> set
%SystemDrive%- C:%SystemRoot%- C:\WINDOWS%WinDir%- C:\WINDOWS%SystemDirectory%- C:\WINDOWS\System32%ComSpec%- The path including the command interpreter program (C:\WINDOWS\system32\cmd.exe)%programfiles%- C:\WINDOWS\Program Files%Temp%, %Tmp%- C:\Users\W\AppData\Local\Temp on Windows Vista & 2008%HOMEDRIVE%- The drive letter associated with the user's home directory (C:)%HOMEPATH%- The path to the user's home directory as defined in UMD/AD (excluding drive): (\Users<USERNAME> on Windows Vista & 2008)%OS%- The operating system the user is running (Windows_NT (even on Windows Vista & XP machines))%USERDOMAIN%- The name of the domain that contains the user's account. On a stand-alone machine, the same as the machine name.%USERNAME%- The user's name%USERPROFILE%- The user's root folder (C:\Users<USERNAME>)%CD%- The current directory.%DATE%- Current date in the format set by the Date command%TIME%- Current time in the format set by the Time command%ERRORLEVEL%- A number defining exit status of a previous command or called executable.%RANDOM%- A random number between 0 and 32767.