMFILES(x86)%	C:Program Files (x86)Common Files
%COMSPEC%	C:WindowsSystem32cmd.exe
%HOMEDRIVE%	C:
%HOMEPATH%	Users{username}
%LOCALAPPDATA%	C:Users{username}AppDataLocal
%LOGONSERVER%	{domain_logon_server}
%PATH%	C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;{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}AppDataLocalTemp
%USERDOMAIN%	{userdomain}
%USERNAME%	{username}
%USERPROFILE%	C:Users{username}
%WINDIR%	C:Windows
%PUBLIC%	C:UsersPublic
%PROGRAMDATA%	C:ProgramData
%PSModulePath%	%SystemRoot%system32WindowsPowerShellv1.0Modules