1  
   2  %SystemDrive%  		C:
   3  
   4  %SystemRoot% 		C:\WINNT, C:\WINDOWS
   5  
   6  %SystemDirectory% 	C:\WINNT\System32, C:\WINDOWS\System32
   7  
   8  %WinDir% 		C:\WINNT, C:\WINDOWS, C:\WINNT\Program Files
   9  
  10  %ComSpec% 		C:\WINNT\system32\cmd.exe
  11  
  12  %Temp% 			C:\DOCUME~1\Usr\LOCALS~1\Temp from C:\Documents and Settings\Usr\Local Settings\Temp
  13  
  14  %HOMEDRIVE% 		C: The drive letter associated with the user's home directory
  15  
  16  %HOMEPATH% 		The path to the user's home directory (excluding drive): \Documents and Settings\Guest
  17  
  18  %OS% 			Windows_NT -> The operating system the user is running
  19  
  20  %USERDOMAIN% 		The name of the domain that contains the user's account
  21  
  22  %USERNAME% 		The user's name